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	zip
	
		a = [1,2,3,4,5]b = ['a','b','c','d','e']
for x,y in zip (a,b):print x,y
>>> A=[[1,2],['a','b']]>>> for b in zip(*A) : print(b)   #zip(*A) = zip([1,2],['a','b'])
 (1, 'a')
 (2, 'b')
 >>> for x,y in zip(*A) : print(x,y)
 1 a
 2 b
 >>> for b in zip(A) : print(b)
 ([1, 2],)
 (['a', 'b'],)
 >>> for b in A : print(b)
 [1, 2]
 ['a', 'b']
 
 
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