python-疑难杂症-python3支持bz2（Ubuntu+python3+pyenv+bz2）

背景

疑难杂症系列，专门解决工程中遇到的疑难杂症。

出现的问题

>>> import pandas
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/__init__.py", line 55, in <module>
    from pandas.core.api import (
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/core/api.py", line 24, in <module>
    from pandas.core.groupby import Grouper, NamedAgg
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/core/groupby/__init__.py", line 1, in <module>
    from pandas.core.groupby.generic import (  # noqa: F401
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/core/groupby/generic.py", line 44, in <module>
    from pandas.core.frame import DataFrame
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/core/frame.py", line 88, in <module>
    from pandas.core.generic import NDFrame, _shared_docs
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/core/generic.py", line 70, in <module>
    from pandas.io.formats.format import DataFrameFormatter, format_percentiles
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/io/formats/format.py", line 48, in <module>
    from pandas.io.common import _expand_user, _stringify_path
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/site-packages/pandas/io/common.py", line 3, in <module>
    import bz2
  File "/home/wang/.pyenv/versions/3.6.8/lib/python3.6/bz2.py", line 23, in <module>
    from _bz2 import BZ2Compressor, BZ2Decompressor
ModuleNotFoundError: No module named '_bz2'

解决思路

• Ubuntu安装bz2，sudo apt install libbz2-dev
• 重新安装pyenv的python，pyenv uninstall 3.6.8， pyenv install 3.6.8

不过之前安装的包就都没了。。。

评价

重新安装python的方法在pyenv上比较容易实现，但是系统的python就算了，很多应用都会对其进行依赖，导致出现各种问题。