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1 | 1 | # -*- coding: utf-8 -*- |
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2 | 2 | """Tools for coloring text in ANSI terminals. |
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3 | 3 | """ |
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4 | 4 | |
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5 | 5 | #***************************************************************************** |
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6 | 6 | # Copyright (C) 2002-2006 Fernando Perez. <fperez@colorado.edu> |
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7 | 7 | # |
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8 | 8 | # Distributed under the terms of the BSD License. The full license is in |
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9 | 9 | # the file COPYING, distributed as part of this software. |
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10 | 10 | #***************************************************************************** |
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11 | 11 | |
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12 | 12 | __all__ = ['TermColors','InputTermColors','ColorScheme','ColorSchemeTable'] |
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13 | 13 | |
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14 | 14 | import os |
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15 | 15 | |
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16 | 16 | from IPython.utils.ipstruct import Struct |
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17 | 17 | |
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18 | 18 | color_templates = ( |
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19 | 19 | # Dark colors |
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20 | 20 | ("Black" , "0;30"), |
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21 | 21 | ("Red" , "0;31"), |
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22 | 22 | ("Green" , "0;32"), |
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23 | 23 | ("Brown" , "0;33"), |
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24 | 24 | ("Blue" , "0;34"), |
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25 | 25 | ("Purple" , "0;35"), |
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26 | 26 | ("Cyan" , "0;36"), |
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27 | 27 | ("LightGray" , "0;37"), |
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28 | 28 | # Light colors |
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29 | 29 | ("DarkGray" , "1;30"), |
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30 | 30 | ("LightRed" , "1;31"), |
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31 | 31 | ("LightGreen" , "1;32"), |
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32 | 32 | ("Yellow" , "1;33"), |
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33 | 33 | ("LightBlue" , "1;34"), |
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34 | 34 | ("LightPurple" , "1;35"), |
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35 | 35 | ("LightCyan" , "1;36"), |
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36 | 36 | ("White" , "1;37"), |
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37 | 37 | # Blinking colors. Probably should not be used in anything serious. |
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38 | 38 | ("BlinkBlack" , "5;30"), |
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39 | 39 | ("BlinkRed" , "5;31"), |
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40 | 40 | ("BlinkGreen" , "5;32"), |
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41 | 41 | ("BlinkYellow" , "5;33"), |
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42 | 42 | ("BlinkBlue" , "5;34"), |
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43 | 43 | ("BlinkPurple" , "5;35"), |
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44 | 44 | ("BlinkCyan" , "5;36"), |
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45 | 45 | ("BlinkLightGray", "5;37"), |
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46 | 46 | ) |
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47 | 47 | |
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48 | 48 | def make_color_table(in_class): |
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49 | 49 | """Build a set of color attributes in a class. |
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50 | 50 | |
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51 | 51 | Helper function for building the :class:`TermColors` and |
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52 | 52 | :class`InputTermColors`. |
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53 | 53 | """ |
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54 | 54 | for name,value in color_templates: |
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55 | 55 | setattr(in_class,name,in_class._base % value) |
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56 | 56 | |
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57 | 57 | class TermColors: |
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58 | 58 | """Color escape sequences. |
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59 | 59 | |
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60 | 60 | This class defines the escape sequences for all the standard (ANSI?) |
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61 | 61 | colors in terminals. Also defines a NoColor escape which is just the null |
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62 | 62 | string, suitable for defining 'dummy' color schemes in terminals which get |
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63 | 63 | confused by color escapes. |
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64 | 64 | |
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65 | 65 | This class should be used as a mixin for building color schemes.""" |
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66 | 66 | |
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67 | 67 | NoColor = '' # for color schemes in color-less terminals. |
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68 | 68 | Normal = '\033[0m' # Reset normal coloring |
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69 | 69 | _base = '\033[%sm' # Template for all other colors |
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70 | 70 | |
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71 | 71 | # Build the actual color table as a set of class attributes: |
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72 | 72 | make_color_table(TermColors) |
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73 | 73 | |
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74 | 74 | class InputTermColors: |
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75 | 75 | """Color escape sequences for input prompts. |
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76 | 76 | |
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77 | This class is similar to TermColors, but the escapes are wrapped in \001 | |
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78 | and \002 so that readline can properly know the length of each line and | |
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77 | This class is similar to TermColors, but the escapes are wrapped in \\001 | |
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78 | and \\002 so that readline can properly know the length of each line and | |
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79 | 79 | can wrap lines accordingly. Use this class for any colored text which |
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80 | 80 | needs to be used in input prompts, such as in calls to raw_input(). |
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81 | 81 | |
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82 | 82 | This class defines the escape sequences for all the standard (ANSI?) |
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83 | 83 | colors in terminals. Also defines a NoColor escape which is just the null |
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84 | 84 | string, suitable for defining 'dummy' color schemes in terminals which get |
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85 | 85 | confused by color escapes. |
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86 | 86 | |
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87 | 87 | This class should be used as a mixin for building color schemes.""" |
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88 | 88 | |
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89 | 89 | NoColor = '' # for color schemes in color-less terminals. |
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90 | 90 | |
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91 | 91 | if os.name == 'nt' and os.environ.get('TERM','dumb') == 'emacs': |
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92 | 92 | # (X)emacs on W32 gets confused with \001 and \002 so we remove them |
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93 | 93 | Normal = '\033[0m' # Reset normal coloring |
