Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/dot_parser.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Graphviz's dot language parser. |
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2 |
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3 The dotparser parses GraphViz files in |
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4 dot and dot files and transforms them |
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5 into a class representation defined by `pydot`. |
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6 |
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7 Author: Michael Krause <michael@krause-software.de> |
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8 Fixes by: Ero Carrera <ero.carrera@gmail.com> |
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9 """ |
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10 from __future__ import division |
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11 from __future__ import print_function |
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12 import sys |
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13 |
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14 from pyparsing import ( |
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15 nestedExpr, Literal, CaselessLiteral, |
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16 Word, OneOrMore, |
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17 Forward, |
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18 Group, Optional, Combine, |
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19 restOfLine, cStyleComment, nums, alphanums, |
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20 printables, |
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21 ParseException, ParseResults, CharsNotIn, |
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22 QuotedString) |
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23 |
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24 import pydot |
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25 |
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26 __author__ = ['Michael Krause', 'Ero Carrera'] |
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27 __license__ = 'MIT' |
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28 |
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29 |
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30 PY3 = sys.version_info >= (3, 0, 0) |
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31 if PY3: |
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32 str_type = str |
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33 else: |
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34 str_type = basestring |
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35 |
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36 |
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37 class P_AttrList(object): |
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38 |
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39 def __init__(self, toks): |
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40 |
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41 self.attrs = {} |
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42 i = 0 |
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43 |
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44 while i < len(toks): |
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45 attrname = toks[i] |
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46 if i+2 < len(toks) and toks[i+1] == '=': |
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47 attrvalue = toks[i+2] |
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48 i += 3 |
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49 else: |
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50 attrvalue = None |
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51 i += 1 |
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52 |
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53 self.attrs[attrname] = attrvalue |
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54 |
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55 |
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56 def __repr__(self): |
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57 |
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58 return "%s(%r)" % (self.__class__.__name__, self.attrs) |
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59 |
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60 |
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61 |
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62 class DefaultStatement(P_AttrList): |
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63 |
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64 def __init__(self, default_type, attrs): |
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65 |
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66 self.default_type = default_type |
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67 self.attrs = attrs |
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68 |
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69 def __repr__(self): |
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70 |
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71 return "%s(%s, %r)" % (self.__class__.__name__, |
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72 self.default_type, self.attrs) |
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73 |
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74 |
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75 top_graphs = list() |
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76 |
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77 def push_top_graph_stmt(str, loc, toks): |
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78 |
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79 attrs = {} |
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80 g = None |
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81 |
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82 for element in toks: |
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83 |
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84 if (isinstance(element, (ParseResults, tuple, list)) and |
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85 len(element) == 1 and |
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86 isinstance(element[0], str_type)): |
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87 |
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88 element = element[0] |
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89 |
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90 if element == 'strict': |
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91 attrs['strict'] = True |
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92 |
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93 elif element in ['graph', 'digraph']: |
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94 |
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95 attrs = {} |
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96 |
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97 g = pydot.Dot(graph_type=element, **attrs) |
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98 attrs['type'] = element |
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99 |
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100 top_graphs.append( g ) |
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101 |
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102 elif isinstance( element, str_type): |
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103 g.set_name( element ) |
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104 |
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105 elif isinstance(element, pydot.Subgraph): |
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106 |
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107 g.obj_dict['attributes'].update( element.obj_dict['attributes'] ) |
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108 g.obj_dict['edges'].update( element.obj_dict['edges'] ) |
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109 g.obj_dict['nodes'].update( element.obj_dict['nodes'] ) |
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110 g.obj_dict['subgraphs'].update( element.obj_dict['subgraphs'] ) |
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111 |
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112 g.set_parent_graph(g) |
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113 |
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114 elif isinstance(element, P_AttrList): |
