python iterate a specific range in a list

Question

Lets say I have a list  listOfStuff    a b    c d    e f    f g    What I want to do is to iterate through the middle 2 components in a way similar to the following code  for item in listOfStuff range 2 3      print item  The end result should be as below   c d   e f   This code currently does not work  but I hope you can understand what I am trying to do

User · Answer

By using iter builtin   l    1  2  3    i is the first item  i   iter l  next i  for d in i      print d

User · Answer

A more memory efficient way to iterate over a slice of a list would be to use islice   from the itertools module   from itertools import islice  listOfStuff      a   b      c   d      e   f      g   h     for item in islice listOfStuff  1  3       print item      c    d       e    f     However  this can be relatively inefficient in terms of performance if the start value of the range is a large value sinceislicewould have to iterate over the first start value-1 items before returning items

User · Answer

listOfStuff    a b    c d    e f    f g    for item in listOfStuff 1 3       print item   You have to iterate over a slice of your tuple  The 1 is the first element you need and 3  actually 2 1  is the first element you don t need   Elements in a list are numerated from 0   listOfStuff    a b    c d    e f    f g                  0      1      2      3    1 3  takes elements 1 and 2

User · Answer

You want to use slicing   for item in listOfStuff 1 3       print item

[python] python: iterate a specific range in a list

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