roll_dep_svn.py 文件源码

def find_dict_index(dict_node, key):
  """Given a key, find the index of the corresponding dict entry."""
  assert dict_node.__class__ is ast.Dict, ast_err_msg(dict_node)
  indices = [i for i, n in enumerate(dict_node.keys) if
             n.__class__ is ast.Str and n.s == key]
  assert len(indices) < 2, (
      'Found redundant dict entries for key "%s"' % key)
  return indices[0] if indices else None