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115 attrs.update(element.attrs) |
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116 |
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117 elif isinstance(element, (ParseResults, list)): |
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118 add_elements(g, element) |
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119 |
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120 else: |
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121 raise ValueError( |
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122 'Unknown element statement: {s}'.format(s=element)) |
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123 |
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124 |
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125 for g in top_graphs: |
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126 update_parent_graph_hierarchy(g) |
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127 |
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128 if len( top_graphs ) == 1: |
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129 return top_graphs[0] |
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130 |
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131 return top_graphs |
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132 |
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133 |
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134 def update_parent_graph_hierarchy(g, parent_graph=None, level=0): |
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135 |
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136 |
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137 if parent_graph is None: |
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138 parent_graph = g |
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139 |
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140 for key_name in ('edges',): |
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141 |
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142 if isinstance(g, pydot.frozendict): |
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143 item_dict = g |
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144 else: |
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145 item_dict = g.obj_dict |
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146 |
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147 if key_name not in item_dict: |
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148 continue |
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149 |
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150 for key, objs in item_dict[key_name].items(): |
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151 for obj in objs: |
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152 if ('parent_graph' in obj and |
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153 obj['parent_graph'].get_parent_graph()==g): |
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154 if obj['parent_graph'] is g: |
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155 pass |
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156 else: |
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157 obj['parent_graph'].set_parent_graph(parent_graph) |
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158 |
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159 if key_name == 'edges' and len(key) == 2: |
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160 for idx, vertex in enumerate( obj['points'] ): |
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161 if isinstance( vertex, |
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162 (pydot.Graph, |
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163 pydot.Subgraph, pydot.Cluster)): |
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164 vertex.set_parent_graph(parent_graph) |
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165 if isinstance( vertex, pydot.frozendict): |
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166 if vertex['parent_graph'] is g: |
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167 pass |
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168 else: |
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169 vertex['parent_graph'].set_parent_graph( |
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170 parent_graph) |
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171 |
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172 |
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173 |
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174 def add_defaults(element, defaults): |
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175 |
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176 d = element.__dict__ |
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177 for key, value in defaults.items(): |
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178 if not d.get(key): |
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179 d[key] = value |
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180 |
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181 |
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182 |
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183 def add_elements(g, toks, defaults_graph=None, |
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184 defaults_node=None, defaults_edge=None): |
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185 |
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186 if defaults_graph is None: |
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187 defaults_graph = {} |
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188 if defaults_node is None: |
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189 defaults_node = {} |
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190 if defaults_edge is None: |
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191 defaults_edge = {} |
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192 |
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193 for elm_idx, element in enumerate(toks): |
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194 |
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195 if isinstance(element, (pydot.Subgraph, pydot.Cluster)): |
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196 |
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197 add_defaults(element, defaults_graph) |
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198 g.add_subgraph(element) |
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199 |
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200 elif isinstance(element, pydot.Node): |
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201 |
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202 add_defaults(element, defaults_node) |
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203 g.add_node(element) |
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204 |
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205 elif isinstance(element, pydot.Edge): |
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206 |
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207 add_defaults(element, defaults_edge) |
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208 g.add_edge(element) |
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209 |
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210 elif isinstance(element, ParseResults): |
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211 |
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212 for e in element: |
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213 add_elements(g, [e], defaults_graph, |
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214 defaults_node, defaults_edge) |
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215 |
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216 elif isinstance(element, DefaultStatement): |
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217 |
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218 if element.default_type == 'graph': |
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219 |
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220 default_graph_attrs = pydot.Node('graph', **element.attrs) |
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221 g.add_node(default_graph_attrs) |
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222 |
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223 elif element.default_type == 'node': |
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224 |
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225 default_node_attrs = pydot.Node('node', **element.attrs) |
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226 g.add_node(default_node_attrs) |
