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1 | 1 | c = get_config() |
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2 | 2 | |
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3 | 3 | |
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4 | c.ConverterTemplate.extract_figures=False | |
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5 | 4 | c.ConverterTemplate.template_file='basichtml' |
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6 | 5 | c.ConverterTemplate.tex_environement=False |
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7 | 6 | |
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8 | 7 | c.NbconvertApp.fileext='html' |
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9 | 8 | |
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10 |
c.ExtractFigureTransformer.enabled |
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9 | c.ExtractFigureTransformer.enabled=False | |
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11 | 10 | c.CSSHtmlHeaderTransformer.enabled=True |
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1 | 1 | c = get_config() |
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2 | ||
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2 | 3 | load_subconfig('base_html.nbcv') |
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3 | 4 | |
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4 | 5 | c.ConverterTemplate.template_file='fullhtml' |
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5 | 6 |
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1 | 1 | c = get_config() |
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2 | 2 | |
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3 | c.ConverterTemplate.extract_figures=True | |
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4 | 3 | c.ConverterTemplate.template_file='latex_base' |
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5 | 4 | c.ConverterTemplate.tex_environement=True |
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6 | c.ConverterTemplate.display_data_priority=['latex', 'svg', 'png', 'jpg', 'jpeg' , 'text'] | |
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7 | c.ExtractFigureTransformer.display_data_priority=['latex', 'svg', 'png', 'jpg', 'jpeg'] | |
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5 | ||
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6 | ||
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8 | 7 | c.NbconvertApp.fileext='tex' |
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9 | 8 | |
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9 | c.GlobalConfigurable.display_data_priority =['latex', 'svg', 'png', 'jpg', 'jpeg' , 'text'] | |
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10 | # do not extract text | |
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11 | c.ExtractFigureTransformer.display_data_priority=['latex', 'svg', 'png', 'jpg', 'jpeg'] | |
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12 | ||
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13 | ||
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10 | 14 | c.ExtractFigureTransformer.extra_ext_map={'svg':'pdf'} |
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11 | 15 | c.ExtractFigureTransformer.enabled=True |
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1 | 1 | c = get_config() |
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2 | 2 | |
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3 | c.ConverterTemplate.extract_figures=False | |
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4 | 3 | c.ConverterTemplate.template_file='python' |
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5 | 4 | c.ConverterTemplate.tex_environement=False |
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6 | 5 | |
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7 | 6 | c.NbconvertApp.fileext='py' |
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1 | 1 | c = get_config() |
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2 | 2 | |
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3 | c.ConverterTemplate.extract_figures=True | |
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4 | 3 | c.ConverterTemplate.template_file='rst' |
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5 | 4 | c.ConverterTemplate.tex_environement=False |
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6 | 5 | |
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7 | 6 | c.NbconvertApp.fileext='rst' |
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8 | 7 | c.ExtractFigureTransformer.enabled=True |
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9 | 8 | |
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9 | c.GlobalConfigurable.display_data_priority =['svg', 'png', 'latex', 'jpg', 'jpeg','text'] | |
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10 | 10 | c.ExtractFigureTransformer.display_data_priority=['svg', 'png', 'latex', 'jpg', 'jpeg','text'] |
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11 | 11 | c.ConverterTemplate.display_data_priority= ['svg', 'png', 'latex', 'jpg', 'jpeg','text'] |
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12 | 12 | |
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13 | 13 |
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1 | NO CONTENT: file renamed from tests/ipynbref/00_notebook_tour.orig.rst to tests/ipynbref/00_notebook_tour_orig.rst |
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1 | 1 | A brief tour of the IPython notebook |
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2 | 2 | ==================================== |
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3 | 3 | |
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4 | 4 | This document will give you a brief tour of the capabilities of the |
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5 | 5 | IPython notebook. |
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6 | 6 | You can view its contents by scrolling around, or execute each cell by |
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7 | 7 | typing ``Shift-Enter``. After you conclude this brief high-level tour, |
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8 | 8 | you should read the accompanying notebook titled |
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9 | 9 | ``01_notebook_introduction``, which takes a more step-by-step approach |
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10 | 10 | to the features of the system. |
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11 | 11 | |
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12 | 12 | The rest of the notebooks in this directory illustrate various other |
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13 | 13 | aspects and capabilities of the IPython notebook; some of them may |
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14 | 14 | require additional libraries to be executed. |
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15 | 15 | |
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16 | 16 | **NOTE:** This notebook *must* be run from its own directory, so you |
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17 | 17 | must ``cd`` to this directory and then start the notebook, but do *not* |
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18 | 18 | use the ``--notebook-dir`` option to run it from another location. |
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19 | 19 | |
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20 | 20 | The first thing you need to know is that you are still controlling the |
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21 | 21 | same old IPython you're used to, so things like shell aliases and magic |
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22 | 22 | commands still work: |
