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@@ -1,614 +1,609 b'' | |||
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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """Top-level display functions for displaying object in different formats. |
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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 | * Brian Granger |
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7 | 7 | """ |
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8 | 8 | |
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9 | 9 | #----------------------------------------------------------------------------- |
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10 | 10 | # Copyright (C) 2013 The IPython Development Team |
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11 | 11 | # |
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12 | 12 | # Distributed under the terms of the BSD License. The full license is in |
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13 | 13 | # the file COPYING, distributed as part of this software. |
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14 | 14 | #----------------------------------------------------------------------------- |
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15 | 15 | |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | # Imports |
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18 | 18 | #----------------------------------------------------------------------------- |
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19 | 19 | |
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20 | 20 | from __future__ import print_function |
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21 | 21 | |
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22 | 22 | import os |
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23 | 23 | |
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24 | 24 | from IPython.utils.py3compat import string_types |
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25 | 25 | |
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26 | from .displaypub import publish_display_data | |
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27 | ||
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26 | 28 | #----------------------------------------------------------------------------- |
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27 | 29 | # utility functions |
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28 | 30 | #----------------------------------------------------------------------------- |
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29 | 31 | |
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30 | 32 | def _safe_exists(path): |
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31 | 33 | """Check path, but don't let exceptions raise""" |
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32 | 34 | try: |
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33 | 35 | return os.path.exists(path) |
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34 | 36 | except Exception: |
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35 | 37 | return False |
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36 | 38 | |
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37 | def _publish(data, metadata): | |
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38 | """publish a display message""" | |
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39 | from IPython.core.interactiveshell import InteractiveShell | |
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40 | return InteractiveShell.instance().display_pub.publish( | |
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41 | "display", data, metadata | |
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42 | ) | |
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43 | ||
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44 | 39 | def _merge(d1, d2): |
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45 | 40 | """Like update, but merges sub-dicts instead of clobbering at the top level. |
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46 | 41 | |
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47 | 42 | Updates d1 in-place |
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48 | 43 | """ |
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49 | 44 | |
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50 | 45 | if not isinstance(d2, dict) or not isinstance(d1, dict): |
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51 | 46 | return d2 |
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52 | 47 | for key, value in d2.items(): |
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53 | 48 | d1[key] = _merge(d1.get(key), value) |
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54 | 49 | return d1 |
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55 | 50 | |
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51 | def _display_mimetype(mimetype, objs, raw=False, metadata=None): | |
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52 | """internal implementation of all display_foo methods | |
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53 | ||
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54 | Parameters | |
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55 | ---------- | |
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56 | mimetype : str | |
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57 | The mimetype to be published (e.g. 'image/png') | |
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58 | objs : tuple of objects | |
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59 | The Python objects to display, or if raw=True raw text data to | |
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60 | display. | |
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61 | raw : bool | |
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62 | Are the data objects raw data or Python objects that need to be | |
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63 | formatted before display? [default: False] | |
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64 | metadata : dict (optional) | |
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65 | Metadata to be associated with the output. | |
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66 | """ | |
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67 | if raw: | |
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68 | for obj in objs: | |
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69 | publish_display_data('display', {mimetype : obj}, metadata) | |
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70 | else: | |
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71 | display(*objs, metadata=metadata, include=[mimetype]) | |
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72 | ||
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56 | 73 | #----------------------------------------------------------------------------- |
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57 | 74 | # Main functions |
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58 | 75 | #----------------------------------------------------------------------------- |
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59 | 76 | |
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60 | 77 | def display(*objs, **kwargs): |
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61 | 78 | """Display a Python object in all frontends. |
