First example, Python (keeping a similar API):

    list_student_ids = get(STUDENTS.keys) # [0]

second example, Python:

    @delete
    @path(r'{uid: [0-9]+}')
    def delete_student(uid):
        if STUDENTS.pop(uid, None): # [0]
            return True
        raise WebApplicationException(Response.Status.NOT_FOUND)

the last line generally wouldn't be this complex, in Flask you'd just call `flask.abort(404)` (which can be used inline with an `or`, as with waffle_ss's ruby example, but that's not usual/good Python style), in Django it'd be `raise Http404()`.

Although in Django you'd really use the `get_object_or_404` shortcut for ORM objects:

    def delete_student(uid):
        get_object_or_404(StudentModel, pk=uid).delete()
        return True

And you wouldn't bother with the return since a 200 result would mean the deletion was correctly executed.

[0] Used Python's MutableMapping API here, it works slightly differently than Java's equivalent Map interface: `.keys()` returns a sequence of the mapping's keys and `.pop()` asks for a default value to return in case nothing was found there, otherwise it raises `KeyError` if the key was not found)