def foo(default="bacon"):
    print("You like",default,"right?")
    def test():
        print("hello")
    return test

print('<function foo.<locals>.test' in str(foo()))
foo("sports")

def fillValues(a=1,b=2,c="c",d=None,e=2.71828):
    print(a,b,c,d,e)

fillValues(b=True)
fillValues(c="test",a="one",e=object)

# Not like in Python! This is absolutely an anti-feature in Python.
def alwaysAFreshList(l=[]):
    print("l=",l)
    l.append(1)
    print("l*=",l)

alwaysAFreshList()
alwaysAFreshList()
alwaysAFreshList([1,2,3])
alwaysAFreshList([1,2,3])
alwaysAFreshList()