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@@ -1,309 +1,323 b'' | |||
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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """Pylab (matplotlib) support utilities. |
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3 | 3 | |
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4 | 4 | Authors |
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5 | 5 | ------- |
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6 | 6 | |
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7 | 7 | * Fernando Perez. |
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8 | 8 | * Brian Granger |
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9 | 9 | """ |
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10 | 10 | |
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11 | 11 | #----------------------------------------------------------------------------- |
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12 | 12 | # Copyright (C) 2009 The IPython Development Team |
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13 | 13 | # |
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14 | 14 | # Distributed under the terms of the BSD License. The full license is in |
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15 | 15 | # the file COPYING, distributed as part of this software. |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | |
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18 | 18 | #----------------------------------------------------------------------------- |
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19 | 19 | # Imports |
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20 | 20 | #----------------------------------------------------------------------------- |
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21 | 21 | |
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22 | 22 | from cStringIO import StringIO |
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23 | 23 | |
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24 | 24 | from IPython.utils.decorators import flag_calls |
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25 | 25 | |
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26 | 26 | # If user specifies a GUI, that dictates the backend, otherwise we read the |
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27 | 27 | # user's mpl default from the mpl rc structure |
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28 | 28 | backends = {'tk': 'TkAgg', |
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29 | 29 | 'gtk': 'GTKAgg', |
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30 | 30 | 'wx': 'WXAgg', |
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31 | 31 | 'qt': 'Qt4Agg', # qt3 not supported |
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32 | 32 | 'qt4': 'Qt4Agg', |
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33 | 33 | 'osx': 'MacOSX', |
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34 | 34 | 'inline' : 'module://IPython.zmq.pylab.backend_inline'} |
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35 | 35 | |
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36 | 36 | # We also need a reverse backends2guis mapping that will properly choose which |
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37 | 37 | # GUI support to activate based on the desired matplotlib backend. For the |
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38 | 38 | # most part it's just a reverse of the above dict, but we also need to add a |
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39 | 39 | # few others that map to the same GUI manually: |
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40 | 40 | backend2gui = dict(zip(backends.values(), backends.keys())) |
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41 | 41 | # In the reverse mapping, there are a few extra valid matplotlib backends that |
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42 | 42 | # map to the same GUI support |
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43 | 43 | backend2gui['GTK'] = backend2gui['GTKCairo'] = 'gtk' |
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44 | 44 | backend2gui['WX'] = 'wx' |
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45 | 45 | backend2gui['CocoaAgg'] = 'osx' |
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46 | 46 | |
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47 | 47 | #----------------------------------------------------------------------------- |
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48 | 48 | # Matplotlib utilities |
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49 | 49 | #----------------------------------------------------------------------------- |
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50 | 50 | |
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51 | 51 | |
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52 | 52 | def getfigs(*fig_nums): |
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53 | 53 | """Get a list of matplotlib figures by figure numbers. |
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54 | 54 | |
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55 | 55 | If no arguments are given, all available figures are returned. If the |
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56 | 56 | argument list contains references to invalid figures, a warning is printed |
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57 | 57 | but the function continues pasting further figures. |
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58 | 58 | |
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59 | 59 | Parameters |
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60 | 60 | ---------- |
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61 | 61 | figs : tuple |
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62 | 62 | A tuple of ints giving the figure numbers of the figures to return. |
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63 | 63 | """ |
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64 | 64 | from matplotlib._pylab_helpers import Gcf |
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65 | 65 | if not fig_nums: |
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66 | 66 | fig_managers = Gcf.get_all_fig_managers() |
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67 | 67 | return [fm.canvas.figure for fm in fig_managers] |
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68 | 68 | else: |
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69 | 69 | figs = [] |
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70 | 70 | for num in fig_nums: |
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71 | 71 | f = Gcf.figs.get(num) |
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72 | 72 | if f is None: |
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73 | 73 | print('Warning: figure %s not available.' % num) |
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74 | 74 | else: |
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75 | 75 | figs.append(f.canvas.figure) |
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76 | 76 | return figs |
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77 | 77 | |
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78 | 78 | |
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79 | 79 | def figsize(sizex, sizey): |
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80 | 80 | """Set the default figure size to be [sizex, sizey]. |
