centOS7 使用安装python 后使用pips指令报错ModuleNotFoundError: No module named '

Looking in indexes: http://mirrors.aliyun.com/pypi/simple/
 Collecting virtualenv
 Downloading http://mirrors.aliyun.com/pypi/packages/84/3a/9d656ec2535fa5f6680d55ef93a05f890bd1b2ad6f2bf97b34a679abf365/virtualenv-20.0.13-py2.py3-none-any.whl (4.6 MB)
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 Collecting distlib<1,>=0.3.0
 Downloading http://mirrors.aliyun.com/pypi/packages/7d/29/694a3a4d7c0e1aef76092e9167fbe372e0f7da055f5dcf4e1313ec21d96a/distlib-0.3.0.zip (571 kB)
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 Collecting six<2,>=1.9.0
 Downloading http://mirrors.aliyun.com/pypi/packages/65/eb/1f97cb97bfc2390a276969c6fae16075da282f5058082d4cb10c6c5c1dba/six-1.14.0-py2.py3-none-any.whl (10 kB)
 Collecting filelock<4,>=3.0.0
 Downloading http://mirrors.aliyun.com/pypi/packages/93/83/71a2ee6158bb9f39a90c0dea1637f81d5eef866e188e1971a1b1ab01a35a/filelock-3.0.12-py3-none-any.whl (7.6 kB)
 Collecting appdirs<2,>=1.4.3
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 Collecting importlib-metadata<2,>=0.12; python_version < “3.8”
 Downloading http://mirrors.aliyun.com/pypi/packages/8b/03/a00d504808808912751e64ccf414be53c29cad620e3de2421135fcae3025/importlib_metadata-1.5.0-py2.py3-none-any.whl (30 kB)
 Collecting zipp>=0.5
 Downloading http://mirrors.aliyun.com/pypi/packages/b2/34/bfcb43cc0ba81f527bc4f40ef41ba2ff4080e047acb0586b56b3d017ace4/zipp-3.1.0-py3-none-any.whl (4.9 kB)
 Installing collected packages: distlib, six, filelock, appdirs, zipp, importlib-metadata, virtualenv
 Running setup.py install for distlib … done
 Successfully installed appdirs-1.4.3 distlib-0.3.0 filelock-3.0.12 importlib-metadata-1.5.0 six-1.14.0 virtualenv-20.0.13 zipp-3.1.0