Description
Code Sample, a copy-pastable example if possible
pd.Series(['a', 'b', 'c']).replace('a', 'x')Problem description
This raises the following error:
TypeError: Type aliases cannot be used with isinstance().
This behavior is exclusive to the new version 0.23. Previous versions work as expected.
Full traceback
---------------------------------------------------------------------------
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().
Expected Output
0 x
1 b
2 c
dtype: object
Output of pd.show_versions()
INSTALLED VERSIONS
commit: None
python: 3.5.1.final.0
python-bits: 64
OS: Linux
OS-release: 4.13.13-5-pve
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: en_US.UTF-8
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8
pandas: 0.23.0
pytest: None
pip: 8.1.1
setuptools: 20.7.0
Cython: None
numpy: 1.14.3
scipy: 1.1.0
pyarrow: None
xarray: None
IPython: 6.4.0
sphinx: None
patsy: None
dateutil: 2.6.1
pytz: 2018.4
blosc: None
bottleneck: None
tables: None
numexpr: None
feather: None
matplotlib: 2.2.2
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: 0.999
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None