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62 | 79 | |
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63 | 80 | By default all representations will be computed and sent to the frontends. |
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64 | 81 | Frontends can decide which representation is used and how. |
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65 | 82 | |
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66 | 83 | Parameters |
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67 | 84 | ---------- |
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68 | 85 | objs : tuple of objects |
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69 | 86 | The Python objects to display. |
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70 | 87 | include : list or tuple, optional |
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71 | 88 | A list of format type strings (MIME types) to include in the |
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72 | 89 | format data dict. If this is set *only* the format types included |
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73 | 90 | in this list will be computed. |
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74 | 91 | exclude : list or tuple, optional |
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75 | 92 | A list of format type strings (MIME types) to exclude in the format |
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76 | 93 | data dict. If this is set all format types will be computed, |
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77 | 94 | except for those included in this argument. |
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78 | 95 | metadata : dict, optional |
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79 | 96 | A dictionary of metadata to associate with the output. |
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80 | 97 | mime-type keys in this dictionary will be associated with the individual |
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81 | 98 | representation formats, if they exist. |
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82 | 99 | """ |
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83 | 100 | include = kwargs.get('include') |
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84 | 101 | exclude = kwargs.get('exclude') |
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85 | 102 | metadata = kwargs.get('metadata') |
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86 | 103 | |
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87 | 104 | from IPython.core.interactiveshell import InteractiveShell |
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88 | 105 | format = InteractiveShell.instance().display_formatter.format |
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89 | 106 | |
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90 | 107 | for obj in objs: |
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91 | 108 | format_dict, md_dict = format(obj, include=include, exclude=exclude) |
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92 | 109 | if metadata: |
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93 | 110 | # kwarg-specified metadata gets precedence |
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94 | 111 | _merge(md_dict, metadata) |
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95 |
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96 | ||
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97 | def _display_mimetype(mimetype, objs, raw=False, metadata=None): | |
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98 | """internal implementation of all display_foo methods | |
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112 | publish_display_data('display', format_dict, md_dict) | |
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99 | 113 | |
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100 | Parameters | |
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101 | ---------- | |
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102 | mimetype : str | |
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103 | The mimetype to be published (e.g. 'image/png') | |
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104 | objs : tuple of objects | |
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105 | The Python objects to display, or if raw=True raw text data to | |
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106 | display. | |
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107 | raw : bool | |
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108 | Are the data objects raw data or Python objects that need to be | |
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109 | formatted before display? [default: False] | |
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110 | metadata : dict (optional) | |
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111 | Metadata to be associated with the output. | |
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112 | """ | |
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113 | if raw: | |
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114 | for obj in objs: | |
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115 | _publish({mimetype : obj}, metadata) | |
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116 | else: | |
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117 | display(*objs, metadata=metadata, include=[mimetype]) | |
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118 | ||
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119 | 114 | |
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120 | 115 | def display_pretty(*objs, **kwargs): |
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121 | 116 | """Display the pretty (default) representation of an object. |
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122 | 117 | |
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123 | 118 | Parameters |
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124 | 119 | ---------- |
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125 | 120 | objs : tuple of objects |
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126 | 121 | The Python objects to display, or if raw=True raw text data to |
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127 | 122 | display. |
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128 | 123 | raw : bool |
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129 | 124 | Are the data objects raw data or Python objects that need to be |
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130 | 125 | formatted before display? [default: False] |
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131 | 126 | metadata : dict (optional) |
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132 | 127 | Metadata to be associated with the output. |
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133 | 128 | """ |
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134 | 129 | _display_mimetype('text/plain', objs, **kwargs) |
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135 | 130 | |
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136 | 131 | |
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137 | 132 | def display_html(*objs, **kwargs): |
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138 | 133 | """Display the HTML representation of an object. |
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139 | 134 | |