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227 |
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228 elif element.default_type == 'edge': |
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229 |
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230 default_edge_attrs = pydot.Node('edge', **element.attrs) |
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231 g.add_node(default_edge_attrs) |
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232 defaults_edge.update(element.attrs) |
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233 |
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234 else: |
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235 raise ValueError( |
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236 'Unknown DefaultStatement: {s}'.format( |
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237 s=element.default_type)) |
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238 |
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239 elif isinstance(element, P_AttrList): |
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240 |
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241 g.obj_dict['attributes'].update(element.attrs) |
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242 |
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243 else: |
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244 raise ValueError( |
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245 'Unknown element statement: {s}'.format(s=element)) |
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246 |
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247 |
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248 def push_graph_stmt(str, loc, toks): |
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249 |
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250 g = pydot.Subgraph('') |
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251 add_elements(g, toks) |
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252 return g |
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253 |
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254 |
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255 def push_subgraph_stmt(str, loc, toks): |
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256 |
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257 g = pydot.Subgraph('') |
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258 for e in toks: |
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259 if len(e)==3: |
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260 e[2].set_name(e[1]) |
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261 if e[0] == 'subgraph': |
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262 e[2].obj_dict['show_keyword'] = True |
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263 return e[2] |
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264 else: |
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265 if e[0] == 'subgraph': |
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266 e[1].obj_dict['show_keyword'] = True |
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267 return e[1] |
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268 |
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269 return g |
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270 |
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271 |
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272 def push_default_stmt(str, loc, toks): |
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273 |
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274 # The pydot class instances should be marked as |
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275 # default statements to be inherited by actual |
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276 # graphs, nodes and edges. |
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277 # |
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278 default_type = toks[0][0] |
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279 if len(toks) > 1: |
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280 attrs = toks[1].attrs |
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281 else: |
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282 attrs = {} |
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283 |
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284 if default_type in ['graph', 'node', 'edge']: |
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285 return DefaultStatement(default_type, attrs) |
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286 else: |
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287 raise ValueError( |
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288 'Unknown default statement: {s}'.format(s=toks)) |
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289 |
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290 |
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291 def push_attr_list(str, loc, toks): |
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292 |
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293 p = P_AttrList(toks) |
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294 return p |
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295 |
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296 |
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297 def get_port(node): |
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298 |
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299 if len(node)>1: |
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300 if isinstance(node[1], ParseResults): |
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301 if len(node[1][0])==2: |
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302 if node[1][0][0]==':': |
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303 return node[1][0][1] |
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304 |
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305 return None |
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306 |
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307 |
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308 def do_node_ports(node): |
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309 |
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310 node_port = '' |
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311 if len(node) > 1: |
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312 node_port = ''.join( [str(a)+str(b) for a,b in node[1] ] ) |
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313 |
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314 return node_port |
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315 |
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316 |
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317 def push_edge_stmt(str, loc, toks): |
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318 |
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319 tok_attrs = [a for a in toks if isinstance(a, P_AttrList)] |
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320 attrs = {} |
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321 for a in tok_attrs: |
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322 attrs.update(a.attrs) |
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323 |
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324 e = [] |
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325 |
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326 if isinstance(toks[0][0], pydot.Graph): |
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327 |
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328 n_prev = pydot.frozendict(toks[0][0].obj_dict) |
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329 else: |
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330 n_prev = toks[0][0] + do_node_ports( toks[0] ) |
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331 |
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332 if isinstance(toks[2][0], ParseResults): |
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333 |
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334 n_next_list = [[n.get_name(),] for n in toks[2][0] ] |
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335 for n_next in [n for n in n_next_list]: |
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336 n_next_port = do_node_ports(n_next) |
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337 e.append(pydot.Edge(n_prev, n_next[0]+n_next_port, **attrs)) |
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338 |
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339 elif isinstance(toks[2][0], pydot.Graph): |