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81 | 81 | |
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82 | 82 | This is just an easy to remember, convenience wrapper that sets:: |
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83 | 83 | |
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84 | 84 | matplotlib.rcParams['figure.figsize'] = [sizex, sizey] |
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85 | 85 | """ |
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86 | 86 | import matplotlib |
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87 | 87 | matplotlib.rcParams['figure.figsize'] = [sizex, sizey] |
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88 | 88 | |
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89 | 89 | |
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90 | def figure_to_svg(fig): | |
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91 | """Convert a figure to svg for inline display.""" | |
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90 | def print_figure(fig, fmt='png'): | |
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91 | """Convert a figure to svg or png for inline display.""" | |
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92 | 92 | # When there's an empty figure, we shouldn't return anything, otherwise we |
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93 | 93 | # get big blank areas in the qt console. |
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94 | 94 | if not fig.axes: |
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95 | 95 | return |
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96 | 96 | |
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97 | 97 | fc = fig.get_facecolor() |
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98 | 98 | ec = fig.get_edgecolor() |
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99 | 99 | fig.set_facecolor('white') |
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100 | 100 | fig.set_edgecolor('white') |
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101 | 101 | try: |
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102 | 102 | string_io = StringIO() |
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103 | fig.canvas.print_figure(string_io, format='svg') | |
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104 | svg = string_io.getvalue() | |
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103 | # use 72 dpi to match QTConsole's dpi | |
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104 | fig.canvas.print_figure(string_io, format=fmt, dpi=72) | |
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105 | data = string_io.getvalue() | |
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105 | 106 | finally: |
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106 | 107 | fig.set_facecolor(fc) |
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107 | 108 | fig.set_edgecolor(ec) |
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108 | return svg | |
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109 | if fmt == 'png': | |
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110 | data = data.encode('base64') | |
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111 | return data | |
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109 | 112 | |
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110 | 113 | |
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111 | 114 | # We need a little factory function here to create the closure where |
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112 | 115 | # safe_execfile can live. |
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113 | 116 | def mpl_runner(safe_execfile): |
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114 | 117 | """Factory to return a matplotlib-enabled runner for %run. |
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115 | 118 | |
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116 | 119 | Parameters |
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117 | 120 | ---------- |
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118 | 121 | safe_execfile : function |
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119 | 122 | This must be a function with the same interface as the |
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120 | 123 | :meth:`safe_execfile` method of IPython. |
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121 | 124 | |
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122 | 125 | Returns |
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123 | 126 | ------- |
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124 | 127 | A function suitable for use as the ``runner`` argument of the %run magic |
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125 | 128 | function. |
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126 | 129 | """ |
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127 | 130 | |
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128 | 131 | def mpl_execfile(fname,*where,**kw): |
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129 | 132 | """matplotlib-aware wrapper around safe_execfile. |
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130 | 133 | |
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131 | 134 | Its interface is identical to that of the :func:`execfile` builtin. |
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132 | 135 | |
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133 | 136 | This is ultimately a call to execfile(), but wrapped in safeties to |
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134 | 137 | properly handle interactive rendering.""" |
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135 | 138 | |
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136 | 139 | import matplotlib |
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137 | 140 | import matplotlib.pylab as pylab |
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138 | 141 | |
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139 | 142 | #print '*** Matplotlib runner ***' # dbg |
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140 | 143 | # turn off rendering until end of script |
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141 | 144 | is_interactive = matplotlib.rcParams['interactive'] |
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142 | 145 | matplotlib.interactive(False) |
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143 | 146 | safe_execfile(fname,*where,**kw) |
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144 | 147 | matplotlib.interactive(is_interactive) |
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145 | 148 | # make rendering call now, if the user tried to do it |
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146 | 149 | if pylab.draw_if_interactive.called: |
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147 | 150 | pylab.draw() |
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148 | 151 | pylab.draw_if_interactive.called = False |
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149 | 152 | |
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150 | 153 | return mpl_execfile |
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151 | 154 | |
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152 | 155 | |
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156 | def select_figure_format(shell, fmt): | |
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157 | """Select figure format for inline backend, either 'png' or 'svg'. | |
