Can’t pip install prettytable

Traceback (most recent call last):
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/subprocess.py", line 73, in
import msvcrt
ModuleNotFoundError: No module named 'msvcrt'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/bin/pip", line 5, in
from pip._internal.cli.main import main
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/site-packages/pip/_internal/cli/main.py", line 10, in
from pip._internal.cli.autocompletion import autocomplete
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/site-packages/pip/_internal/cli/autocompletion.py", line 9, in
from pip._internal.cli.main_parser import create_main_parser
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/site-packages/pip/_internal/cli/main_parser.py", line 7, in
from pip._internal.cli import cmdoptions
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/site-packages/pip/_internal/cli/cmdoptions.py", line 18, in
from distutils.util import strtobool
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/distutils/util.py", line 14, in
from distutils.spawn import spawn
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/distutils/spawn.py", line 11, in
import subprocess
File "/private/var/containers/Bundle/Application/AFB2E12F-462D-46EF-A988-B81BAE71430D/Carnets.app/Library/lib/python3.9/subprocess.py", line 78, in
import _posixsubprocess
ModuleNotFoundError: No module named '_posixsubprocess'

Reproduce `pip install prettytable` in the Carnets iOS environment and begin with the `subprocess.py`, `distutils/spawn.py`, and pip import paths shown in the traceback. Done means pip can install prettytable without the missing `msvcrt` or `_posixsubprocess` errors.

Written by the indexing model from the issue text.