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23 | 23 | |
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24 | 24 | In[1]: |
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25 | 25 | |
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26 | 26 | .. code:: python |
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27 | 27 | |
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28 | 28 | pwd |
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29 | 29 | |
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30 | 30 | Out[1]: |
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31 | 31 | .. parsed-literal:: |
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32 | 32 | |
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33 | 33 | u'/Users/minrk/dev/ip/mine/docs/examples/notebooks' |
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34 | 34 | |
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35 | 35 | |
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36 | 36 | In[2]: |
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37 | 37 | |
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38 | 38 | .. code:: python |
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39 | 39 | |
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40 | 40 | ls |
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41 | 41 | |
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42 | 42 | |
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43 | 43 | .. parsed-literal:: |
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44 | 44 | |
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45 | 45 | 00_notebook_tour.ipynb callbacks.ipynb python-logo.svg |
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46 | 46 | 01_notebook_introduction.ipynb cython_extension.ipynb rmagic_extension.ipynb |
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47 | 47 | Animations_and_Progress.ipynb display_protocol.ipynb sympy.ipynb |
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48 | 48 | Capturing Output.ipynb formatting.ipynb sympy_quantum_computing.ipynb |
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49 | 49 | Script Magics.ipynb octavemagic_extension.ipynb trapezoid_rule.ipynb |
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50 | 50 | animation.m4v progbar.ipynb |
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51 | 51 | |
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52 | 52 | In[3]: |
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53 | 53 | |
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54 | 54 | .. code:: python |
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55 | 55 | |
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56 | 56 | message = 'The IPython notebook is great!' |
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57 | 57 | # note: the echo command does not run on Windows, it's a unix command. |
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58 | 58 | !echo $message |
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59 | 59 | |
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60 | 60 | |
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61 | 61 | .. parsed-literal:: |
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62 | 62 | |
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63 | 63 | The IPython notebook is great! |
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64 | 64 | |
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65 | 65 | Plots with matplotlib |
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66 | 66 | --------------------- |
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67 | 67 | |
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68 | ||
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69 | 68 | IPython adds an 'inline' matplotlib backend, which embeds any matplotlib |
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70 | 69 | figures into the notebook. |
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71 | 70 | |
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72 | 71 | In[4]: |
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73 | 72 | |
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74 | 73 | .. code:: python |
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75 | 74 | |
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76 | 75 | %pylab inline |
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77 | 76 | |
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78 | 77 | |
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79 | 78 | .. parsed-literal:: |
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80 | 79 | |
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81 | 80 | |
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82 | 81 | Welcome to pylab, a matplotlib-based Python environment [backend: module://IPython.zmq.pylab.backend_inline]. |
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83 | 82 | For more information, type 'help(pylab)'. |
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84 | 83 | |
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85 | 84 | In[5]: |
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86 | 85 | |
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87 | 86 | .. code:: python |
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88 | 87 | |
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89 | 88 | x = linspace(0, 3*pi, 500) |
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90 | 89 | plot(x, sin(x**2)) |
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91 | 90 | title('A simple chirp'); |
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92 | 91 | |
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93 | 92 | .. image:: _fig_07.png |
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94 | 93 | |
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95 | 94 | You can paste blocks of input with prompt markers, such as those from |
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96 | 95 | `the official Python |
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97 | 96 | tutorial <http://docs.python.org/tutorial/interpreter.html#interactive-mode>`_ |
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98 | 97 | |
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99 | 98 | In[6]: |
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100 | 99 | |
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101 | 100 | .. code:: python |
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102 | 101 | |
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103 | 102 | >>> the_world_is_flat = 1 |
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104 | 103 | >>> if the_world_is_flat: |
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105 | 104 | ... print "Be careful not to fall off!" |
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106 | 105 | |
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107 | 106 | |
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108 | 107 | .. parsed-literal:: |
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109 | 108 | |
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110 | 109 | Be careful not to fall off! |
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111 | 110 | |
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112 | 111 | Errors are shown in informative ways: |
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113 | 112 | |
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114 | 113 | In[7]: |
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115 | 114 | |
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116 | 115 | .. code:: python |
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117 | 116 | |