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158 | ||
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159 | Using this method ensures only one figure format is active at a time. | |
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160 | """ | |
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161 | from matplotlib.figure import Figure | |
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162 | from IPython.zmq.pylab import backend_inline | |
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163 | ||
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164 | svg_formatter = shell.display_formatter.formatters['image/svg+xml'] | |
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165 | png_formatter = shell.display_formatter.formatters['image/png'] | |
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166 | ||
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167 | if fmt=='png': | |
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168 | svg_formatter.type_printers.pop(Figure, None) | |
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169 | png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png')) | |
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170 | elif fmt=='svg': | |
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171 | png_formatter.type_printers.pop(Figure, None) | |
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172 | svg_formatter.for_type(Figure, lambda fig: print_figure(fig, 'svg')) | |
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173 | else: | |
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174 | raise ValueError("supported formats are: 'png', 'svg', not %r"%fmt) | |
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175 | ||
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176 | # set the format to be used in the backend() | |
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177 | backend_inline._figure_format = fmt | |
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178 | ||
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153 | 179 | #----------------------------------------------------------------------------- |
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154 | 180 | # Code for initializing matplotlib and importing pylab |
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155 | 181 | #----------------------------------------------------------------------------- |
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156 | 182 | |
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157 | 183 | |
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158 | 184 | def find_gui_and_backend(gui=None): |
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159 | 185 | """Given a gui string return the gui and mpl backend. |
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160 | 186 | |
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161 | 187 | Parameters |
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162 | 188 | ---------- |
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163 | 189 | gui : str |
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164 | 190 | Can be one of ('tk','gtk','wx','qt','qt4','inline'). |
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165 | 191 | |
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166 | 192 | Returns |
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167 | 193 | ------- |
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168 | 194 | A tuple of (gui, backend) where backend is one of ('TkAgg','GTKAgg', |
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169 | 195 | 'WXAgg','Qt4Agg','module://IPython.zmq.pylab.backend_inline'). |
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170 | 196 | """ |
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171 | 197 | |
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172 | 198 | import matplotlib |
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173 | 199 | |
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174 | 200 | if gui: |
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175 | 201 | # select backend based on requested gui |
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176 | 202 | backend = backends[gui] |
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177 | 203 | else: |
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178 | 204 | backend = matplotlib.rcParams['backend'] |
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179 | 205 | # In this case, we need to find what the appropriate gui selection call |
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180 | 206 | # should be for IPython, so we can activate inputhook accordingly |
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181 | 207 | gui = backend2gui.get(backend, None) |
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182 | 208 | return gui, backend |
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183 | 209 | |
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184 | 210 | |
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185 | 211 | def activate_matplotlib(backend): |
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186 | 212 | """Activate the given backend and set interactive to True.""" |
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187 | 213 | |
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188 | 214 | import matplotlib |
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189 | 215 | if backend.startswith('module://'): |
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190 | 216 | # Work around bug in matplotlib: matplotlib.use converts the |
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191 | 217 | # backend_id to lowercase even if a module name is specified! |
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192 | 218 | matplotlib.rcParams['backend'] = backend |
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193 | 219 | else: |
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194 | 220 | matplotlib.use(backend) |
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195 | 221 | matplotlib.interactive(True) |
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196 | 222 | |
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197 | 223 | # This must be imported last in the matplotlib series, after |
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198 | 224 | # backend/interactivity choices have been made |
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199 | 225 | import matplotlib.pylab as pylab |
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200 | 226 | |
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201 | 227 | # XXX For now leave this commented out, but depending on discussions with |
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202 | 228 | # mpl-dev, we may be able to allow interactive switching... |
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203 | 229 | #import matplotlib.pyplot |
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204 | 230 | #matplotlib.pyplot.switch_backend(backend) |
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205 | 231 | |
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206 | 232 | pylab.show._needmain = False |
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207 | 233 | # We need to detect at runtime whether show() is called by the user. |
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208 | 234 | # For this, we wrap it into a decorator which adds a 'called' flag. |
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209 | 235 | pylab.draw_if_interactive = flag_calls(pylab.draw_if_interactive) |
