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| (venv) C:\Users\zxw\PycharmProjects\test>python -m pip install --upgrade pip
Collecting pip
Using cached https://files.pythonhosted.org/packages/0f/74/ecd13431bcc456ed390b44c8a6e917c1820365cbebcb6a8974d1cd045ab4/pip-10.0.1-py2.py3-none-any.whl
Installing collected packages: pip
Found existing installation: pip 9.0.3
Uninstalling pip-9.0.3:
Successfully uninstalled pip-9.0.3
Rolling back uninstall of pip
Exception:
Traceback (most recent call last):
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\commands\install.py", line 342, in run
prefix=options.prefix_path,
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\req\req_set.py", line 784, in install
**kwargs
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\req\req_install.py", line 851, in install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\req\req_install.py", line 1064, in move_wheel_files
isolated=self.isolated,
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\wheel.py", line 462, in move_wheel_files
generated.extend(maker.make(spec))
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\_vendor\distlib\scripts.py", line 372, in make
self._make_script(entry, filenames, options=options)
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\_vendor\distlib\scripts.py", line 276, in _make_script
self._write_script(scriptnames, shebang, script, filenames, ext)
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\_vendor\distlib\scripts.py", line 212, in _write_script
launcher = self._get_launcher('t')
File "C:\Users\zxw\PycharmProjects\test\venv\lib\site-packages\pip-9.0.3-py3.6.egg\pip\_vendor\distlib\scripts.py", line 351, in _get_launcher
result = finder(distlib_package).find(name).bytes
AttributeError: 'NoneType' object has no attribute 'bytes'
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