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118 | 117 | %run non_existent_file |
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119 | 118 | |
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120 | 119 | |
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121 | 120 | .. parsed-literal:: |
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122 | 121 | |
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123 | 122 | ERROR: File `u'non_existent_file.py'` not found. |
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124 | 123 | In[8]: |
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125 | 124 | |
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126 | 125 | .. code:: python |
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127 | 126 | |
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128 | 127 | x = 1 |
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129 | 128 | y = 4 |
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130 | 129 | z = y/(1-x) |
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131 | 130 | |
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132 | 131 | :: |
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133 | 132 | |
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134 | 133 | --------------------------------------------------------------------------- |
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135 | 134 | ZeroDivisionError Traceback (most recent call last) |
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136 | 135 | <ipython-input-8-dc39888fd1d2> in <module>() |
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137 | 136 | 1 x = 1 |
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138 | 137 | 2 y = 4 |
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139 | 138 | ----> 3 z = y/(1-x) |
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140 | 139 | |
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141 | 140 | ZeroDivisionError: integer division or modulo by zero |
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142 | 141 | When IPython needs to display additional information (such as providing |
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143 | 142 | details on an object via ``x?`` it will automatically invoke a pager at |
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144 | 143 | the bottom of the screen: |
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145 | 144 | |
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146 | 145 | In[18]: |
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147 | 146 | |
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148 | 147 | .. code:: python |
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149 | 148 | |
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150 | 149 | magic |
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151 | 150 | |
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152 | 151 | Non-blocking output of kernel |
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153 | 152 | ----------------------------- |
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154 | 153 | |
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155 | 154 | If you execute the next cell, you will see the output arriving as it is |
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156 | 155 | generated, not all at the end. |
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157 | 156 | |
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158 | 157 | In[19]: |
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159 | 158 | |
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160 | 159 | .. code:: python |
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161 | 160 | |
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162 | 161 | import time, sys |
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163 | 162 | for i in range(8): |
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164 | 163 | print i, |
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165 | 164 | time.sleep(0.5) |
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166 | 165 | |
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167 | 166 | |
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168 | 167 | .. parsed-literal:: |
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169 | 168 | |
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170 | 169 | 0 1 2 3 4 5 6 7 |
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170 | ||
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171 | 171 | Clean crash and restart |
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172 | 172 | ----------------------- |
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173 | 173 | |
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174 | 174 | We call the low-level system libc.time routine with the wrong argument |
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175 | 175 | via ctypes to segfault the Python interpreter: |
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176 | 176 | |
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177 | 177 | In[*]: |
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178 | 178 | |
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179 | 179 | .. code:: python |
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180 | 180 | |
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181 | 181 | import sys |
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182 | 182 | from ctypes import CDLL |
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183 | 183 | # This will crash a Linux or Mac system; equivalent calls can be made on Windows |
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184 | 184 | dll = 'dylib' if sys.platform == 'darwin' else '.so.6' |
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185 | 185 | libc = CDLL("libc.%s" % dll) |
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186 | 186 | libc.time(-1) # BOOM!! |
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187 | 187 | |
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188 | 188 | Markdown cells can contain formatted text and code |
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189 | 189 | -------------------------------------------------- |
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190 | 190 | |
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191 | 191 | You can *italicize*, **boldface** |
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192 | 192 | |
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193 | 193 | - build |
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194 | 194 | - lists |
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195 | 195 | |
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196 | 196 | and embed code meant for illustration instead of execution in Python: |
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197 | 197 | |
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198 | 198 | :: |
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199 | 199 | |
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200 | 200 | def f(x): |
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201 | 201 | """a docstring""" |
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202 | 202 | return x**2 |
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203 | 203 | |
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204 | 204 | or other languages: |
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205 | 205 | |
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206 | 206 | :: |
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207 | 207 | |
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208 | 208 | if (i=0; i<n; i++) { |