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140 | 135 | Parameters |
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141 | 136 | ---------- |
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142 | 137 | objs : tuple of objects |
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143 | 138 | The Python objects to display, or if raw=True raw HTML data to |
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144 | 139 | display. |
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145 | 140 | raw : bool |
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146 | 141 | Are the data objects raw data or Python objects that need to be |
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147 | 142 | formatted before display? [default: False] |
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148 | 143 | metadata : dict (optional) |
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149 | 144 | Metadata to be associated with the output. |
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150 | 145 | """ |
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151 | 146 | _display_mimetype('text/html', objs, **kwargs) |
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152 | 147 | |
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153 | 148 | |
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154 | 149 | def display_svg(*objs, **kwargs): |
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155 | 150 | """Display the SVG representation of an object. |
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156 | 151 | |
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157 | 152 | Parameters |
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158 | 153 | ---------- |
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159 | 154 | objs : tuple of objects |
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160 | 155 | The Python objects to display, or if raw=True raw svg data to |
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161 | 156 | display. |
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162 | 157 | raw : bool |
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163 | 158 | Are the data objects raw data or Python objects that need to be |
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164 | 159 | formatted before display? [default: False] |
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165 | 160 | metadata : dict (optional) |
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166 | 161 | Metadata to be associated with the output. |
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167 | 162 | """ |
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168 | 163 | _display_mimetype('image/svg+xml', objs, **kwargs) |
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169 | 164 | |
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170 | 165 | |
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171 | 166 | def display_png(*objs, **kwargs): |
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172 | 167 | """Display the PNG representation of an object. |
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173 | 168 | |
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174 | 169 | Parameters |
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175 | 170 | ---------- |
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176 | 171 | objs : tuple of objects |
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177 | 172 | The Python objects to display, or if raw=True raw png data to |
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178 | 173 | display. |
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179 | 174 | raw : bool |
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180 | 175 | Are the data objects raw data or Python objects that need to be |
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181 | 176 | formatted before display? [default: False] |
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182 | 177 | metadata : dict (optional) |
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183 | 178 | Metadata to be associated with the output. |
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184 | 179 | """ |
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185 | 180 | _display_mimetype('image/png', objs, **kwargs) |
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186 | 181 | |
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187 | 182 | |
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188 | 183 | def display_jpeg(*objs, **kwargs): |
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189 | 184 | """Display the JPEG representation of an object. |
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190 | 185 | |
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191 | 186 | Parameters |
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192 | 187 | ---------- |
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193 | 188 | objs : tuple of objects |
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194 | 189 | The Python objects to display, or if raw=True raw JPEG data to |
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195 | 190 | display. |
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196 | 191 | raw : bool |
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197 | 192 | Are the data objects raw data or Python objects that need to be |
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198 | 193 | formatted before display? [default: False] |
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199 | 194 | metadata : dict (optional) |
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200 | 195 | Metadata to be associated with the output. |
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201 | 196 | """ |
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202 | 197 | _display_mimetype('image/jpeg', objs, **kwargs) |
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203 | 198 | |
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204 | 199 | |
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205 | 200 | def display_latex(*objs, **kwargs): |
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206 | 201 | """Display the LaTeX representation of an object. |
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207 | 202 | |
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208 | 203 | Parameters |
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209 | 204 | ---------- |
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210 | 205 | objs : tuple of objects |
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211 | 206 | The Python objects to display, or if raw=True raw latex data to |
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212 | 207 | display. |
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213 | 208 | raw : bool |
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214 | 209 | Are the data objects raw data or Python objects that need to be |
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215 | 210 | formatted before display? [default: False] |
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216 | 211 | metadata : dict (optional) |
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217 | 212 | Metadata to be associated with the output. |
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218 | 213 | """ |
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219 | 214 | _display_mimetype('text/latex', objs, **kwargs) |
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220 | 215 | |
