gclient.py 文件源码

def ast2str(node, indent=0):
  """Return a pretty-printed rendition of an ast.Node."""
  t = type(node)
  if t is ast.Module:
    return '\n'.join([ast2str(x, indent) for x in node.body])
  elif t is ast.Assign:
    return (('  ' * indent) +
            ' = '.join([ast2str(x) for x in node.targets] +
                       [ast2str(node.value, indent)]) + '\n')
  elif t is ast.Name:
    return node.id
  elif t is ast.List:
    if not node.elts:
      return '[]'
    elif len(node.elts) == 1:
      return '[' + ast2str(node.elts[0], indent) + ']'
    return ('[\n' + ('  ' * (indent + 1)) +
            (',\n' + ('  ' * (indent + 1))).join(
                [ast2str(x, indent + 1) for x in node.elts]) +
            '\n' + ('  ' * indent) + ']')
  elif t is ast.Dict:
    if not node.keys:
      return '{}'
    elif len(node.keys) == 1:
      return '{%s: %s}' % (ast2str(node.keys[0]),
                           ast2str(node.values[0], indent + 1))
    return ('{\n' + ('  ' * (indent + 1)) +
            (',\n' + ('  ' * (indent + 1))).join(
                ['%s: %s' % (ast2str(node.keys[i]),
                             ast2str(node.values[i], indent + 1))
                 for i in range(len(node.keys))]) +
            '\n' + ('  ' * indent) + '}')
  elif t is ast.Str:
    return "'%s'" % node.s
  else:
    raise gclient_utils.Error("Unexpected AST node at line %d, column %d: %s"
                              % (node.lineno, node.col_offset, t))