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209 | 209 | printf("hello %d\n", i); |
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210 | 210 | x += 4; |
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211 | 211 | } |
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212 | 212 | |
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213 | 213 | |
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214 | 214 | Courtesy of MathJax, you can include mathematical expressions both |
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215 | 215 | inline: :math:`e^{i\pi} + 1 = 0` and displayed: |
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216 | 216 | |
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217 | 217 | .. math:: e^x=\sum_{i=0}^\infty \frac{1}{i!}x^i |
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218 | 218 | |
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219 | 219 | |
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220 | 220 | |
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221 | 221 | Rich displays: include anyting a browser can show |
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222 | 222 | ------------------------------------------------- |
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223 | 223 | |
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224 | 224 | Note that we have an actual protocol for this, see the |
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225 | 225 | ``display_protocol`` notebook for further details. |
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226 | 226 | |
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227 | 227 | Images |
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228 | 228 | ~~~~~~ |
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229 | 229 | |
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230 | 230 | |
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231 | 231 | In[1]: |
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232 | 232 | |
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233 | 233 | .. code:: python |
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234 | 234 | |
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235 | 235 | from IPython.display import Image |
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236 | 236 | Image(filename='../../source/_static/logo.png') |
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237 | 237 | |
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238 | 238 | Out[1]: |
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239 | 239 | .. image:: _fig_22.png |
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240 | 240 | |
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241 | 241 | |
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242 | 242 | An image can also be displayed from raw data or a url |
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243 | 243 | |
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244 | 244 | In[2]: |
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245 | 245 | |
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246 | 246 | .. code:: python |
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247 | 247 | |
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248 | 248 | Image(url='http://python.org/images/python-logo.gif') |
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249 | 249 | |
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250 | 250 | Out[2]: |
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251 | .. parsed-literal:: | |
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252 | ||
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253 | <IPython.core.display.Image at 0x1060e7410> | |
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254 | ||
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251 | 255 | |
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252 | 256 | SVG images are also supported out of the box (since modern browsers do a |
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253 | 257 | good job of rendering them): |
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254 | 258 | |
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255 | 259 | In[3]: |
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256 | 260 | |
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257 | 261 | .. code:: python |
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258 | 262 | |
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259 | 263 | from IPython.display import SVG |
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260 | 264 | SVG(filename='python-logo.svg') |
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261 | 265 | |
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262 | 266 | Out[3]: |
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263 | 267 | .. image:: _fig_26.svg |
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264 | 268 | |
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265 | 269 | |
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266 | 270 | Embedded vs Non-embedded Images |
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267 | 271 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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268 | 272 | |
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269 | 273 | |
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270 | 274 | As of IPython 0.13, images are embedded by default for compatibility |
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271 | 275 | with QtConsole, and the ability to still be displayed offline. |
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272 | 276 | |
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273 | 277 | Let's look at the differences: |
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274 | 278 | |
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275 | 279 | In[4]: |
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276 | 280 | |
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277 | 281 | .. code:: python |
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278 | 282 | |
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279 | 283 | # by default Image data are embedded |
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280 | 284 | Embed = Image( 'http://scienceview.berkeley.edu/view/images/newview.jpg') |
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281 | 285 | |
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282 | 286 | # if kwarg `url` is given, the embedding is assumed to be false |
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283 | 287 | SoftLinked = Image(url='http://scienceview.berkeley.edu/view/images/newview.jpg') |
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284 | 288 | |
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285 | 289 | # In each case, embed can be specified explicitly with the `embed` kwarg |
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286 | 290 | # ForceEmbed = Image(url='http://scienceview.berkeley.edu/view/images/newview.jpg', embed=True) |
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287 | 291 | |
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288 | 292 | Today's image from a webcam at Berkeley, (at the time I created this |
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289 | 293 | notebook). This should also work in the Qtconsole. Drawback is that the |
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290 | 294 | saved notebook will be larger, but the image will still be present |
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291 | 295 | offline. |
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292 | 296 | |
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293 | 297 | In[5]: |