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94 | 94 | _base = '\033[%sm' # Template for all other colors |
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95 | 95 | else: |
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96 | 96 | Normal = '\001\033[0m\002' # Reset normal coloring |
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97 | 97 | _base = '\001\033[%sm\002' # Template for all other colors |
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98 | 98 | |
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99 | 99 | # Build the actual color table as a set of class attributes: |
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100 | 100 | make_color_table(InputTermColors) |
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101 | 101 | |
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102 | 102 | class NoColors: |
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103 | 103 | """This defines all the same names as the colour classes, but maps them to |
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104 | 104 | empty strings, so it can easily be substituted to turn off colours.""" |
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105 | 105 | NoColor = '' |
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106 | 106 | Normal = '' |
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107 | 107 | |
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108 | 108 | for name, value in color_templates: |
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109 | 109 | setattr(NoColors, name, '') |
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110 | 110 | |
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111 | 111 | class ColorScheme: |
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112 | 112 | """Generic color scheme class. Just a name and a Struct.""" |
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113 | 113 | def __init__(self,__scheme_name_,colordict=None,**colormap): |
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114 | 114 | self.name = __scheme_name_ |
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115 | 115 | if colordict is None: |
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116 | 116 | self.colors = Struct(**colormap) |
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117 | 117 | else: |
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118 | 118 | self.colors = Struct(colordict) |
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119 | 119 | |
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120 | 120 | def copy(self,name=None): |
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121 | 121 | """Return a full copy of the object, optionally renaming it.""" |
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122 | 122 | if name is None: |
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123 | 123 | name = self.name |
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124 | 124 | return ColorScheme(name, self.colors.dict()) |
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125 | 125 | |
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126 | 126 | class ColorSchemeTable(dict): |
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127 | 127 | """General class to handle tables of color schemes. |
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128 | 128 | |
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129 | 129 | It's basically a dict of color schemes with a couple of shorthand |
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130 | 130 | attributes and some convenient methods. |
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131 | 131 | |
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132 | 132 | active_scheme_name -> obvious |
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133 | 133 | active_colors -> actual color table of the active scheme""" |
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134 | 134 | |
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135 | 135 | def __init__(self, scheme_list=None, default_scheme=''): |
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136 | 136 | """Create a table of color schemes. |
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137 | 137 | |
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138 | 138 | The table can be created empty and manually filled or it can be |
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139 | 139 | created with a list of valid color schemes AND the specification for |
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140 | 140 | the default active scheme. |
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141 | 141 | """ |
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142 | 142 | |
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143 | 143 | # create object attributes to be set later |
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144 | 144 | self.active_scheme_name = '' |
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145 | 145 | self.active_colors = None |
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146 | 146 | |
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147 | 147 | if scheme_list: |
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148 | 148 | if default_scheme == '': |
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149 | 149 | raise ValueError('you must specify the default color scheme') |
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150 | 150 | for scheme in scheme_list: |
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151 | 151 | self.add_scheme(scheme) |
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152 | 152 | self.set_active_scheme(default_scheme) |
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153 | 153 | |
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154 | 154 | def copy(self): |
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155 | 155 | """Return full copy of object""" |
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156 | 156 | return ColorSchemeTable(self.values(),self.active_scheme_name) |
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157 | 157 | |
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158 | 158 | def add_scheme(self,new_scheme): |
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159 | 159 | """Add a new color scheme to the table.""" |
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160 | 160 | if not isinstance(new_scheme,ColorScheme): |
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161 | 161 | raise ValueError('ColorSchemeTable only accepts ColorScheme instances') |
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162 | 162 | self[new_scheme.name] = new_scheme |
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163 | 163 | |
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164 | 164 | def set_active_scheme(self,scheme,case_sensitive=0): |
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165 | 165 | """Set the currently active scheme. |
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166 | 166 | |
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167 | 167 | Names are by default compared in a case-insensitive way, but this can |
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168 | 168 | be changed by setting the parameter case_sensitive to true.""" |
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169 | 169 | |
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170 | 170 | scheme_names = list(self.keys()) |
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171 | 171 | if case_sensitive: |
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172 | 172 | valid_schemes = scheme_names |
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173 | 173 | scheme_test = scheme |
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174 | 174 | else: |
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175 | 175 | valid_schemes = [s.lower() for s in scheme_names] |
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176 | 176 | scheme_test = scheme.lower() |
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177 | 177 | try: |
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178 | 178 | scheme_idx = valid_schemes.index(scheme_test) |
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179 | 179 | except ValueError as e: |
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180 | 180 | raise ValueError('Unrecognized color scheme: ' + scheme + \ |
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181 | 181 | '\nValid schemes: '+str(scheme_names).replace("'', ",'')) from e |
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182 | 182 | else: |
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183 | 183 | active = scheme_names[scheme_idx] |
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184 | 184 | self.active_scheme_name = active |
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185 | 185 | self.active_colors = self[active].colors |
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186 | 186 | # Now allow using '' as an index for the current active scheme |
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187 | 187 | self[''] = self[active] |
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