报错信息

  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python /home/john/.local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py get_requires_for_build_wheel /tmp/tmp5B9JuH
       cwd: /tmp/pip-install-2R0BLk/opencv-python
  Complete output (22 lines):
  Traceback (most recent call last):
    File "/home/john/.local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 280, in <module>
      main()
    File "/home/john/.local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 263, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/john/.local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 114, in get_requires_for_build_wheel
      return hook(config_settings)
    File "/usr/local/lib/python2.7/dist-packages/setuptools/build_meta.py", line 146, in get_requires_for_build_wheel
      return self._get_build_requires(config_settings, requirements=['wheel'])
    File "/usr/local/lib/python2.7/dist-packages/setuptools/build_meta.py", line 127, in _get_build_requires
      self.run_setup()
    File "/usr/local/lib/python2.7/dist-packages/setuptools/build_meta.py", line 243, in run_setup
      self).run_setup(setup_script=setup_script)
    File "/usr/local/lib/python2.7/dist-packages/setuptools/build_meta.py", line 142, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 448, in <module>
      main()
    File "setup.py", line 99, in main
      % {"ext": re.escape(sysconfig.get_config_var("EXT_SUFFIX"))}
    File "/usr/lib/python2.7/re.py", line 210, in escape
      s = list(pattern)
  TypeError: 'NoneType' object is not iterable

解决方案

版本太高或个边版本问题

pip install opencv-python==4.1.1.26