Count indexes using "for" in Python

Question

I need to do in Python the same as:

for (i = 0; i < 5; i++) {cout << i;}  

but I don't know how to use FOR in Python to get the index of the elements in a list.

Answer 1

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 

Answer 2

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