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294 | 298 | |
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295 | 299 | .. code:: python |
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296 | 300 | |
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297 | 301 | Embed |
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298 | 302 | |
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299 | 303 | Out[5]: |
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300 | 304 | ..jpg image:: |
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301 | 305 | |
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302 | 306 | |
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303 | 307 | Today's image from same webcam at Berkeley, (refreshed every minutes, if |
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304 | 308 | you reload the notebook), visible only with an active internet |
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305 | 309 | connexion, that should be different from the previous one. This will not |
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306 | 310 | work on Qtconsole. Notebook saved with this kind of image will be |
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307 | 311 | lighter and always reflect the current version of the source, but the |
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308 | 312 | image won't display offline. |
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309 | 313 | |
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310 | 314 | In[6]: |
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311 | 315 | |
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312 | 316 | .. code:: python |
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313 | 317 | |
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314 | 318 | SoftLinked |
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315 | 319 | |
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316 | 320 | Out[6]: |
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321 | .. parsed-literal:: | |
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322 | ||
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323 | <IPython.core.display.Image at 0x10fb99b10> | |
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324 | ||
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317 | 325 | |
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318 | 326 | Of course, if you re-run the all notebook, the two images will be the |
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319 | 327 | same again. |
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320 | 328 | |
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321 | 329 | Video |
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322 | 330 | ~~~~~ |
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323 | 331 | |
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324 | 332 | |
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325 | 333 | And more exotic objects can also be displayed, as long as their |
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326 | 334 | representation supports the IPython display protocol. |
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327 | 335 | |
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328 | 336 | For example, videos hosted externally on YouTube are easy to load (and |
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329 | 337 | writing a similar wrapper for other hosted content is trivial): |
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330 | 338 | |
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331 | 339 | In[7]: |
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332 | 340 | |
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333 | 341 | .. code:: python |
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334 | 342 | |
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335 | 343 | from IPython.display import YouTubeVideo |
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336 | 344 | # a talk about IPython at Sage Days at U. Washington, Seattle. |
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337 | 345 | # Video credit: William Stein. |
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338 | 346 | YouTubeVideo('1j_HxD4iLn8') |
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339 | 347 | |
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340 | 348 | Out[7]: |
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349 | .. parsed-literal:: | |
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350 | ||
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351 | <IPython.lib.display.YouTubeVideo at 0x10fba2190> | |
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352 | ||
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341 | 353 | |
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342 | 354 | Using the nascent video capabilities of modern browsers, you may also be |
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343 | 355 | able to display local videos. At the moment this doesn't work very well |
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344 | 356 | in all browsers, so it may or may not work for you; we will continue |
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345 | 357 | testing this and looking for ways to make it more robust. |
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346 | 358 | |
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347 | 359 | The following cell loads a local file called ``animation.m4v``, encodes |
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348 | 360 | the raw video as base64 for http transport, and uses the HTML5 video tag |
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349 | 361 | to load it. On Chrome 15 it works correctly, displaying a control bar at |
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350 | 362 | the bottom with a play/pause button and a location slider. |
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351 | 363 | |
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352 | 364 | In[8]: |
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353 | 365 | |
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354 | 366 | .. code:: python |
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355 | 367 | |
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356 | 368 | from IPython.display import HTML |
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357 | 369 | video = open("animation.m4v", "rb").read() |
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358 | 370 | video_encoded = video.encode("base64") |
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359 | 371 | video_tag = '<video controls alt="test" src="data:video/x-m4v;base64,{0}">'.format(video_encoded) |
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360 | 372 | HTML(data=video_tag) |
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361 | 373 | |
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362 | 374 | Out[8]: |
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375 | .. parsed-literal:: | |
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376 | ||
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377 | <IPython.core.display.HTML at 0x10fba28d0> | |
|
378 | ||
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363 | 379 | |
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364 | 380 | Local Files |
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365 | 381 | ----------- |
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366 | 382 | |
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367 | 383 | The above examples embed images and video from the notebook filesystem |
