Concatenating two range function results

Question

Does range function allows concatenation ? Like i want to make a range(30) & concatenate it with range(2000, 5002). So my concatenated range w

Answer 1

You can use itertools.chain for this:

from itertools import chain
concatenated = chain(range(30), range(2000, 5002))
for i in concatenated:
     ...

It works for arbitrary iterables. Note that there's a difference in behavior of range() between Python 2 and 3 that you should know about: in Python 2 range returns a list, and in Python3 an iterator, which is memory-efficient, but not always desirable.

Lists can be concatenated with +, iterators cannot.

Answer 2

With the help of the extend method, we can concatenate two lists.

>>> a = list(range(1,10))
>>> a.extend(range(100,105))
>>> a  
[1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 101, 102, 103, 104]