def _invert(h):
        "Cheap function to invert a hash."
        i = {}
        for k,v in h.items():
            i[v] = k
        return i
def _invert(h):
        "Cheap function to invert a hash."
        i = {}
        for k,v in h.items():
            i[v] = k
        return i
def _invert ( h ) : i = { } for k , v in h . items ( ) : i [ v ] = k return i
Cheap function to invert a hash.
Cheap function to invert a hash .