print('In example module')
print(f'  globals: {sorted(globals().keys())}')
print(f'   locals: {sorted(locals().keys())}')


def foo(n):
    def bar(m):
        print('In bar function')
        print(f'  globals: {sorted(globals().keys())}')
        print(f'   locals: {sorted(locals().keys())}')
        return n + m

    print('In foo function')
    print(f'  globals: {sorted(globals().keys())}')
    print(f'   locals: {sorted(locals().keys())}')
    return bar(4)


print('Preparing to call foo function')
print(f'  globals: {sorted(globals().keys())}')
print(f'   locals: {sorted(locals().keys())}')
print('Calling foo function')
print(f'foo function returned {foo(2)}')