python (3.11.7)
       1  import os
       2  import sys
       3  
       4  # Remove '' and current working directory from the first entry
       5  # of sys.path, if present to avoid using current directory
       6  # in pip commands check, freeze, install, list and show,
       7  # when invoked as python -m pip <command>
       8  if sys.path[0] in ("", os.getcwd()):
       9      sys.path.pop(0)
      10  
      11  # If we are running from a wheel, add the wheel to sys.path
      12  # This allows the usage python pip-*.whl/pip install pip-*.whl
      13  if __package__ == "":
      14      # __file__ is pip-*.whl/pip/__main__.py
      15      # first dirname call strips of '/__main__.py', second strips off '/pip'
      16      # Resulting path is the name of the wheel itself
      17      # Add that to sys.path so we can import pip
      18      path = os.path.dirname(os.path.dirname(__file__))
      19      sys.path.insert(0, path)
      20  
      21  if __name__ == "__main__":
      22      from pip._internal.cli.main import main as _main
      23  
      24      sys.exit(_main())