[Tutor] How can I replicate a list in a for loop

Alan Gauld alan.gauld at btinternet.com
Wed Feb 4 13:38:18 CET 2015


On 04/02/15 09:46, Suresh Kumar wrote:

>>>> print var
> ['a', 'b', 'c', 'd', 'e']

> the user gave two so code should be like this
>>>> for i in itertools.product(var,var):
>             print i[0]+i[1]

> output of code should be like this
> aa
> ab
...
> ee

> based on the user given input of length i need to add var in for loop
> if 3 given
>>>> for i in itertools.product(var,var,var):
>             print i[0]+i[1]+i[2]

OK, So the question is how to pass n copies of var to product()?

You could do it by enclosing var in an outer list or tuple, then 
unpacking the result in the call to product():

Untested...

for i in itertools.product(*((var,) * n)):
         print ''.join(i)

Does that work?


-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos




More information about the Tutor mailing list