version.py

import sys, os
from pprint import pformat

def application(environ, start_response):
    """
    Simple WSGI application for python version info.

    Note that the Python Flask library framework is built ontop of the WSGI
    using the Werkzeug library to fit the WSGI specification.

    Thus, this module's application is a simpler backend check.
    """
    status = '200 OK'

    output = "Python version = {}\n".format(sys.version)
    output += "PATH = {}\n".format(os.environ.get('PATH', 'N/A'))
    output += "Python executable = {}\n".format(sys.executable)
    output += "Python PREFIX = {}\n".format(sys.prefix)
    output += "Python PATH = {}\n".format(sys.path[:5])
    output += "ENV = {}\n".format(pformat(dict(os.environ)))
    output += "environ = {}\n".format(pformat(environ))

    output = output.encode()

    response_headers = [
        ('Content-type', 'text/plain'),
        ('Content-Length', str(len(output)))
    ]

    start_response(status, response_headers)
    return [output]