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368 | 384 | in the output areas of code cells. It is also possible to request these |
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369 | 385 | files directly in markdown cells if they reside in the notebook |
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370 | 386 | directory via relative urls prefixed with ``files/``: |
|
371 | 387 | |
|
372 | 388 | :: |
|
373 | 389 | |
|
374 | 390 | files/[subdirectory/]<filename> |
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375 | 391 | |
|
376 | 392 | For example, in the example notebook folder, we have the Python logo, |
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377 | 393 | addressed as: |
|
378 | 394 | |
|
379 | 395 | :: |
|
380 | 396 | |
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381 | 397 | <img src="files/python-logo.svg" /> |
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382 | 398 | |
|
383 | 399 | and a video with the HTML5 video tag: |
|
384 | 400 | |
|
385 | 401 | :: |
|
386 | 402 | |
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387 | 403 | <video controls src="files/animation.m4v" /> |
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388 | 404 | |
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389 | 405 | These do not embed the data into the notebook file, and require that the |
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390 | 406 | files exist when you are viewing the notebook. |
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391 | 407 | |
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392 | 408 | Security of local files |
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393 | 409 | ~~~~~~~~~~~~~~~~~~~~~~~ |
|
394 | 410 | |
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395 | 411 | Note that this means that the IPython notebook server also acts as a |
|
396 | 412 | generic file server for files inside the same tree as your notebooks. |
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397 | 413 | Access is not granted outside the notebook folder so you have strict |
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398 | 414 | control over what files are visible, but for this reason it is highly |
|
399 | 415 | recommended that you do not run the notebook server with a notebook |
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400 | 416 | directory at a high level in your filesystem (e.g. your home directory). |
|
401 | 417 | |
|
402 | 418 | When you run the notebook in a password-protected manner, local file |
|
403 | 419 | access is restricted to authenticated users unless read-only views are |
|
404 | 420 | active. |
|
405 | 421 | |
|
406 | 422 | Linking to files and directories for viewing in the browser |
|
407 | 423 | ----------------------------------------------------------- |
|
408 | 424 | |
|
409 | 425 | It is also possible to link directly to files or directories so they can |
|
410 | 426 | be opened in the browser. This is especially convenient if you're |
|
411 | 427 | interacting with a tool within IPython that generates HTML pages, and |
|
412 | 428 | you'd like to easily be able to open those in a new browser window. |
|
413 | 429 | Alternatively, if your IPython notebook server is on a remote system, |
|
414 | 430 | creating links provides an easy way to download any files that get |
|
415 | 431 | generated. |
|
416 | 432 | |
|
417 | 433 | As we saw above, there are a bunch of ``.ipynb`` files in our current |
|
418 | 434 | directory. |
|
419 | 435 | |
|
420 | 436 | In[1]: |
|
421 | 437 | |
|
422 | 438 | .. code:: python |
|
423 | 439 | |
|
424 | 440 | ls |
|
425 | 441 | |
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426 | 442 | |
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427 | 443 | .. parsed-literal:: |
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428 | 444 | |
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429 | 445 | 00_notebook_tour.ipynb formatting.ipynb |
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430 | 446 | 01_notebook_introduction.ipynb octavemagic_extension.ipynb |
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431 | 447 | Animations_and_Progress.ipynb publish_data.ipynb |
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432 | 448 | Capturing Output.ipynb python-logo.svg |
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433 | 449 | Script Magics.ipynb rmagic_extension.ipynb |
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434 | 450 | animation.m4v sympy.ipynb |
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435 | 451 | cython_extension.ipynb sympy_quantum_computing.ipynb |
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436 | 452 | display_protocol.ipynb trapezoid_rule.ipynb |
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437 | 453 | |
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438 | 454 | If we want to create a link to one of them, we can call use the |
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439 | 455 | ``FileLink`` object. |
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440 | 456 | |
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441 | 457 | In[2]: |
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442 | 458 | |
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443 | 459 | .. code:: python |
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444 | 460 | |
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445 | 461 | from IPython.display import FileLink |
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446 | 462 | FileLink('00_notebook_tour.ipynb') |
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447 | 463 | |
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448 | 464 | Out[2]: |
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465 | .. parsed-literal:: | |
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466 | ||
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467 | <IPython.lib.display.FileLink at 0x10f7ea3d0> | |
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468 | ||
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449 | 469 | |
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450 | 470 | Alternatively, if we want to link to all of them, we can use the |
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451 | 471 | ``FileLinks`` object, passing ``'.'`` to indicate that we want links |
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452 | 472 | generated for the current working directory. Note that if there were |
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453 | 473 | other directories under the current directory, ``FileLinks`` would work |
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454 | 474 | in a recursive manner creating links to files in all sub-directories as |
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455 | 475 | well. |
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456 | 476 | |
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457 | 477 | In[7]: |
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458 | 478 | |
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459 | 479 | .. code:: python |
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460 | 480 | |
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461 | 481 | from IPython.display import FileLinks |
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462 | 482 | FileLinks('.') |
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463 | 483 | |
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464 | 484 | Out[7]: |
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485 | .. parsed-literal:: | |
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486 | ||
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487 | <IPython.lib.display.FileLinks at 0x10f7eaad0> | |
