You are using pip version 10.0.1, however version 20.2.2 is available.

在pycharm中出现如下错误

[root@Huawei ~/python]# pip3 install subprocess
Looking in indexes: http://mirrors.cloud.aliyuncs.com/pypi/simple/
Collecting subprocess
  Could not find a version that satisfies the requirement subprocess (from versions: )
No matching distribution found for subprocess
You are using pip version 10.0.1, however version 20.2.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

可见错误的大致意思为pip版本过低，建议升级新版本

有建议执行的语句，但是未能成功解决

最终解决方法如下

[root@Huawei ~/python]# python3 -m pip install -U pip
Looking in indexes: http://mirrors.cloud.aliyuncs.com/pypi/simple/
Collecting pip
  Downloading http://mirrors.cloud.aliyuncs.com/pypi/packages/5a/4a/39400ff9b36e719bdf8f31c99fe1fa7842a42fa77432e584f707a5080063/pip-20.2.2-py2.py3-none-any.whl (1.5MB)
    100% |████████████████████████████████| 1.5MB 91.0MB/s 
Installing collected packages: pip
  Found existing installation: pip 10.0.1
    Uninstalling pip-10.0.1:
      Successfully uninstalled pip-10.0.1
Successfully installed pip-20.2.2

pip3升级完成

[root@Huawei ~/python]# pip3 -V
pip 20.2.2 from /usr/local/lib/python3.7/site-packages/pip (python 3.7)

下载模块畅通无阻 amazing~~~