combinations.py

from my_print import mprint

def combinations(secuence):
    return [(i, j) for i in secuence for j in secuence if i != j]


# Same as:
def combinations_2(secuence):
    result = []
    for i in secuence:
        mprint('i in 1st loop: {i}')
        for j in secuence:
            mprint('\tj in 2nd loop: {j}')
        #if i != j:     # not needed -_-
        result.append((i,j))
    mprint('Result:\n{result}')
    return result

if __name__ == '__main__':
    def test():
        sec = 'abcd123'
        mprint('sec: {sec}')
        print 'Combinations version 1:\n{0}'.format(combinations(sec))
        print 'Combinations version 2:'
        combinations_2(sec)

    test()