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340 |
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341 e.append(pydot.Edge(n_prev, |
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342 pydot.frozendict(toks[2][0].obj_dict), |
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343 **attrs)) |
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344 |
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345 elif isinstance(toks[2][0], pydot.Node): |
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346 |
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347 node = toks[2][0] |
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348 |
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349 if node.get_port() is not None: |
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350 name_port = node.get_name() + ":" + node.get_port() |
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351 else: |
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352 name_port = node.get_name() |
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353 |
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354 e.append(pydot.Edge(n_prev, name_port, **attrs)) |
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355 |
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356 # if the target of this edge is the name of a node |
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357 elif isinstance(toks[2][0], str_type): |
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358 |
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359 for n_next in [n for n in tuple(toks)[2::2]]: |
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360 |
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361 if (isinstance(n_next, P_AttrList) or |
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362 not isinstance(n_next[0], str_type)): |
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363 continue |
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364 |
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365 n_next_port = do_node_ports( n_next ) |
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366 e.append(pydot.Edge(n_prev, n_next[0]+n_next_port, **attrs)) |
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367 |
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368 n_prev = n_next[0]+n_next_port |
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369 else: |
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370 raise Exception( |
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371 'Edge target {r} with type {s} unsupported.'.format( |
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372 r=toks[2][0], s=type(toks[2][0]))) |
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373 |
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374 return e |
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375 |
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376 |
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377 |
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378 def push_node_stmt(s, loc, toks): |
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379 |
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380 if len(toks) == 2: |
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381 attrs = toks[1].attrs |
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382 else: |
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383 attrs = {} |
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384 |
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385 node_name = toks[0] |
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386 if isinstance(node_name, list) or isinstance(node_name, tuple): |
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387 if len(node_name)>0: |
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388 node_name = node_name[0] |
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389 |
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390 n = pydot.Node(str(node_name), **attrs) |
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391 return n |
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392 |
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393 |
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394 |
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395 |
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396 |
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397 |
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398 graphparser = None |
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399 |
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400 def graph_definition(): |
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401 |
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402 global graphparser |
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403 |
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404 if not graphparser: |
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405 |
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406 # punctuation |
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407 colon = Literal(":") |
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408 lbrace = Literal("{") |
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409 rbrace = Literal("}") |
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410 lbrack = Literal("[") |
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411 rbrack = Literal("]") |
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412 lparen = Literal("(") |
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413 rparen = Literal(")") |
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414 equals = Literal("=") |
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415 comma = Literal(",") |
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416 dot = Literal(".") |
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417 slash = Literal("/") |
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418 bslash = Literal("\\") |
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419 star = Literal("*") |
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420 semi = Literal(";") |
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421 at = Literal("@") |
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422 minus = Literal("-") |
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423 |
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424 # keywords |
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425 strict_ = CaselessLiteral("strict") |
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426 graph_ = CaselessLiteral("graph") |
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427 digraph_ = CaselessLiteral("digraph") |
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428 subgraph_ = CaselessLiteral("subgraph") |
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429 node_ = CaselessLiteral("node") |
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430 edge_ = CaselessLiteral("edge") |
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431 |
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432 |
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433 # token definitions |
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434 |
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435 identifier = Word(alphanums + "_." ).setName("identifier") |
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436 |
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437 double_quoted_string = QuotedString( |
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438 '"', multiline=True, unquoteResults=False, escChar='\\') # dblQuotedString |
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439 |
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440 noncomma = "".join([c for c in printables if c != ","]) |
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441 alphastring_ = OneOrMore(CharsNotIn(noncomma + ' ')) |
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442 |
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443 def parse_html(s, loc, toks): |
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444 return '<%s>' % ''.join(toks[0]) |
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445 |
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446 |
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447 opener = '<' |
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448 closer = '>' |
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449 html_text = nestedExpr( opener, closer, |
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450 ( CharsNotIn( opener + closer ) ) |
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451 ).setParseAction(parse_html).leaveWhitespace() |
