bug

  File "<string>", line 110, in wrapper
File "<string>", line 105, in wrapper
File "<string>", line 216, in input
File "<string>", line 834, in _element
File "<string>", line 513, in find
File "<string>", line 440, in find_all
File "<string>", line 730, in _invoke
File "<string>", line 112, in execute
File "<string>", line 81, in execute
File "<string>", line 39, in execute
File "<string>", line 19, in write
File "C:\Program Files (x86)\ShadowBot\shadowbot-4.9.14\python\lib\json\__init__.py", line 231, in dumps
return _default_encoder.encode(obj)
File "C:\Program Files (x86)\ShadowBot\shadowbot-4.9.14\python\lib\json\encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "C:\Program Files (x86)\ShadowBot\shadowbot-4.9.14\python\lib\json\encoder.py", line 257, in iterencode
return _iterencode(o, 0)
RecursionError: maximum recursion depth exceeded while encoding a JSON object

有无限循环的应用，跑到一定的时候会出现这个错误。