python - import pandas 出现“无法导入名称'doc'”的错误？

Question

导入熊猫时出现以下错误。如何解决？

>>> import pandas as pd
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/anaconda3/lib/python3.6/site-packages/pandas/__init__.py", line 42, in <module>
    from pandas.core.api import *
  File "/anaconda3/lib/python3.6/site-packages/pandas/core/api.py", line 10, in <module>
    from pandas.core.groupby import Grouper
  File "/anaconda3/lib/python3.6/site-packages/pandas/core/groupby/__init__.py", line 1, in <module>
    from pandas.core.groupby.generic import DataFrameGroupBy, NamedAgg, SeriesGroupBy
  File "/anaconda3/lib/python3.6/site-packages/pandas/core/groupby/generic.py", line 35, in <module>
    from pandas.util._decorators import Appender, Substitution, doc
ImportError: cannot import name 'doc'

命令conda list pandas显示

/anaconda3/bin/conda list pandas
# packages in environment at /anaconda3:
#
# Name                    Version                   Build  Channel
geopandas                 0.9.0                     <pip>
pandas                    1.1.5                     <pip>
pandas                    0.22.0           py36hf484d3e_0