Why can't call the installed Pillow module in virtual environment directory?

Question

Create an ai virtual environment:

pyton3.11 -m  venv ai

Install module in virtual environment:

cd  ai
python3.11 -m pip install Pillow
python3.11
Python 3.11.0rc2 (main, Jul 21 2023, 09:39:42) [GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
import Pillow
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'Pillow'

The Pillow was installed in /home/debian/.local/lib/python3.11/site-packages,why python3.11 -m pip install Pillow can't install the module Pillow inside ai/lib/python3.11/site-packages?

Answer 1

The import name for Pillow is PIL. Instead of import Pillow, use:

import PIL

Answer 2

It seems that before pip install, you should activate venv ai. You just only create venv ai, but it is not activated.

source ai/bin/activate

It will be needed before pip install.

Answer 3

Enable the virtual environment and import PIL:

debian@debian:~/ai$ source  bin/activate
(ai) debian@debian:~/ai$ python3.11 -m pip install Pillow
Collecting Pillow
  Using cached Pillow-10.0.0-cp311-cp311-manylinux_2_28_x86_64.whl (3.4 MB)
Installing collected packages: Pillow
Successfully installed Pillow-10.0.0

[notice] A new release of pip available: 22.2.2 -> 23.2.1
[notice] To update, run: pip install --upgrade pip
(ai) debian@debian:~/ai$ python3.11
Python 3.11.0rc2 (main, Jul 21 2023, 09:39:42) [GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import  Pillow
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'Pillow'
>>> import  PIL
>>>