Running Python file by double-click

right click on the file->open with->choose default program->more options->select python.exe file and click on.

Right click the file, select open with. If you want to simply run the script, find python.exe and select it. If you want to debug with IDLE, find that executable and select it.

When I had both Py2 and Py3, and then removed the former, my script wouldn't run by double-clicking it either (but fine from console.) I realized my __pycache__ folder (same directory as the script) was the issue. Problem solved when deleted.

You can also start a Django app this way. Once the Django server starts it enters a "wait" kind of mode so a batch file only requires two lines:

ECHO ON
python manage.py runserver

Manage.py can be in any directory, just keep the full folder path in the command within the batch file:

ECHO ON
python C:\temp\manage.py runserver

Solution for Ubuntu users. Right-click on the file, then select open with, then choose your python version, it shode be in
/bin folder, usually it's /bin/python3.exe

In Windows 10, using regedit:

• Under HKEY_CLASSES_ROOT, create key: .py
• Edit Default string value to be py_auto_file (or any other name you want to call it)
• Under HKCR, create another key: py_auto_file (or any matching name that you have just picked)
• Under this key, create nested sub-keys: shell --> open --> command.
• Edit Default string value to "C:\path\to\your\python.exe" "%1"

Step 1: Create the Python Script (myscript.py) Open a text editor and write the Python script as follows:

import os
import random
import pandas as pd 

# Create the directory if it does not exist
if not os.path.exists(f'C:\\Users\\%USERNAME%\\Desktop'):
    os.makedirs(f'C:\\Users\\%USERNAME%\\Desktop')

# Generate new random data
names = ["John", "Jane", "Michael", "Emma", "William"]
ages = [random.randint(20, 50) for _ in range(len(names))]
states = [random.choice(["CA", "NY", "TX"]) for _ in range(len(names))]
salaries = [random.randint(25000, 80000) for _ in range(len(names))]

# Create the new Emp dictionary with random data
Emp = {"Name": names, "Age": ages, "State": states, "Salary": salaries}

DF = pd.DataFrame(Emp, index=[f"E{i}" for i in range(1, len(names)+1)])

# Save the data to a CSV file
DF.to_csv(f'C:\\Users\\%USERNAME%\\Desktop\\file.csv', index=False)
Save this Python script as myscript.py.

Step 2: Create the Batch File (myscript.bat) Open a text editor and write the following lines:

@cd %DIR%

@python.exe myscript.py %* 

@pause

Save this text as myscript.bat in the same folder where you have the Python script (myscript.py).

Now, double click the bat file, it should work.

If you encounter issues running the Python script from the batch file, you may need to add the Python executable path to the "system's" PATH variable. Follow these steps to do so:

Step 3: Add Python to the PATH variable

Locate the path to your Python installation by using following code:

import sys
print(sys.exec_prefix)

For example, if you are using an Anaconda environment and your environment name is "myenv_name," the path could be something like C:\Users\%USERNAME%\miniconda3\envs\myenv_name.

Open the Start menu, type "Environment Variables," and click on "Edit the system environment variables."

In the "System Properties" window, click on the "Environment Variables" button.

Under the "System variables" section, find the "Path" variable, and click on "Edit."

In the "Edit environment variable" window, click on "New" and add the path to your Python executable (e.g., C:\Users\%USERNAME%\miniconda3\envs\myenv_name).

Click "OK" to close all the windows.

Step 4: Run the Batch File Navigate to the folder where you have created both files (myscript.py and myscript.bat). 
Double-click on the myscript.bat file to execute your Python script.

The myscript.py will generate new random data for the "Name", "Age", "State", and "Salary" fields each time you run the script. The new data will then be saved to the CSV file at C:\\Users\\%USERNAME%\\Desktop\\file.csv.

By following these steps and adding Python to the PATH variable, you should be able to run your Python script successfully on Windows 11 using the batch file and generate different random data each time you execute the script.

The simple solution for non-Windows environments is to create a .desktop file for your script.

[Desktop Entry]
Name=My script
Version=1.0
Exec=python3 /usr/local/share/myscript/myscript.py
Icon=/usr/local/share/myscript.png
Comment=Run my fabulous script, imagine annoji here
Type=Application
Terminal=false
StartupNotify=false
Categories=Video;GTK;GNOME

If the script requires a virtual environment to be activated etc, you can do that in a one-liner (basically, run /path/to/your/venv/bin/python /path/to/your/script.py); for anything more complex, probably create a simple script which does all the necessary set-up, then run that from the Exec= line.

See also https://specifications.freedesktop.org/desktop-entry-spec/latest/ and/or e.g. https://askubuntu.com/questions/342950/how-do-i-create-a-desktop-entry-to-launch-a-python-script