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210 | 236 | |
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211 | ||
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212 | 237 | def import_pylab(user_ns, backend, import_all=True, shell=None): |
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213 | 238 | """Import the standard pylab symbols into user_ns.""" |
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214 | 239 | |
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215 | 240 | # Import numpy as np/pyplot as plt are conventions we're trying to |
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216 | 241 | # somewhat standardize on. Making them available to users by default |
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217 | 242 | # will greatly help this. |
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218 | 243 | s = ("import numpy\n" |
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219 | 244 | "import matplotlib\n" |
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220 | 245 | "from matplotlib import pylab, mlab, pyplot\n" |
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221 | 246 | "np = numpy\n" |
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222 | 247 | "plt = pyplot\n" |
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223 | 248 | ) |
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224 | 249 | exec s in user_ns |
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225 | 250 | |
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226 | 251 | if shell is not None: |
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227 | 252 | exec s in shell.user_ns_hidden |
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228 | 253 | # If using our svg payload backend, register the post-execution |
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229 | 254 | # function that will pick up the results for display. This can only be |
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230 | 255 | # done with access to the real shell object. |
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256 | # | |
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257 | from IPython.zmq.pylab.backend_inline import InlineBackendConfig | |
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258 | ||
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259 | cfg = InlineBackendConfig.instance(config=shell.config) | |
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260 | cfg.shell = shell | |
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261 | ||
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231 | 262 | if backend == backends['inline']: |
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232 |
from IPython.zmq.pylab.backend_inline import flush_ |
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263 | from IPython.zmq.pylab.backend_inline import flush_figures | |
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233 | 264 | from matplotlib import pyplot |
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234 |
shell.register_post_execute(flush_ |
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235 | # The typical default figure size is too large for inline use, | |
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236 | # so we shrink the figure size to 6x4, and tweak fonts to | |
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237 | # make that fit. This is configurable via Global.pylab_inline_rc, | |
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238 | # or rather it will be once the zmq kernel is hooked up to | |
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239 | # the config system. | |
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240 | ||
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241 | default_rc = { | |
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242 | 'figure.figsize': (6.0,4.0), | |
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243 | # 12pt labels get cutoff on 6x4 logplots, so use 10pt. | |
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244 | 'font.size': 10, | |
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245 | # 10pt still needs a little more room on the xlabel: | |
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246 | 'figure.subplot.bottom' : .125 | |
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247 | } | |
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248 | rc = getattr(shell.config.Global, 'pylab_inline_rc', default_rc) | |
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249 | pyplot.rcParams.update(rc) | |
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250 | shell.config.Global.pylab_inline_rc = rc | |
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265 | shell.register_post_execute(flush_figures) | |
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266 | # load inline_rc | |
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267 | pyplot.rcParams.update(cfg.rc) | |
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251 | 268 | |
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252 | 269 | # Add 'figsize' to pyplot and to the user's namespace |
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253 | 270 | user_ns['figsize'] = pyplot.figsize = figsize |
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254 | 271 | shell.user_ns_hidden['figsize'] = figsize |
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255 | 272 | |
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273 | # Setup the default figure format | |
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274 | fmt = cfg.figure_format | |
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275 | select_figure_format(shell, fmt) | |
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276 | ||
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256 | 277 | # The old pastefig function has been replaced by display |
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257 | # Always add this svg formatter so display works. | |
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258 | from IPython.core.display import display, display_svg | |
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259 | svg_formatter = shell.display_formatter.formatters['image/svg+xml'] | |
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260 | svg_formatter.for_type_by_name( | |
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261 | 'matplotlib.figure','Figure',figure_to_svg | |
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262 | ) | |
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278 | from IPython.core.display import display | |
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263 | 279 | # Add display and display_png to the user's namespace |
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264 | 280 | user_ns['display'] = display |
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265 | 281 | shell.user_ns_hidden['display'] = display |
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266 | user_ns['display_svg'] = display_svg | |
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267 | shell.user_ns_hidden['display_svg'] = display_svg | |
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268 | 282 | user_ns['getfigs'] = getfigs |
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269 | 283 | shell.user_ns_hidden['getfigs'] = getfigs |
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270 | 284 | |
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271 | 285 | if import_all: |
