有关json.loads()

我在获取网站JSON表格时用到json.loads()。因为网站数据页数较多，用到for循环。循环次数少，没有问题。循环次数一多，json.loads()就出错。不是网站数据问题，因为出错时已经循环的次数不固定。
出错信息：
Traceback (most recent call last):
File “/sy/python/获取股东表.py”, line 37, in
df=get_a_table(url)
File “/sy/python/获取股东表.py”, line 16, in get_a_table
jsonDatas = json.loads(datas)
File “/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/json/init.py”, line 357, in loads
return _default_decoder.decode(s)
File “/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/json/decoder.py”, line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File “/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/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)