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221 | 216 | |
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222 | 217 | def display_json(*objs, **kwargs): |
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223 | 218 | """Display the JSON representation of an object. |
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224 | 219 | |
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225 | 220 | Note that not many frontends support displaying JSON. |
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226 | 221 | |
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227 | 222 | Parameters |
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228 | 223 | ---------- |
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229 | 224 | objs : tuple of objects |
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230 | 225 | The Python objects to display, or if raw=True raw json data to |
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231 | 226 | display. |
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232 | 227 | raw : bool |
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233 | 228 | Are the data objects raw data or Python objects that need to be |
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234 | 229 | formatted before display? [default: False] |
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235 | 230 | metadata : dict (optional) |
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236 | 231 | Metadata to be associated with the output. |
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237 | 232 | """ |
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238 | 233 | _display_mimetype('application/json', objs, **kwargs) |
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239 | 234 | |
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240 | 235 | |
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241 | 236 | def display_javascript(*objs, **kwargs): |
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242 | 237 | """Display the Javascript representation of an object. |
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243 | 238 | |
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244 | 239 | Parameters |
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245 | 240 | ---------- |
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246 | 241 | objs : tuple of objects |
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247 | 242 | The Python objects to display, or if raw=True raw javascript data to |
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248 | 243 | display. |
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249 | 244 | raw : bool |
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250 | 245 | Are the data objects raw data or Python objects that need to be |
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251 | 246 | formatted before display? [default: False] |
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252 | 247 | metadata : dict (optional) |
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253 | 248 | Metadata to be associated with the output. |
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254 | 249 | """ |
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255 | 250 | _display_mimetype('application/javascript', objs, **kwargs) |
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256 | 251 | |
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257 | 252 | #----------------------------------------------------------------------------- |
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258 | 253 | # Smart classes |
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259 | 254 | #----------------------------------------------------------------------------- |
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260 | 255 | |
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261 | 256 | |
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262 | 257 | class DisplayObject(object): |
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263 | 258 | """An object that wraps data to be displayed.""" |
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264 | 259 | |
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265 | 260 | _read_flags = 'r' |
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266 | 261 | |
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267 | 262 | def __init__(self, data=None, url=None, filename=None): |
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268 | 263 | """Create a display object given raw data. |
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269 | 264 | |
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270 | 265 | When this object is returned by an expression or passed to the |
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271 | 266 | display function, it will result in the data being displayed |
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272 | 267 | in the frontend. The MIME type of the data should match the |
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273 | 268 | subclasses used, so the Png subclass should be used for 'image/png' |
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274 | 269 | data. If the data is a URL, the data will first be downloaded |
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275 | 270 | and then displayed. If |
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276 | 271 | |
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277 | 272 | Parameters |
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278 | 273 | ---------- |
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279 | 274 | data : unicode, str or bytes |
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280 | 275 | The raw data or a URL or file to load the data from |
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281 | 276 | url : unicode |
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282 | 277 | A URL to download the data from. |
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283 | 278 | filename : unicode |
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284 | 279 | Path to a local file to load the data from. |
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285 | 280 | """ |
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286 | 281 | if data is not None and isinstance(data, string_types): |
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287 | 282 | if data.startswith('http') and url is None: |
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288 | 283 | url = data |
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289 | 284 | filename = None |
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290 | 285 | data = None |
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291 | 286 | elif _safe_exists(data) and filename is None: |
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292 | 287 | url = None |
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293 | 288 | filename = data |
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294 | 289 | data = None |
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295 | 290 | |
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296 | 291 | self.data = data |
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297 | 292 | self.url = url |
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298 | 293 | self.filename = None if filename is None else unicode(filename) |
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299 | 294 | |
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300 | 295 | self.reload() |
