py2.cmd

@echo off & python -x %~f0 %* & goto :EOF

import os.path
import sys
import subprocess

PATH_PREFIXES = [r'C:\Python27', r'C:\Python27\Scripts',
                 r'C:\Python27\Library\bin', '']
EXTENSIONS = ['.exe', '.cmd', '.bat']


def get_path(path):
    for path_prefix in PATH_PREFIXES:
        for extension in EXTENSIONS:
            runnable = os.path.join(path_prefix, path) + extension
            if os.path.exists(runnable):
                return runnable
    return path


args = sys.argv[1:]
args[0] = get_path(sys.argv[1])
subprocess.run(args)