Is there a shorter/better way to validate request params?
Yes. The args attribute of a Flask/Werkzeug Request object is an ImmutableMultiDict, which is a subclass of MultiDict. The MultiDict.get() method accepts a type argument which does exactly what you want:
count = request.args.get('count', DEFAULT_COUNT, type=int)Here's the relevant section of the docs:
get(key, default=None, type=None)Return the default value if the requested data doesn’t exist. If
typeis provided and is a callable it should convert the value, return it or raise aValueErrorif that is not possible. In this case the function will return the default as if the value was not found:>>> d = TypeConversionDict(foo='42', bar='blub')>>> d.get('foo', type=int)42>>> d.get('bar', -1, type=int)-1