Differentiate between MSYS2 & Powershell/Command Prompt

Question

I'm writing a python project which is not going to work on PowerShell or Command Prompt, but it does work on MSYS2.

Is there any way to differentiate between MSYS2 and PowerShell/Command Prompt?

I tried os.name and sys.version, but both return same result between these 3.

Answer 1

Combining Abner Ham's answer with shellingham module:

import shellingham

def provide_default():
    if 'MSYSTEM' in os.environ:
        return 'bash'
    elif 'PSModulePath' in os.environ:
        return 'powershell'
    elif 'SHELL' in os.environ:
        return 'bash'
    else:
        return 'cmd'

try:
    shell = shellingham.detect_shell()
except shellingham.ShellDetectionFailure:
    shell = provide_default()
if shell != 'bash':
    print(f"Shell detected: {shell}")
    print("Please use bash shell (Linux, MacOS, WSL, MSYS2, etc.) to run this script.")
    return