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272 | 286 | s = ("from matplotlib.pylab import *\n" |
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273 | 287 | "from numpy import *\n") |
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274 | 288 | exec s in user_ns |
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275 | 289 | if shell is not None: |
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276 | 290 | exec s in shell.user_ns_hidden |
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277 | 291 | |
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278 | 292 | |
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279 | 293 | def pylab_activate(user_ns, gui=None, import_all=True): |
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280 | 294 | """Activate pylab mode in the user's namespace. |
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281 | 295 | |
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282 | 296 | Loads and initializes numpy, matplotlib and friends for interactive use. |
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283 | 297 | |
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284 | 298 | Parameters |
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285 | 299 | ---------- |
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286 | 300 | user_ns : dict |
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287 | 301 | Namespace where the imports will occur. |
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288 | 302 | |
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289 | 303 | gui : optional, string |
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290 | 304 | A valid gui name following the conventions of the %gui magic. |
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291 | 305 | |
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292 | 306 | import_all : optional, boolean |
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293 | 307 | If true, an 'import *' is done from numpy and pylab. |
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294 | 308 | |
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295 | 309 | Returns |
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296 | 310 | ------- |
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297 | 311 | The actual gui used (if not given as input, it was obtained from matplotlib |
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298 | 312 | itself, and will be needed next to configure IPython's gui integration. |
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299 | 313 | """ |
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300 | 314 | gui, backend = find_gui_and_backend(gui) |
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301 | 315 | activate_matplotlib(backend) |
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302 | 316 | import_pylab(user_ns, backend) |
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303 | 317 | |
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304 | 318 | print """ |
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305 | 319 | Welcome to pylab, a matplotlib-based Python environment [backend: %s]. |
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306 | 320 | For more information, type 'help(pylab)'.""" % backend |
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307 | 321 | |
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308 | 322 | return gui |
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309 | 323 |
@@ -1,81 +1,117 b'' | |||
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1 | 1 | """Produce SVG versions of active plots for display by the rich Qt frontend. |
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2 | 2 | """ |
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3 | 3 | #----------------------------------------------------------------------------- |
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4 | 4 | # Imports |
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5 | 5 | #----------------------------------------------------------------------------- |
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6 | 6 | from __future__ import print_function |
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7 | 7 | |
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8 | 8 | # Standard library imports |
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9 | 9 | import sys |
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10 | 10 | |
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11 | 11 | # Third-party imports |
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12 | 12 | import matplotlib |
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13 |
from matplotlib.backends.backend_ |
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13 | from matplotlib.backends.backend_agg import new_figure_manager | |
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14 | 14 | from matplotlib._pylab_helpers import Gcf |
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15 | 15 | |
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16 | 16 | # Local imports. |
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17 | from IPython.config.configurable import SingletonConfigurable | |
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17 | 18 | from IPython.core.displaypub import publish_display_data |
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18 |
from IPython.lib.pylabtools import figure |
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19 | from IPython.lib.pylabtools import print_figure, select_figure_format | |
|
20 | from IPython.utils.traitlets import Dict, Instance, CaselessStrEnum | |
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21 | #----------------------------------------------------------------------------- | |
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22 | # Configurable for inline backend options | |
|
23 | #----------------------------------------------------------------------------- | |
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24 | ||
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25 | class InlineBackendConfig(SingletonConfigurable): | |
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26 | """An object to store configuration of the inline backend.""" | |
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27 | ||
|
28 | # The typical default figure size is too large for inline use, | |
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29 | # so we shrink the figure size to 6x4, and tweak fonts to | |
|
30 | # make that fit. This is configurable via Global.pylab_inline_rc, | |
|
31 | # or rather it will be once the zmq kernel is hooked up to | |
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32 | # the config system. | |
|
33 | rc = Dict({'figure.figsize': (6.0,4.0), | |
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34 | # 12pt labels get cutoff on 6x4 logplots, so use 10pt. | |
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35 | 'font.size': 10, | |
|
36 | # 10pt still needs a little more room on the xlabel: | |
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37 | 'figure.subplot.bottom' : .125 | |
|
38 | }, config=True, | |
|
39 | help="""Subset of matplotlib rcParams that should be different for the | |
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40 | inline backend.""" | |
|
41 | ) | |
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42 | figure_format = CaselessStrEnum(['svg', 'png'], default_value='png', config=True, | |
