Add a --python option

src/pip/_internal/cli/cmdoptions.py

@@ -189,6 +189,13 @@ class PipOption(Option):
  ),
 )
 
+python: Callable[..., Option] = partial(
+ Option,
+ "--python",
+ dest="python",
+ help="Run pip with the specified Python interpreter.",
+)
+
 verbose: Callable[..., Option] = partial(
  Option,
  "-v",
@@ -1029,6 +1036,7 @@ def check_list_path_option(options: Values) -> None:
  debug_mode,
  isolated_mode,
  require_virtualenv,
+ python,
  verbose,
  version,
  quiet,

src/pip/_internal/cli/main_parser.py

@@ -2,9 +2,11 @@
 """
 
 import os
+import subprocess
 import sys
 from typing import List, Tuple
 
+from pip._internal.build_env import _get_runnable_pip
 from pip._internal.cli import cmdoptions
 from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
 from pip._internal.commands import commands_dict, get_similar_commands
@@ -57,6 +59,19 @@ def parse_command(args: List[str]) -> Tuple[str, List[str]]:
  # args_else: ['install', '--user', 'INITools']
  general_options, args_else = parser.parse_args(args)
 
+ # --python
+ if general_options.python:
+ if "_PIP_RUNNING_IN_SUBPROCESS" not in os.environ:
+ pip_cmd = [
+ general_options.python,
+ _get_runnable_pip(),
+ ]
+ pip_cmd.extend(args)
+ # Block recursing indefinitely
+ os.environ["_PIP_RUNNING_IN_SUBPROCESS"] = "1"
+ proc = subprocess.run(pip_cmd)
+ sys.exit(proc.returncode)
+
  # --version
  if general_options.version:
  sys.stdout.write(parser.version)