class_docstr: Create a graph from the execution flow of the ast
class_docstr_tok: ["Create","a","graph","from","the","execution","flow","of","the","ast"]
code: def visitAssign(self, node):
      nodes = self.visit(node.value)
  
      tsymbols = get_symbols(node, _ast.Store)
      re_defined = tsymbols.intersection(set(self.graph.nodes()))
      if re_defined:
          add_edges(self.graph, re_defined, re_defined)
  
      targets = set()
      for target in node.targets:
          targets.update(self.visit(target))
  
      add_edges(self.graph, targets, nodes)
  
      return targets | nodes
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from ...asttools import Visitor, visit_children
  import _ast
  from ...asttools.visitors.symbol_visitor import get_symbols
label_desc: Use image node_id 6 for calling the GraphGen obj's underlying member method code with example usage: obj.visitAssign(node) and returns: unknown