def putChild(path, child):
        """
        Put a child IResource implementor at the given path.

        @param path: A single path component, to be interpreted relative to the
            path this resource is found at, at which to put the given child.
            For example, if resource A can be found at I{http://example.com/foo}
            then a call like C{A.putChild(b"bar", B)} will make resource B
            available at I{http://example.com/foo/bar}.
        @type path: C{bytes}
        """

        Put a child IResource implementor at the given path.

        @param path: A single path component, to be interpreted relative to the
            path this resource is found at, at which to put the given child.
            For example, if resource A can be found at I{http://example.com/foo}
            then a call like C{A.putChild(b"bar", B)} will make resource B
            available at I{http://example.com/foo/bar}.
        @type path: C{bytes}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/resource.py