ERROR: the Exception:
Traceback (the most recent call last) :
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _internal, cli \ base_command py", line 153, in _main
Status=self. The run (options, args)
File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _internal \ commands, the py", line 455, in the run
Use_user_site=options. Use_user_site,
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _internal \ the req, set py", line 62, in install_given_reqs
* * kwargs
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _internal \ the req \ req_install py", line 861, in the install
Use_user_site=use_user_site, pycompile=pycompile,
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _internal \ the req \ req_install py", line 495, in move_wheel_files
Warn_script_location=warn_script_location,
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages \ PIP \ _internal \ wheel py", line 594, in move_wheel_files
Generated_console_scripts=maker. Make_multiple (scripts_to_generate)
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _vendor \ distlib \ scripts py", line 402, in make_multiple
Filenames. The extend (self. Make (specification, options))
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages \ PIP \ _internal \ wheel py", line 330, in the make
Return super (PipScriptMaker, self.) make (specification, options)
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _vendor \ distlib \ scripts py", line 391, in the make
Self. _make_script (entry, filenames, options=options)
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _vendor \ distlib \ scripts py", line 295, in _make_script
Self. _write_script (scriptnames shebang, script, filenames, ext)
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _vendor \ distlib \ scripts py", line 231, in _write_script
The launcher=self. _get_launcher (' t ')
The File "C: \ Users \ 12159 \ AppData \ \ Roaming \ Python Python37 \ site - packages, PIP, _vendor \ distlib \ scripts py", line 370, in _get_launcher
Result=finder (distlib_package). Find (name) bytes
AttributeError: 'NoneType' object has no attribute 'bytes'
WARNING: You are using PIP version 19.3.1; Clear that version 20.1.1 is available.
You should consider upgrading via the 'python - m PIP install, upgrade PIP' command.