Is it possible to make python throw errors if the type of the argument passed to the annotated function doesn't match the one specified?

Question

One of the new features in python3.5 is type hinting. For example the code below is valid now:

def greeting(name: str) -> str:
    return \'Hello \' + nam         


        

Answer 1

I think the simplest way is to check the type:

def greeting(name):
    if not isintstance(name, str):
        raise TypeError('Expected str; got %s' % type(name).__name__)
    return 'Hello ' + name