# >>Traitement des tuyaux avec
class PIPE:
    def __init__(self, val):
        self.val = val

    def __rshift__(self, other):
        if callable(other.val):
            return PIPE(other.val(self.val))
        return other.val
        
    def __str__(self):
        return str(self.val)

result = PIPE([3,1,2]) >> PIPE(sorted)
print(result) # [1, 2, 3]

#Le lambda et la fonction peuvent être utilisés.
#imprimer aussi.
_ = PIPE([3,1,2]) \
    >> PIPE(sorted) \
    >> PIPE(reversed) \
    >> PIPE(lambda lst: [l+1 for l in lst]) \
    >> PIPE(list) \
    >> PIPE(print) # [4, 3, 2]

##Lorsque vous souhaitez utiliser le format avec print.
_ = PIPE({"K0":1, "K1":2}) \
    >> PIPE(lambda d: sum([v for k,v in d.items()])) \
    >> PIPE(lambda s: "sum is {}".format(s)) \
    >> PIPE(print) # sum is 3

_ = PIPE({"K0":1, "K1":2}) \
    >> PIPE(lambda d: {k:v+1 for k,v in d.items()}) \
    >> PIPE(lambda d: {k.replace("K", "KEY"): v for k,v in d.items()}) \
    >> PIPE(print) # {'KEY0': 2, 'KEY1': 3}

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