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488 | ||
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465 | 489 | |
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466 | 490 | External sites |
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467 | 491 | ~~~~~~~~~~~~~~ |
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468 | 492 | |
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469 | 493 | You can even embed an entire page from another site in an iframe; for |
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470 | 494 | example this is today's Wikipedia page for mobile users: |
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471 | 495 | |
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472 | 496 | In[9]: |
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473 | 497 | |
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474 | 498 | .. code:: python |
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475 | 499 | |
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476 | 500 | HTML('<iframe src=http://en.mobile.wikipedia.org/?useformat=mobile width=700 height=350></iframe>') |
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477 | 501 | |
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478 | 502 | Out[9]: |
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503 | .. parsed-literal:: | |
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504 | ||
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505 | <IPython.core.display.HTML at 0x1094900d0> | |
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506 | ||
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479 | 507 | |
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480 | 508 | Mathematics |
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481 | 509 | ~~~~~~~~~~~ |
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482 | 510 | |
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483 | 511 | And we also support the display of mathematical expressions typeset in |
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484 | 512 | LaTeX, which is rendered in the browser thanks to the `MathJax |
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485 | 513 | library <http://mathjax.org>`_. |
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486 | 514 | |
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487 | 515 | Note that this is *different* from the above examples. Above we were |
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488 | 516 | typing mathematical expressions in Markdown cells (along with normal |
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489 | 517 | text) and letting the browser render them; now we are displaying the |
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490 | 518 | output of a Python computation as a LaTeX expression wrapped by the |
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491 | 519 | ``Math()`` object so the browser renders it. The ``Math`` object will |
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492 | 520 | add the needed LaTeX delimiters (``$$``) if they are not provided: |
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493 | 521 | |
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494 | 522 | In[10]: |
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495 | 523 | |
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496 | 524 | .. code:: python |
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497 | 525 | |
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498 | 526 | from IPython.display import Math |
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499 | 527 | Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx') |
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500 | 528 | |
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501 | 529 | Out[10]: |
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502 | 530 | .. math:: |
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503 | 531 | |
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504 | 532 | $$F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx$$ |
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505 | 533 | |
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506 | 534 | |
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507 | 535 | With the ``Latex`` class, you have to include the delimiters yourself. |
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508 | 536 | This allows you to use other LaTeX modes such as ``eqnarray``: |
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509 | 537 | |
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510 | 538 | In[11]: |
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511 | 539 | |
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512 | 540 | .. code:: python |
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513 | 541 | |
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514 | 542 | from IPython.display import Latex |
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515 | 543 | Latex(r"""\begin{eqnarray} |
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516 | 544 | \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\ |
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517 | 545 | \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\ |
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518 | 546 | \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\ |
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519 | 547 | \nabla \cdot \vec{\mathbf{B}} & = 0 |
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520 | 548 | \end{eqnarray}""") |
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521 | 549 | |
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522 | 550 | Out[11]: |
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523 | 551 | .. math:: |
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524 | 552 | |
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525 | 553 | \begin{eqnarray} |
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526 | 554 | \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\ |
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527 | 555 | \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\ |
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528 | 556 | \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\ |
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529 | 557 | \nabla \cdot \vec{\mathbf{B}} & = 0 |
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530 | 558 | \end{eqnarray} |
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531 | 559 | |
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532 | 560 | |
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533 | 561 | Or you can enter latex directly with the ``%%latex`` cell magic: |
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534 | 562 | |
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535 | 563 | In[12]: |
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536 | 564 | |
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537 | 565 | .. code:: python |
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538 | 566 | |
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539 | 567 | %%latex |
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540 | 568 | \begin{aligned} |
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541 | 569 | \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\ |
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542 | 570 | \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\ |
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543 | 571 | \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\ |
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544 | 572 | \nabla \cdot \vec{\mathbf{B}} & = 0 |