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43 | help="The image format for figures with the inline backend.") | |
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44 | ||
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45 | def _format_changed(self, name, old, new): | |
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46 | if self.shell is None: | |
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47 | return | |
|
48 | else: | |
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49 | select_figure_format(self.shell, new) | |
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50 | ||
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51 | shell = Instance('IPython.core.interactiveshell.InteractiveShellABC') | |
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52 | ||
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19 | 53 | |
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20 | 54 | #----------------------------------------------------------------------------- |
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21 | 55 | # Functions |
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22 | 56 | #----------------------------------------------------------------------------- |
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23 | 57 | |
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24 | 58 | def show(close=True): |
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25 | 59 | """Show all figures as SVG payloads sent to the IPython clients. |
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26 | 60 | |
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27 | 61 | Parameters |
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28 | 62 | ---------- |
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29 | 63 | close : bool, optional |
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30 | 64 | If true, a ``plt.close('all')`` call is automatically issued after |
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31 | 65 | sending all the SVG figures. If this is set, the figures will entirely |
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32 | 66 | removed from the internal list of figures. |
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33 | 67 | """ |
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34 | 68 | for figure_manager in Gcf.get_all_fig_managers(): |
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35 |
send_ |
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69 | send_figure(figure_manager.canvas.figure) | |
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36 | 70 | if close: |
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37 | 71 | matplotlib.pyplot.close('all') |
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38 | 72 | |
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39 | 73 | |
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40 | 74 | # This flag will be reset by draw_if_interactive when called |
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41 | 75 | show._draw_called = False |
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42 | 76 | |
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43 | 77 | |
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44 | 78 | def draw_if_interactive(): |
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45 | 79 | """ |
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46 | 80 | Is called after every pylab drawing command |
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47 | 81 | """ |
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48 | 82 | # We simply flag we were called and otherwise do nothing. At the end of |
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49 | 83 | # the code execution, a separate call to show_close() will act upon this. |
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50 | 84 | show._draw_called = True |
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51 | 85 | |
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52 | 86 | |
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53 |
def flush_ |
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54 |
"""Call show, close all open figures, sending all |
|
|
87 | def flush_figures(): | |
|
88 | """Call show, close all open figures, sending all figure images. | |
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55 | 89 | |
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56 | 90 | This is meant to be called automatically and will call show() if, during |
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57 | 91 | prior code execution, there had been any calls to draw_if_interactive. |
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58 | 92 | """ |
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59 | 93 | if show._draw_called: |
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60 | 94 | show() |
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61 | 95 | show._draw_called = False |
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62 | 96 | |
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63 | 97 | |
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64 |
def send_ |
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65 |
"""Draw the current figure and send it as a |
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98 | def send_figure(fig): | |
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99 | """Draw the current figure and send it as a PNG payload. | |
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66 | 100 | """ |
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67 | 101 | # For an empty figure, don't even bother calling figure_to_svg, to avoid |
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68 | 102 | # big blank spaces in the qt console |
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69 | 103 | if not fig.axes: |
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70 | 104 | return |
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71 | ||
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72 | svg = figure_to_svg(fig) | |
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105 | fmt = InlineBackendConfig.instance().figure_format | |
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106 | data = print_figure(fig, fmt) | |
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107 | mimetypes = { 'png' : 'image/png', 'svg' : 'image/svg+xml' } | |
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108 | mime = mimetypes[fmt] | |
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73 | 109 | # flush text streams before sending figures, helps a little with output |
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74 | 110 | # synchronization in the console (though it's a bandaid, not a real sln) |
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75 | 111 | sys.stdout.flush(); sys.stderr.flush() |
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76 | 112 | publish_display_data( |
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77 |
'IPython.zmq.pylab.backend_inline.send_ |
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113 | 'IPython.zmq.pylab.backend_inline.send_figure', | |
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78 | 114 | 'Matplotlib Plot', |
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79 |
{ |
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115 | {mime : data} | |
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80 | 116 | ) |
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81 | 117 |
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