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enumerateFunction is used to traverse the elements in the sequence and their subscripts. It is mostly used to get the count in the for loop. The enumerate parameter is a traversable variable, such as string , list, etc.
Generally, for a list or array when both index and elements need to be traversed , it will be written like this:
for i in range (0,len(list)): print i ,list[i]
But this method is a bit cumbersome. Using the built-in enumerrate function will be more direct and elegant. Let’s first look at the definition of enumerate. :
def enumerate(collection): 'Generates an indexed series: (0,coll[0]), (1,coll[1]) ...' i = 0 it = iter(collection) while 1: yield (i, it.next()) i += 1
enumerate will group the array or list into an index sequence. This makes it more convenient for us to obtain the index and index content as follows:
for index,text in enumerate(list): print index ,text
i = 0 seq = ['one', 'two', 'three'] for element in seq: print i, seq[i] i += 10 one1 two2 three
##Code example 2:
seq = ['one', 'two', 'three'] for i, element in enumerate(seq): print i, seq[i]
0 one
1 two
2 three
##Code example 3:
for i,j in enumerate('abc'): print i,j0 a1 b2 c
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