--------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-75-761515b509b4> in <module>() ----> 1 pd.Series(['a','b','c']).replace('a', 'x') ~/.virtualenvs/new/lib/python3.5/site-packages/pandas/core/series.py in replace(self, to_replace, value, inplace, limit, regex, method) 3427 return super(Series, self).replace(to_replace=to_replace, value=value, 3428 inplace=inplace, limit=limit, -> 3429 regex=regex, method=method) 3430 3431 @Appender(generic._shared_docs['shift'] % _shared_doc_kwargs) ~/.virtualenvs/new/lib/python3.5/site-packages/pandas/core/generic.py in replace(self, to_replace, value, inplace, limit, regex, method) 5877 new_data = self._data.replace(to_replace=to_replace, 5878 value=value, inplace=inplace, -> 5879 regex=regex) 5880 else: 5881 msg = ('Invalid "to_replace" type: ' ~/.virtualenvs/new/lib/python3.5/site-packages/pandas/core/internals.py in replace(self, **kwargs) 3718 3719 def replace(self, **kwargs): -> 3720 return self.apply('replace', **kwargs) 3721 3722 def replace_list(self, src_list, dest_list, inplace=False, regex=False, ~/.virtualenvs/new/lib/python3.5/site-packages/pandas/core/internals.py in apply(self, f, axes, filter, do_integrity_check, consolidate, **kwargs) 3579 3580 kwargs['mgr'] = self -> 3581 applied = getattr(b, f)(**kwargs) 3582 result_blocks = _extend_blocks(applied, result_blocks) 3583 ~/.virtualenvs/new/lib/python3.5/site-packages/pandas/core/internals.py in replace(self, to_replace, value, inplace, filter, regex, convert, mgr) 2430 blocks = [self] 2431 -> 2432 if not either_list and is_re(to_replace): 2433 return self._replace_single(to_replace, value, inplace=inplace, 2434 filter=filter, regex=True, ~/.virtualenvs/new/lib/python3.5/site-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) 256 257 def __instancecheck__(self, obj): --> 258 raise TypeError("Type aliases cannot be used with isinstance().") 259 260 def __subclasscheck__(self, cls): TypeError: Type aliases cannot be used with isinstance(). 

0 x 1 b 2 c dtype: object