TypeError:类型别名不能与isinstance()一起使用 [英] TypeError: Type aliases cannot be used with isinstance()
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问题描述
自从我将pandas升级到0.23.0以来,我在运行删除空白df.any_column = df.any_column.str.replace(' ','')
Ever since I upgraded pandas to 0.23.0, I'm getting this error for running a line to remove whitespace df.any_column = df.any_column.str.replace(' ','')
我收到的错误消息如下:
The error message that I'm getting is below:
/usr/local/lib/python3.5/dist-packages/pandas/core/strings.py in replace(self, pat, repl, n, case, flags, regex)
2427 def replace(self, pat, repl, n=-1, case=None, flags=0, regex=True):
2428 result = str_replace(self._data, pat, repl, n=n, case=case,
-> 2429 flags=flags, regex=regex)
2430 return self._wrap_result(result)
2431
/usr/local/lib/python3.5/dist-packages/pandas/core/strings.py in str_replace(arr, pat, repl, n, case, flags, regex)
637 raise TypeError("repl must be a string or callable")
638
--> 639 is_compiled_re = is_re(pat)
640 if regex:
641 if is_compiled_re:
/usr/local/lib/python3.5/dist-packages/pandas/core/dtypes/inference.py in is_re(obj)
217 """
218
--> 219 return isinstance(obj, re_type)
220
221
/usr/lib/python3.5/typing.py in __instancecheck__(self, obj)
258
259 def __instancecheck__(self, obj):
--> 260 raise TypeError("Type aliases cannot be used with isinstance().")
261
262 def __subclasscheck__(self, cls):
TypeError: Type aliases cannot be used with isinstance().
我该如何解决?
推荐答案
这是Python 3.5.2及更低版本的错误.升级您的python(类似于3.5.4或更高版本),或者等到下一个pandas版本发布,其中包括以下修复程序:
That's a bug in Python 3.5.2 and lower. Either upgrade your python (something like 3.5.4 or newer should work), or wait till the next pandas release, which includes the fix: https://github.com/pandas-dev/pandas/pull/21098
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