Joining pairs of elements of a list

Question

I know that a list can be joined to make one long string as in:

x = [\'a\', \'b\', \'c\', \'d\']
print \'\'.join(x)

Obviously this would ou

Answer 1

Without building temporary lists:

>>> import itertools
>>> s = 'abcdefgh'
>>> si = iter(s)
>>> [''.join(each) for each in itertools.izip(si, si)]
['ab', 'cd', 'ef', 'gh']

or:

>>> import itertools
>>> s = 'abcdefgh'
>>> si = iter(s)
>>> map(''.join, itertools.izip(si, si))
['ab', 'cd', 'ef', 'gh']