pip upgrade error

pip version을 업그레이드 시키려고 pip install --upgrade pip를 했는데, 아래 에러가 났다.

FileNotFoundError: [Errno 2] No such file or directory: '/usr/bin/pip3.8'
Call stack:
  File "/usr/local/bin/pip3", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/cli/main.py", line 70, in main
    return command.main(cmd_args)
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/cli/base_command.py", line 101, in main
    return self._main(args)
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/cli/base_command.py", line 223, in _main
    self.handle_pip_version_check(options)
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/cli/req_command.py", line 190, in handle_pip_version_check
    pip_self_version_check(session, options)
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/self_outdated_check.py", line 236, in pip_self_version_check
    logger.warning("[present-rich] %s", upgrade_prompt)
  File "/usr/lib/python3.8/logging/__init__.py", line 1458, in warning
    self._log(WARNING, msg, args, **kwargs)
  File "/usr/lib/python3.8/logging/__init__.py", line 1589, in _log
    self.handle(record)
  File "/usr/lib/python3.8/logging/__init__.py", line 1599, in handle
    self.callHandlers(record)
  File "/usr/lib/python3.8/logging/__init__.py", line 1661, in callHandlers
    hdlr.handle(record)
  File "/usr/lib/python3.8/logging/__init__.py", line 954, in handle
    self.emit(record)
  File "/usr/local/lib/python3.8/dist-packages/pip/_internal/utils/logging.py", line 179, in emit
    self.handleError(record)
Message: '[present-rich] %s'
Arguments: (UpgradePrompt(old='22.2.2', new='22.3'),)

해결방법은 간단했다.

python version이 여러개라서 그런것이다.
내가 pip은 3.6 pip3은 3.8 python version으로 세팅을 했었나 그랬다.

그래서 pip pip3를 명확히 입력하라는 에러였다.

---

pip install --upgrade pip 으로 업그레이드 시키고

패키지를 다운받을 때는 pip3 install -r new-package.txt , pip3 list처럼 pip을 명확히 사용하면 된다.