BUG: Getting import error on master "Cannot import IS64"

[phofl]

I might be doing something wrong here, but when executing

import pandas as pd

I get an import error after pulling f40e58c. The commit before is fine. Can someone reproduce?

Traceback (most recent call last):
  File "/home/developer/.config/JetBrains/PyCharm2021.1/scratches/scratch_4.py", line 566, in <module>
    import pandas as pd
  File "/home/developer/PycharmProjects/pandas/pandas/__init__.py", line 22, in <module>
    from pandas.compat import (
  File "/home/developer/PycharmProjects/pandas/pandas/compat/__init__.py", line 15, in <module>
    from pandas.compat.numpy import (
  File "/home/developer/PycharmProjects/pandas/pandas/compat/numpy/__init__.py", line 7, in <module>
    from pandas.util.version import Version
  File "/home/developer/PycharmProjects/pandas/pandas/util/__init__.py", line 1, in <module>
    from pandas.util._decorators import (  # noqa
  File "/home/developer/PycharmProjects/pandas/pandas/util/_decorators.py", line 14, in <module>
    from pandas._libs.properties import cache_readonly  # noqa
  File "/home/developer/PycharmProjects/pandas/pandas/_libs/__init__.py", line 13, in <module>
    from pandas._libs.interval import Interval
  File "pandas/_libs/interval.pyx", line 1, in init pandas._libs.interval
  File "pandas/_libs/hashtable.pyx", line 1, in init pandas._libs.hashtable
  File "pandas/_libs/missing.pyx", line 30, in init pandas._libs.missing
ImportError: cannot import name IS64

Process finished with exit code 1

The show versions is from the last working commit

cc @fangchenli

Output of pd.show_versions()

INSTALLED VERSIONS

commit : a43c42c
python : 3.8.6.final.0
python-bits : 64
OS : Linux
OS-release : 5.8.0-50-generic
Version : #56~20.04.1-Ubuntu SMP Mon Apr 12 21:46:35 UTC 2021
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 1.3.0.dev0+1544.ga43c42c32d
numpy : 1.20.0
pytz : 2020.5
dateutil : 2.8.1
pip : 20.3.3
setuptools : 49.6.0.post20210108
Cython : 0.29.21
pytest : 6.2.1
hypothesis : 6.0.2
sphinx : 3.4.3
blosc : None
feather : None
xlsxwriter : 1.3.7
lxml.etree : 4.6.2
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 2.11.2
IPython : 7.19.0
pandas_datareader: None
bs4 : 4.9.3
bottleneck : 1.3.2
fsspec : 0.8.5
fastparquet : 0.5.0
gcsfs : 0.7.1
matplotlib : 3.3.3
numexpr : 2.7.2
odfpy : None
openpyxl : 3.0.6
pandas_gbq : None
pyarrow : 1.0.0
pyxlsb : None
s3fs : 0.4.2
scipy : 1.6.0
sqlalchemy : 1.3.22
tables : 3.6.1
tabulate : 0.8.7
xarray : 0.16.2
xlrd : 2.0.1
xlwt : 1.3.0
numba : 0.52.0
None

[jbrockmendel]

have you rebuilt recently?

[phofl]

Yes, did not fix it.

But just setup my complete conda env from scratch , this fixed the error

[abmyii]

For me the solution (after ensuring my environment was setup correctly) was to run:

make clean   # May be optional
make build