配环境时那些奇怪的报错

2021-05-31

字数统计: 380字 | 阅读时长: 2分

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记录一下。

1. ImportError: cannot import name ‘NoReturn’

python3.6下使用pip时报错：

Traceback (most recent call last):
  File "/home/wangyatian/miniconda3/envs/DSFD_env/bin/pip", line 6, in <module>
    from pip._internal.cli.main import main
  File "/home/wangyatian/miniconda3/envs/DSFD_env/lib/python3.6/site-packages/pip/_internal/cli/main.py", line 9, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/home/wangyatian/miniconda3/envs/DSFD_env/lib/python3.6/site-packages/pip/_internal/cli/autocompletion.py", line 10, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/home/wangyatian/miniconda3/envs/DSFD_env/lib/python3.6/site-packages/pip/_internal/cli/main_parser.py", line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "/home/wangyatian/miniconda3/envs/DSFD_env/lib/python3.6/site-packages/pip/_internal/cli/cmdoptions.py", line 30, in <module>
    from pip._internal.utils.hashes import STRONG_HASHES
  File "/home/wangyatian/miniconda3/envs/DSFD_env/lib/python3.6/site-packages/pip/_internal/utils/hashes.py", line 2, in <module>
    from typing import TYPE_CHECKING, BinaryIO, Dict, Iterator, List, NoReturn
ImportError: cannot import name 'NoReturn'

解决方法：重装python版本，从3.6.0更换为3.6.5（没有试过3.6的其他版本）

1	conda install python==3.6.5

再次使用pip时会有以下警告，但是好歹能用了。

WARNING: Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /home/wangyatian/miniconda3/envs/DSFD_env/include/python3.6m/UNKNOWN
sysconfig: /home/wangyatian/miniconda3/envs/DSFD_env/include/python3.6m
WARNING: Additional context:
user = False
home = None
root = None
prefix = None

2. import torch报错

python==3.6.0

pytorch==1.8.0

import torch报错

1
2
3

 File "/home/wangyatian/miniconda3/envs/python36/lib/python3.6/site-packages/torch/init.py", line 196, in <module>
    from torch._C import *
ImportError: /home/wangyatian/miniconda3/envs/python36/lib/python3.6/site-packages/torch/lib/libtorch_python.so: undefined symbol: PySlice_Unpack

将python版本改为3.6.3即可