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301 | 296 | |
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302 | 297 | def reload(self): |
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303 | 298 | """Reload the raw data from file or URL.""" |
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304 | 299 | if self.filename is not None: |
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305 | 300 | with open(self.filename, self._read_flags) as f: |
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306 | 301 | self.data = f.read() |
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307 | 302 | elif self.url is not None: |
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308 | 303 | try: |
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309 | 304 | import urllib2 |
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310 | 305 | response = urllib2.urlopen(self.url) |
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311 | 306 | self.data = response.read() |
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312 | 307 | # extract encoding from header, if there is one: |
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313 | 308 | encoding = None |
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314 | 309 | for sub in response.headers['content-type'].split(';'): |
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315 | 310 | sub = sub.strip() |
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316 | 311 | if sub.startswith('charset'): |
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317 | 312 | encoding = sub.split('=')[-1].strip() |
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318 | 313 | break |
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319 | 314 | # decode data, if an encoding was specified |
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320 | 315 | if encoding: |
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321 | 316 | self.data = self.data.decode(encoding, 'replace') |
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322 | 317 | except: |
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323 | 318 | self.data = None |
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324 | 319 | |
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325 | 320 | class Pretty(DisplayObject): |
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326 | 321 | |
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327 | 322 | def _repr_pretty_(self): |
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328 | 323 | return self.data |
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329 | 324 | |
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330 | 325 | |
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331 | 326 | class HTML(DisplayObject): |
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332 | 327 | |
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333 | 328 | def _repr_html_(self): |
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334 | 329 | return self.data |
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335 | 330 | |
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336 | 331 | |
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337 | 332 | class Math(DisplayObject): |
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338 | 333 | |
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339 | 334 | def _repr_latex_(self): |
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340 | 335 | s = self.data.strip('$') |
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341 | 336 | return "$$%s$$" % s |
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342 | 337 | |
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343 | 338 | |
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344 | 339 | class Latex(DisplayObject): |
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345 | 340 | |
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346 | 341 | def _repr_latex_(self): |
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347 | 342 | return self.data |
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348 | 343 | |
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349 | 344 | |
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350 | 345 | class SVG(DisplayObject): |
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351 | 346 | |
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352 | 347 | # wrap data in a property, which extracts the <svg> tag, discarding |
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353 | 348 | # document headers |
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354 | 349 | _data = None |
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355 | 350 | |
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356 | 351 | @property |
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357 | 352 | def data(self): |
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358 | 353 | return self._data |
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359 | 354 | |
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360 | 355 | @data.setter |
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361 | 356 | def data(self, svg): |
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362 | 357 | if svg is None: |
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363 | 358 | self._data = None |
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364 | 359 | return |
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365 | 360 | # parse into dom object |
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366 | 361 | from xml.dom import minidom |
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367 | 362 | x = minidom.parseString(svg) |
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368 | 363 | # get svg tag (should be 1) |
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369 | 364 | found_svg = x.getElementsByTagName('svg') |
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370 | 365 | if found_svg: |
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371 | 366 | svg = found_svg[0].toxml() |
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372 | 367 | else: |
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373 | 368 | # fallback on the input, trust the user |
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374 | 369 | # but this is probably an error. |
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375 | 370 | pass |
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376 | 371 | self._data = svg |
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377 | 372 | |
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378 | 373 | def _repr_svg_(self): |
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379 | 374 | return self.data |
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380 | 375 | |
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381 | 376 | |
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382 | 377 | class JSON(DisplayObject): |
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383 | 378 | |
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384 | 379 | def _repr_json_(self): |
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385 | 380 | return self.data |
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386 | 381 | |
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387 | 382 | css_t = """$("head").append($("<link/>").attr({ |
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388 | 383 | rel: "stylesheet", |
