异常信息
python3.9.15 调用 pandas 遇到错误提示：
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Traceback (most recent call last):
File "export.py", line 40, in <module>
from models.common import Conv
File "/workspace/yolov5-v6/models/common.py", line 13, in <module>
import pandas as pd
File "/usr/local/lib/python3.6/site-packages/pandas/__init__.py", line 52, in <module>
from pandas.core.api import (
File "/usr/local/lib/python3.6/site-packages/pandas/core/api.py", line 29, in <module>
from pandas.core.groupby import Grouper, NamedAgg
File "/usr/local/lib/python3.6/site-packages/pandas/core/groupby/__init__.py", line 1, in <module>
from pandas.core.groupby.generic import DataFrameGroupBy, NamedAgg, SeriesGroupBy
File "/usr/local/lib/python3.6/site-packages/pandas/core/groupby/generic.py", line 57, in <module>
from pandas.core.aggregation import (
File "/usr/local/lib/python3.6/site-packages/pandas/core/aggregation.py", line 27, in <module>
from pandas.core.series import FrameOrSeriesUnion, Series
File "/usr/local/lib/python3.6/site-packages/pandas/core/series.py", line 68, in <module>
from pandas.core import algorithms, base, generic, nanops, ops
File "/usr/local/lib/python3.6/site-packages/pandas/core/generic.py", line 102, in <module>
from pandas.io.formats import format as fmt
File "/usr/local/lib/python3.6/site-packages/pandas/io/formats/format.py", line 71, in <module>
from pandas.io.common import stringify_path
File "/usr/local/lib/python3.6/site-packages/pandas/io/common.py", line 3, in <module>
import bz2
File "/usr/local/lib/python3.6/bz2.py", line 23, in <module>
from _bz2 import BZ2Compressor, BZ2Decompressor
ModuleNotFoundError: No module named '_bz2'
这是因为从终端安装 python3 版本时，最新版本的 python3.9+ 缺少这个文件。需要手动添加。
异常解决
1、在终端执行以下命令
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$ sudo apt-get install libbz2-dev
2、然后进入 Python3 的安装目录，重新编译 Python3
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$ cd Python-3.9.15
$ sudo ./configure --enable-optimozations
$ sudo make -j8
$ sudo make install
3、验证方法就是进入 python3 环境，看是否能导入 bz2 模块
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$ python3
>>> import bz2
相关链接：
Ubuntu下Python3解决modulenotfounderror: no module named ‘_bz2’
