Count indexes using for in Python

Question

I need to do in Python the same as   for  i   0  i  lt  5  i     cout  lt  lt  i      but I don t know how to use FOR in Python to get the index of the elements in a list

User · Answer

If you have some given list  and want to iterate over its items and indices  you can use enumerate     for index  item in enumerate my list       print index  item   If you only need the indices  you can use range     for i in range len my list        print i

User · Answer

In additon to other answers - very often  you do not have to iterate using the index but you can simply use a for-each expression   my list     a    b    c   for item in my list      print item

User · Answer

use enumerate    gt  gt  gt  l     a    b    c    d    gt  gt  gt  for index  val in enumerate l          print   d   s     index  val       0  a 1  b 2  c 3  d

User · Answer

If you have an existing list and you want to loop over it and keep track of the indices you can use the enumerate function  For example  l     apple    pear    banana   for i  fruit in enumerate l      print  index   i   is   fruit

User · Answer

This   for i in range 0 5     print i

User · Answer

Just use   for i in range 0  5       print i   to iterate through your data set and print each value   For large data sets  you want to use xrange  which has a very similar signature  but works more effectively for larger data sets  http   docs python org library functions html xrange

User · Answer

The most simple way I would be going for is   i   -1 for step in my list      i    1     print i    OR - WE CAN CHANGE THE ORDER OF EXECUTION - SEEMS MORE REASONABLE  i   0 for step in my list      print i   DO SOMETHING THEN INCREASE  i      i    1

[python] Count indexes using "for" in Python

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