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545 | 573 | \end{aligned} |
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546 | 574 | |
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547 | 575 | .. math:: |
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548 | 576 | |
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549 | 577 | \begin{aligned} |
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550 | 578 | \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\ |
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551 | 579 | \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\ |
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552 | 580 | \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\ |
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553 | 581 | \nabla \cdot \vec{\mathbf{B}} & = 0 |
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554 | 582 | \end{aligned} |
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555 | 583 | |
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556 | 584 | There is also a ``%%javascript`` cell magic for running javascript |
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557 | 585 | directly, and ``%%svg`` for manually entering SVG content. |
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558 | 586 | |
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559 | 587 | Loading external codes |
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560 | 588 | ====================== |
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561 | 589 | |
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562 | 590 | - Drag and drop a ``.py`` in the dashboard |
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563 | 591 | - Use ``%load`` with any local or remote url: `the Matplotlib |
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564 | 592 | Gallery! <http://matplotlib.sourceforge.net/gallery.html>`_ |
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565 | 593 | |
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566 | 594 | In this notebook we've kept the output saved so you can see the result, |
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567 | 595 | but you should run the next cell yourself (with an active internet |
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568 | 596 | connection). |
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569 | 597 | |
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570 | 598 | Let's make sure we have pylab again, in case we have restarted the |
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571 | 599 | kernel due to the crash demo above |
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572 | 600 | |
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573 | 601 | In[12]: |
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574 | 602 | |
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575 | 603 | .. code:: python |
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576 | 604 | |
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577 | 605 | %pylab inline |
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578 | 606 | |
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579 | 607 | |
|
580 | 608 | .. parsed-literal:: |
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581 | 609 | |
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582 | 610 | |
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583 | 611 | Welcome to pylab, a matplotlib-based Python environment [backend: module://IPython.zmq.pylab.backend_inline]. |
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584 | 612 | For more information, type 'help(pylab)'. |
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585 | 613 | |
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586 | 614 | In[15]: |
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587 | 615 | |
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588 | 616 | .. code:: python |
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589 | 617 | |
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590 | 618 | %load http://matplotlib.sourceforge.net/mpl_examples/pylab_examples/integral_demo.py |
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591 | 619 | |
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592 | 620 | In[16]: |
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593 | 621 | |
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594 | 622 | .. code:: python |
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595 | 623 | |
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596 | 624 | #!/usr/bin/env python |
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597 | 625 | |
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598 | 626 | # implement the example graphs/integral from pyx |
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599 | 627 | from pylab import * |
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600 | 628 | from matplotlib.patches import Polygon |
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601 | 629 | |
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602 | 630 | def func(x): |
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603 | 631 | return (x-3)*(x-5)*(x-7)+85 |
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604 | 632 | |
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605 | 633 | ax = subplot(111) |
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606 | 634 | |
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607 | 635 | a, b = 2, 9 # integral area |
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608 | 636 | x = arange(0, 10, 0.01) |
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609 | 637 | y = func(x) |
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610 | 638 | plot(x, y, linewidth=1) |
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611 | 639 | |
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612 | 640 | # make the shaded region |
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613 | 641 | ix = arange(a, b, 0.01) |
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614 | 642 | iy = func(ix) |
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615 | 643 | verts = [(a,0)] + zip(ix,iy) + [(b,0)] |
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616 | 644 | poly = Polygon(verts, facecolor='0.8', edgecolor='k') |
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617 | 645 | ax.add_patch(poly) |
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618 | 646 | |
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619 | 647 | text(0.5 * (a + b), 30, |
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620 | 648 | r"$\int_a^b f(x)\mathrm{d}x$", horizontalalignment='center', |
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621 | 649 | fontsize=20) |
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622 | 650 | |
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623 | 651 | axis([0,10, 0, 180]) |
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624 | 652 | figtext(0.9, 0.05, 'x') |
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625 | 653 | figtext(0.1, 0.9, 'y') |
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626 | 654 | ax.set_xticks((a,b)) |
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627 | 655 | ax.set_xticklabels(('a','b')) |
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628 | 656 | ax.set_yticks([]) |
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629 | 657 | show() |
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630 | 658 | |
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631 | 659 | |
|
632 | 660 | .. image:: _fig_60.png |
|
633 |
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