Lexical scope problem

ex.py

functions = []

for val in ['foo', 'bar', 'baz']:
    def f():
        return val
    functions.append(f)

for func in functions:
    print func()

ex_js.py

functions = []

for val in ['foo', 'bar', 'baz']:
    def g(val):
        def f():
            return val
        return f
    functions.append(g(val))

for func in functions:
    print func()