Python错误json.decoder.JSONDecodeError：期望值：行1列1（字符0）

Question

嗨，伙计们，我有一段代码可以获取表中的行数，然后请求它们，但是我得到

json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Answer 1

似乎您正在尝试解析空字符串（或从空文件中读取）。最小的有效JSON字符串必须仍然具有顶级数组或字典，即[]或{}是最小的有效JSON字符串。在

import json
json.loads("")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)