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389 | 384 | type: "text/css", |
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390 | 385 | href: "%s" |
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391 | 386 | })); |
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392 | 387 | """ |
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393 | 388 | |
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394 | 389 | lib_t1 = """$.getScript("%s", function () { |
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395 | 390 | """ |
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396 | 391 | lib_t2 = """}); |
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397 | 392 | """ |
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398 | 393 | |
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399 | 394 | class Javascript(DisplayObject): |
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400 | 395 | |
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401 | 396 | def __init__(self, data=None, url=None, filename=None, lib=None, css=None): |
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402 | 397 | """Create a Javascript display object given raw data. |
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403 | 398 | |
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404 | 399 | When this object is returned by an expression or passed to the |
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405 | 400 | display function, it will result in the data being displayed |
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406 | 401 | in the frontend. If the data is a URL, the data will first be |
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407 | 402 | downloaded and then displayed. |
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408 | 403 | |
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409 | 404 | In the Notebook, the containing element will be available as `element`, |
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410 | 405 | and jQuery will be available. The output area starts hidden, so if |
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411 | 406 | the js appends content to `element` that should be visible, then |
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412 | 407 | it must call `container.show()` to unhide the area. |
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413 | 408 | |
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414 | 409 | Parameters |
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415 | 410 | ---------- |
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416 | 411 | data : unicode, str or bytes |
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417 | 412 | The Javascript source code or a URL to download it from. |
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418 | 413 | url : unicode |
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419 | 414 | A URL to download the data from. |
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420 | 415 | filename : unicode |
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421 | 416 | Path to a local file to load the data from. |
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422 | 417 | lib : list or str |
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423 | 418 | A sequence of Javascript library URLs to load asynchronously before |
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424 | 419 | running the source code. The full URLs of the libraries should |
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425 | 420 | be given. A single Javascript library URL can also be given as a |
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426 | 421 | string. |
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427 | 422 | css: : list or str |
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428 | 423 | A sequence of css files to load before running the source code. |
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429 | 424 | The full URLs of the css files should be given. A single css URL |
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430 | 425 | can also be given as a string. |
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431 | 426 | """ |
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432 | 427 | if isinstance(lib, basestring): |
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433 | 428 | lib = [lib] |
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434 | 429 | elif lib is None: |
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435 | 430 | lib = [] |
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436 | 431 | if isinstance(css, basestring): |
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437 | 432 | css = [css] |
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438 | 433 | elif css is None: |
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439 | 434 | css = [] |
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440 | 435 | if not isinstance(lib, (list,tuple)): |
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441 | 436 | raise TypeError('expected sequence, got: %r' % lib) |
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442 | 437 | if not isinstance(css, (list,tuple)): |
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443 | 438 | raise TypeError('expected sequence, got: %r' % css) |
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444 | 439 | self.lib = lib |
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445 | 440 | self.css = css |
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446 | 441 | super(Javascript, self).__init__(data=data, url=url, filename=filename) |
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447 | 442 | |
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448 | 443 | def _repr_javascript_(self): |
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449 | 444 | r = '' |
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450 | 445 | for c in self.css: |
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451 | 446 | r += css_t % c |
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452 | 447 | for l in self.lib: |
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453 | 448 | r += lib_t1 % l |
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454 | 449 | r += self.data |
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455 | 450 | r += lib_t2*len(self.lib) |
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456 | 451 | return r |
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457 | 452 | |
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458 | 453 | # constants for identifying png/jpeg data |
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459 | 454 | _PNG = b'\x89PNG\r\n\x1a\n' |
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460 | 455 | _JPEG = b'\xff\xd8' |
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461 | 456 | |
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462 | 457 | class Image(DisplayObject): |
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463 | 458 | |
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464 | 459 | _read_flags = 'rb' |
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465 | 460 | _FMT_JPEG = u'jpeg' |
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466 | 461 | _FMT_PNG = u'png' |
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467 | 462 | _ACCEPTABLE_EMBEDDINGS = [_FMT_JPEG, _FMT_PNG] |
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468 | 463 | |
