[Tutor] Output of list

Martin Walsh mwalsh at groktech.org
Sun Dec 23 02:25:54 CET 2007

Ricardo Aráoz wrote:
> Emil wrote:
>> hey
>> I want to be capable of converting a string into a list where all the items, in  the list, have a fixed length not equal to 1 e.g i have k = 'abcdefgh' and I want the fixed length for all the the items to be 2 then the list would look like ['ab', 'cd', 'ef, 'gh']. How do i do this?
> Also : [''.join(i) for i in zip(k[::2], k[1::2])]

Cool use of 'zip' and extended slicing!

Just thought I would add that 'zip' truncates after the shortest
sequence, which would cause data loss for strings of odd length -- of
course, the OP may not consider this a problem.

In [1]: k = 'abcdefghi' # <- note the 'i'

In [2]: len(k)
Out[2]: 9

In [3]: [''.join(i) for i in zip(k[::2], k[1::2])]
Out[3]: ['ab', 'cd', 'ef', 'gh'] # <- 'i' is gone


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