[BangPypers] A doubt in list comprehension

srid sridhar.ratna at gmail.com
Sat Sep 12 04:18:49 CEST 2009

On Fri, Sep 11, 2009 at 4:57 PM, Shashwat Anand
<anand.shashwat at gmail.com> wrote:
> However what if I want an if-else loop in nested for loop.

Are you referring to this:

   ['EVEN' if x%2==0 else 'ODD' for x in range(10)]

> for i in range(10):
>     for j in range(10):
>         for k in range(10):
>             if i == j and j == k:
>                 print "All equal"
>             elif (i == j and j != k) or (i == k and j != k):
>                 print "2 equal"
>             else:
>                 print "None equal"

If you are asking how to achieve the above code using list
comprehensions, then try

    return ["All equal" if i==j and j==k else (
		    "2 equal" if (i==j and j!=k) or (i==k and j!=k) \
			    else "None equal")
	    for i in range(10)
	    for j in range(10)
	    for k in range(10)]

For convenience, I pasted the code here: http://gist.github.com/185695

Speaking personally, your original code is just fine - it is simpler
than the list comprehension version above.


More information about the BangPypers mailing list