# ran on `python -m morss`

import os
import sys

from . import wsgi
from . import cli

from .morss import MorssException

import wsgiref.simple_server
import wsgiref.handlers


PORT = int(os.getenv('PORT', 8080))


def isInt(string):
    try:
        int(string)
        return True

    except ValueError:
        return False


def main():
    if 'REQUEST_URI' in os.environ:
        # mod_cgi (w/o file handler)

        app = wsgi.cgi_app
        app = wsgi.cgi_dispatcher(app)
        app = wsgi.cgi_error_handler(app)
        app = wsgi.cgi_encode(app)

        wsgiref.handlers.CGIHandler().run(app)

    elif len(sys.argv) <= 1:
        # start internal (basic) http server (w/ file handler)

        app = wsgi.cgi_app
        app = wsgi.cgi_file_handler(app)
        app = wsgi.cgi_dispatcher(app)
        app = wsgi.cgi_error_handler(app)
        app = wsgi.cgi_encode(app)

        print('Serving http://localhost:%s/' % port)
        httpd = wsgiref.simple_server.make_server('', PORT, app)
        httpd.serve_forever()

    else:
        # as a CLI app
        try:
            cli.cli_app()

        except (KeyboardInterrupt, SystemExit):
            raise

        except Exception as e:
            print('ERROR: %s' % e.message)

if __name__ == '__main__':
    main()

# ran on `python -m morss`

import os
import sys

from . import wsgi
from . import cli

from .morss import MorssException

import wsgiref.simple_server
import wsgiref.handlers


PORT = int(os.getenv('PORT', 8080))


def main():
    if 'REQUEST_URI' in os.environ:
        # mod_cgi (w/o file handler)

        app = wsgi.cgi_app
        app = wsgi.cgi_dispatcher(app)
        app = wsgi.cgi_error_handler(app)
        app = wsgi.cgi_encode(app)

        wsgiref.handlers.CGIHandler().run(app)

    elif len(sys.argv) <= 1:
        # start internal (basic) http server (w/ file handler)

        app = wsgi.cgi_app
        app = wsgi.cgi_file_handler(app)
        app = wsgi.cgi_dispatcher(app)
        app = wsgi.cgi_error_handler(app)
        app = wsgi.cgi_encode(app)

        print('Serving http://localhost:%s/' % port)
        httpd = wsgiref.simple_server.make_server('', PORT, app)
        httpd.serve_forever()

    else:
        # as a CLI app
        try:
            cli.cli_app()

        except (KeyboardInterrupt, SystemExit):
            raise

        except Exception as e:
            print('ERROR: %s' % e.message)

if __name__ == '__main__':
    main()

Remove now-unused isInt code