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452 |
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453 ID = ( identifier | html_text | |
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454 double_quoted_string | #.setParseAction(strip_quotes) | |
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455 alphastring_ ).setName("ID") |
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456 |
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457 |
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458 float_number = Combine(Optional(minus) + |
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459 OneOrMore(Word(nums + "."))).setName("float_number") |
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460 |
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461 righthand_id = (float_number | ID ).setName("righthand_id") |
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462 |
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463 port_angle = (at + ID).setName("port_angle") |
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464 |
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465 port_location = (OneOrMore(Group(colon + ID)) | |
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466 Group(colon + lparen + |
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467 ID + comma + ID + rparen)).setName("port_location") |
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468 |
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469 port = (Group(port_location + Optional(port_angle)) | |
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470 Group(port_angle + Optional(port_location))).setName("port") |
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471 |
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472 node_id = (ID + Optional(port)) |
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473 a_list = OneOrMore(ID + Optional(equals + righthand_id) + |
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474 Optional(comma.suppress())).setName("a_list") |
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475 |
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476 attr_list = OneOrMore(lbrack.suppress() + Optional(a_list) + |
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477 rbrack.suppress()).setName("attr_list") |
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478 |
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479 attr_stmt = (Group(graph_ | node_ | edge_) + |
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480 attr_list).setName("attr_stmt") |
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481 |
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482 edgeop = (Literal("--") | Literal("->")).setName("edgeop") |
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483 |
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484 stmt_list = Forward() |
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485 graph_stmt = Group(lbrace.suppress() + Optional(stmt_list) + |
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486 rbrace.suppress() + |
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487 Optional(semi.suppress())).setName("graph_stmt") |
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488 |
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489 |
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490 edge_point = Forward() |
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491 |
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492 edgeRHS = OneOrMore(edgeop + edge_point) |
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493 edge_stmt = edge_point + edgeRHS + Optional(attr_list) |
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494 |
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495 subgraph = Group( |
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496 subgraph_ + Optional(ID) + graph_stmt).setName("subgraph") |
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497 |
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498 edge_point << Group( |
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499 subgraph | graph_stmt | node_id).setName('edge_point') |
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500 |
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501 node_stmt = ( |
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502 node_id + Optional(attr_list) + |
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503 Optional(semi.suppress())).setName("node_stmt") |
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504 |
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505 assignment = (ID + equals + righthand_id).setName("assignment") |
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506 stmt = (assignment | edge_stmt | attr_stmt | |
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507 subgraph | graph_stmt | node_stmt).setName("stmt") |
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508 stmt_list << OneOrMore(stmt + Optional(semi.suppress())) |
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509 |
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510 graphparser = OneOrMore( |
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511 (Optional(strict_) + Group((graph_ | digraph_)) + |
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512 Optional(ID) + graph_stmt).setResultsName("graph")) |
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513 |
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514 singleLineComment = Group( |
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515 "//" + restOfLine) | Group("#" + restOfLine) |
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516 |
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517 |
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518 # actions |
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519 |
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520 graphparser.ignore(singleLineComment) |
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521 graphparser.ignore(cStyleComment) |
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522 |
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523 assignment.setParseAction(push_attr_list) |
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524 a_list.setParseAction(push_attr_list) |
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525 edge_stmt.setParseAction(push_edge_stmt) |
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526 node_stmt.setParseAction(push_node_stmt) |
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527 attr_stmt.setParseAction(push_default_stmt) |
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528 |
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529 subgraph.setParseAction(push_subgraph_stmt) |
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530 graph_stmt.setParseAction(push_graph_stmt) |
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531 graphparser.setParseAction(push_top_graph_stmt) |
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532 |
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533 |
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534 return graphparser |
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535 |
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536 |
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537 def parse_dot_data(s): |
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538 """Parse DOT description in (unicode) string `s`. |
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539 |
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540 @return: Graphs that result from parsing. |
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541 @rtype: `list` of `pydot.Dot` |
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542 """ |
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543 global top_graphs |
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544 top_graphs = list() |
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545 try: |
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546 graphparser = graph_definition() |
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547 graphparser.parseWithTabs() |
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548 tokens = graphparser.parseString(s) |
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549 return list(tokens) |
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550 except ParseException as err: |
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551 print(err.line) |
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552 print(" " * (err.column - 1) + "^") |
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553 print(err) |
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554 return None |