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1 | """A print function that pretty prints sympy Basic objects. |
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1 | """A print function that pretty prints sympy Basic objects. | |
2 |
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2 | |||
3 | Authors: |
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3 | Authors: | |
4 | * Brian Granger |
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4 | * Brian Granger | |
5 | """ |
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5 | """ | |
6 | #----------------------------------------------------------------------------- |
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6 | #----------------------------------------------------------------------------- | |
7 | # Copyright (C) 2008-2011 The IPython Development Team |
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7 | # Copyright (C) 2008-2011 The IPython Development Team | |
8 | # |
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8 | # | |
9 | # Distributed under the terms of the BSD License. The full license is in |
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9 | # Distributed under the terms of the BSD License. The full license is in | |
10 | # the file COPYING, distributed as part of this software. |
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10 | # the file COPYING, distributed as part of this software. | |
11 | #----------------------------------------------------------------------------- |
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11 | #----------------------------------------------------------------------------- | |
12 |
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12 | |||
13 | #----------------------------------------------------------------------------- |
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13 | #----------------------------------------------------------------------------- | |
14 | # Imports |
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14 | # Imports | |
15 | #----------------------------------------------------------------------------- |
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15 | #----------------------------------------------------------------------------- | |
16 |
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16 | |||
17 | from IPython.lib.latextools import latex_to_png |
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17 | from IPython.lib.latextools import latex_to_png | |
18 | from IPython.testing import decorators as dec |
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18 | from IPython.testing import decorators as dec | |
19 | # use @dec.skipif_not_sympy to skip tests requiring sympy |
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19 | # use @dec.skipif_not_sympy to skip tests requiring sympy | |
20 |
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20 | |||
21 | try: |
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21 | try: | |
22 | from sympy import pretty, latex |
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22 | from sympy import pretty, latex | |
23 | except ImportError: |
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23 | except ImportError: | |
24 | pass |
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24 | pass | |
25 |
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25 | |||
26 |
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26 | |||
27 | #----------------------------------------------------------------------------- |
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27 | #----------------------------------------------------------------------------- | |
28 | # Definitions of magic functions for use with IPython |
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28 | # Definitions of magic functions for use with IPython | |
29 | #----------------------------------------------------------------------------- |
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29 | #----------------------------------------------------------------------------- | |
30 |
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30 | |||
31 | def print_basic_unicode(o, p, cycle): |
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31 | def print_basic_unicode(o, p, cycle): | |
32 | """A function to pretty print sympy Basic objects.""" |
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32 | """A function to pretty print sympy Basic objects.""" | |
33 | if cycle: |
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33 | if cycle: | |
34 | return p.text('Basic(...)') |
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34 | return p.text('Basic(...)') | |
35 | out = pretty(o, use_unicode=True) |
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35 | out = pretty(o, use_unicode=True) | |
36 | if '\n' in out: |
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36 | if '\n' in out: | |
37 | p.text(u'\n') |
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37 | p.text(u'\n') | |
38 | p.text(out) |
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38 | p.text(out) | |
39 |
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39 | |||
40 |
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40 | |||
41 | def print_png(o): |
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41 | def print_png(o): | |
42 | """A function to display sympy expression using LaTex -> PNG.""" |
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42 | """A function to display sympy expression using LaTex -> PNG.""" | |
43 | s = latex(o, mode='inline') |
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43 | s = latex(o, mode='inline') | |
44 | # mathtext does not understand certain latex flags, so we try to replace |
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44 | # mathtext does not understand certain latex flags, so we try to replace | |
45 | # them with suitable subs. |
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45 | # them with suitable subs. | |
46 | s = s.replace('\\operatorname','') |
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46 | s = s.replace('\\operatorname','') | |
47 | s = s.replace('\\overline', '\\bar') |
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47 | s = s.replace('\\overline', '\\bar') | |
48 | png = latex_to_png(s) |
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48 | png = latex_to_png(s) | |
49 | return png |
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49 | return png | |
50 |
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50 | |||
51 |
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51 | |||
52 | def print_latex(o): |
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52 | def print_latex(o): | |
53 | """A function to generate the latex representation of sympy expressions.""" |
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53 | """A function to generate the latex representation of sympy expressions.""" | |
54 | s = latex(o, mode='equation', itex=True) |
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54 | s = latex(o, mode='equation', itex=True) | |
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55 | s = s.replace('\\dag','\\dagger') | |||
55 | return s |
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56 | return s | |
56 |
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57 | |||
57 |
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58 | |||
58 | _loaded = False |
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59 | _loaded = False | |
59 |
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60 | |||
60 | def load_ipython_extension(ip): |
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61 | def load_ipython_extension(ip): | |
61 | """Load the extension in IPython.""" |
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62 | """Load the extension in IPython.""" | |
62 | global _loaded |
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63 | global _loaded | |
63 | if not _loaded: |
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64 | if not _loaded: | |
64 | plaintext_formatter = ip.display_formatter.formatters['text/plain'] |
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65 | plaintext_formatter = ip.display_formatter.formatters['text/plain'] | |
65 |
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66 | |||
66 | for cls in (object, tuple, list, set, frozenset, dict, str): |
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67 | for cls in (object, tuple, list, set, frozenset, dict, str): | |
67 | plaintext_formatter.for_type(cls, print_basic_unicode) |
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68 | plaintext_formatter.for_type(cls, print_basic_unicode) | |
68 |
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69 | |||
69 | plaintext_formatter.for_type_by_name( |
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70 | plaintext_formatter.for_type_by_name( | |
70 | 'sympy.core.basic', 'Basic', print_basic_unicode |
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71 | 'sympy.core.basic', 'Basic', print_basic_unicode | |
71 | ) |
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72 | ) | |
72 | plaintext_formatter.for_type_by_name( |
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73 | plaintext_formatter.for_type_by_name( | |
73 | 'sympy.matrices.matrices', 'Matrix', print_basic_unicode |
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74 | 'sympy.matrices.matrices', 'Matrix', print_basic_unicode | |
74 | ) |
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75 | ) | |
75 |
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76 | |||
76 | png_formatter = ip.display_formatter.formatters['image/png'] |
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77 | png_formatter = ip.display_formatter.formatters['image/png'] | |
77 |
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78 | |||
78 | png_formatter.for_type_by_name( |
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79 | png_formatter.for_type_by_name( | |
79 | 'sympy.core.basic', 'Basic', print_png |
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80 | 'sympy.core.basic', 'Basic', print_png | |
80 | ) |
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81 | ) | |
81 |
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82 | |||
82 | latex_formatter = ip.display_formatter.formatters['text/latex'] |
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83 | latex_formatter = ip.display_formatter.formatters['text/latex'] | |
83 | latex_formatter.for_type_by_name( |
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84 | latex_formatter.for_type_by_name( | |
84 | 'sympy.core.basic', 'Basic', print_latex |
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85 | 'sympy.core.basic', 'Basic', print_latex | |
85 | ) |
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86 | ) | |
86 | latex_formatter.for_type_by_name( |
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87 | latex_formatter.for_type_by_name( | |
87 | 'sympy.matrices.matrices', 'Matrix', print_latex |
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88 | 'sympy.matrices.matrices', 'Matrix', print_latex | |
88 | ) |
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89 | ) | |
89 | _loaded = True |
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90 | _loaded = True | |
90 |
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91 |
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