def foo(a, b, c=30):
    print 'foo'
    print 'a =', a
    print 'b =', b
    print 'c =', c
    print

def bar(b, a):
    print 'bar'
    print 'a =', a
    print 'b =', b
    print



## positional arguments
#foo(10, 20)
#bar(10, 20)

## keywords arguments
#foo(a=10, b=20)
#bar(a=10, b=20)




def complex(*args, **kwds):
    print 'There are', len(args), 'positional arguments'
    for arg in args:
        print arg
    print

    print 'Keywords arguments'
    for key in kwds:
        print key, '=', kwds[key]
    print


##complex(1, 2, 'foo', 'bar', a=10, b=20)
##complex(a=10, b=20)