ImportError: No module named PySimpleGUI

Question

I am attempting to use PySimpleGUI to create a very simple GUI, but when I run the command "python hello_world.py" I get the error:

File "hello_world.py", line 3, in <module>
    import PySimpleGUI as sg
ImportError: No module named PySimpleGUI

I've run the command "pip install PySimpleGUI" and it says "Successfully installed PySimpleGUI-4.55.1." I'm not sure what I'm missing here.

Code snippet here:

# hello_world.py

import PySimpleGUI as sg

sg.Window(title="Hello World", layout=[[]], margins=(100,50)).read()

Answer 1

check where python is installed

import os
import sys
print(os.path.dirname(sys.executable))

>>C:\Program Files\Python310 #here 310 is python version your may be differrent

if this outputs inside C:\Program Files\Python310

check for C:\Program Files\Python310\Lib\site-packages\PySimpleGUI

if its not there then Run CMD as admin and try python -m pip install PySimpleGUI

Answer 2

Update pip to the current version via "python -m pip install --update pip".

It's strange, but my PySimpleGUI module became visible after I updated the pip from version 21.2.3 to version 22.0.4 via "python-m pip install --update pip".

Before the pip version update, the contents of my local environment looked like this:

(env) D:\work\PycharmProjects\demo>pip list  
Package     Version
----------- -------
flake8      4.0.1
mccabe      0.6.1
pip         21.2.3
pycodestyle 2.8.0
pyflakes    2.4.0
setuptools  57.4.0
WARNING: You are using pip version 21.2.3; however, version 22.0.4 is available.
You should consider upgrading via the 'D:\work\PycharmProjects\demo\env\Scripts\python.exe -m pip install --upgrade pip' command.

After the update:

(env) D:\work\PycharmProjects\demo>pip list
Package     Version
----------- -------
flake8      4.0.1
mccabe      0.6.1
pip         22.0.4
pycodestyle 2.8.0
pyflakes    2.4.0
PySimpleGUI 4.57.0
setuptools  57.4.0

And the program hello_world.py it began to run successfully.

Answer 3

EDIT Dec2021:

This seems to me like an bug with pip rather than PySimpleGUI. Try this https://pip.pypa.io/en/stable/installation/ reinstall pip in the python interpreter using this.

Original Answer:

You can check all the installed packages with

python3 -m pip list

And see if you find PySimpleGUI in it. If yes then python3 hello_world.py should work if not (i suspect latter) run

python3 -m pip install PySimpleGUI