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469 | 464 | def __init__(self, data=None, url=None, filename=None, format=u'png', embed=None, width=None, height=None): |
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470 | 465 | """Create a display an PNG/JPEG image given raw data. |
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471 | 466 | |
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472 | 467 | When this object is returned by an expression or passed to the |
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473 | 468 | display function, it will result in the image being displayed |
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474 | 469 | in the frontend. |
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475 | 470 | |
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476 | 471 | Parameters |
|
477 | 472 | ---------- |
|
478 | 473 | data : unicode, str or bytes |
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479 | 474 | The raw data or a URL to download the data from. |
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480 | 475 | url : unicode |
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481 | 476 | A URL to download the data from. |
|
482 | 477 | filename : unicode |
|
483 | 478 | Path to a local file to load the data from. |
|
484 | 479 | format : unicode |
|
485 | 480 | The format of the image data (png/jpeg/jpg). If a filename or URL is given |
|
486 | 481 | for format will be inferred from the filename extension. |
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487 | 482 | embed : bool |
|
488 | 483 | Should the image data be embedded using a data URI (True) or be |
|
489 | 484 | loaded using an <img> tag. Set this to True if you want the image |
|
490 | 485 | to be viewable later with no internet connection in the notebook. |
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491 | 486 | |
|
492 | 487 | Default is `True`, unless the keyword argument `url` is set, then |
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493 | 488 | default value is `False`. |
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494 | 489 | |
|
495 | 490 | Note that QtConsole is not able to display images if `embed` is set to `False` |
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496 | 491 | width : int |
|
497 | 492 | Width to which to constrain the image in html |
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498 | 493 | height : int |
|
499 | 494 | Height to which to constrain the image in html |
|
500 | 495 | |
|
501 | 496 | Examples |
|
502 | 497 | -------- |
|
503 | 498 | # embed implicitly True, works in qtconsole and notebook |
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504 | 499 | Image('http://www.google.fr/images/srpr/logo3w.png') |
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505 | 500 | |
|
506 | 501 | # embed implicitly False, does not works in qtconsole but works in notebook if |
|
507 | 502 | # internet connection available |
|
508 | 503 | Image(url='http://www.google.fr/images/srpr/logo3w.png') |
|
509 | 504 | |
|
510 | 505 | """ |
|
511 | 506 | if filename is not None: |
|
512 | 507 | ext = self._find_ext(filename) |
|
513 | 508 | elif url is not None: |
|
514 | 509 | ext = self._find_ext(url) |
|
515 | 510 | elif data is None: |
|
516 | 511 | raise ValueError("No image data found. Expecting filename, url, or data.") |
|
517 | 512 | elif isinstance(data, string_types) and ( |
|
518 | 513 | data.startswith('http') or _safe_exists(data) |
|
519 | 514 | ): |
|
520 | 515 | ext = self._find_ext(data) |
|
521 | 516 | else: |
|
522 | 517 | ext = None |
|
523 | 518 | |
|
524 | 519 | if ext is not None: |
|
525 | 520 | format = ext.lower() |
|
526 | 521 | if ext == u'jpg' or ext == u'jpeg': |
|
527 | 522 | format = self._FMT_JPEG |
|
528 | 523 | if ext == u'png': |
|
529 | 524 | format = self._FMT_PNG |
|
530 | 525 | elif isinstance(data, bytes) and format == 'png': |
|
531 | 526 | # infer image type from image data header, |
|
532 | 527 | # only if format might not have been specified. |
|
533 | 528 | if data[:2] == _JPEG: |
|
534 | 529 | format = 'jpeg' |
|
535 | 530 | |
|
536 | 531 | self.format = unicode(format).lower() |
|
537 | 532 | self.embed = embed if embed is not None else (url is None) |
|
538 | 533 | |
|
539 | 534 | if self.embed and self.format not in self._ACCEPTABLE_EMBEDDINGS: |
|
540 | 535 | raise ValueError("Cannot embed the '%s' image format" % (self.format)) |
|
541 | 536 | self.width = width |
|
542 | 537 | self.height = height |
|
543 | 538 | super(Image, self).__init__(data=data, url=url, filename=filename) |
|
544 | 539 | |
|
545 | 540 | def reload(self): |
|
546 | 541 | """Reload the raw data from file or URL.""" |
|
547 | 542 | if self.embed: |
|
548 | 543 | super(Image,self).reload() |
|
549 | 544 | |
|
550 | 545 | def _repr_html_(self): |
|
551 | 546 | if not self.embed: |
|
552 | 547 | width = height = '' |
|
553 | 548 | if self.width: |
|
554 | 549 | width = ' width="%d"' % self.width |
|
555 | 550 | if self.height: |
|
556 | 551 | height = ' height="%d"' % self.height |
|
557 | 552 | return u'<img src="%s"%s%s/>' % (self.url, width, height) |
|
558 | 553 | |
|
559 | 554 | def _data_and_metadata(self): |
|
560 | 555 | """shortcut for returning metadata with shape information, if defined""" |
|
561 | 556 | md = {} |
|
562 | 557 | if self.width: |
|
563 | 558 | md['width'] = self.width |
|
564 | 559 | if self.height: |
|
565 | 560 | md['height'] = self.height |
|
566 | 561 | if md: |
|
567 | 562 | return self.data, md |
|
568 | 563 | else: |
|
569 | 564 | return self.data |
|
570 | 565 | |
|
571 | 566 | def _repr_png_(self): |
|
572 | 567 | if self.embed and self.format == u'png': |
|
573 | 568 | return self._data_and_metadata() |
|
574 | 569 | |
|
575 | 570 | def _repr_jpeg_(self): |
|
576 | 571 | if self.embed and (self.format == u'jpeg' or self.format == u'jpg'): |
|
577 | 572 | return self._data_and_metadata() |
|
578 | 573 | |
|
579 | 574 | def _find_ext(self, s): |
|
580 | 575 | return unicode(s.split('.')[-1].lower()) |
|
581 | 576 | |
|
582 | 577 | |
|
583 | 578 | def clear_output(stdout=True, stderr=True, other=True): |
|
584 | 579 | """Clear the output of the current cell receiving output. |
|
585 | 580 | |
|
586 | 581 | Optionally, each of stdout/stderr or other non-stream data (e.g. anything |
|
587 | 582 | produced by display()) can be excluded from the clear event. |
|
588 | 583 | |
|
589 | 584 | By default, everything is cleared. |
|
590 | 585 | |
|
591 | 586 | Parameters |
|
592 | 587 | ---------- |
|
593 | 588 | stdout : bool [default: True] |
|
594 | 589 | Whether to clear stdout. |
|
595 | 590 | stderr : bool [default: True] |
|
596 | 591 | Whether to clear stderr. |
|
597 | 592 | other : bool [default: True] |
|
598 | 593 | Whether to clear everything else that is not stdout/stderr |
|
599 | 594 | (e.g. figures,images,HTML, any result of display()). |
|
600 | 595 | """ |
|
601 | 596 | from IPython.core.interactiveshell import InteractiveShell |
|
602 | 597 | if InteractiveShell.initialized(): |
|
603 | 598 | InteractiveShell.instance().display_pub.clear_output( |
|
604 | 599 | stdout=stdout, stderr=stderr, other=other, |
|
605 | 600 | ) |
|
606 | 601 | else: |
|
607 | 602 | from IPython.utils import io |
|
608 | 603 | if stdout: |
|
609 | 604 | print('\033[2K\r', file=io.stdout, end='') |
|
610 | 605 | io.stdout.flush() |
|
611 | 606 | if stderr: |
|
612 | 607 | print('\033[2K\r', file=io.stderr, end='') |
|
613 | 608 | io.stderr.flush() |
|
614 | 609 |
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