kumar s wrote:
> Dear group,
>
> unfortunately my previous post got tagged as
> 'homework' mail and got no responses.
>
> In short, I have a dictionary structure as depicted
> below.
>
> I want to go over every key and print the key,value
> pairs in a more sensible way.
>
> I have written a small piece of code. May I request
> tutors to go through it and comment if it is correct
> or prone to bugs.
>
> Thank you.
> kum
>
>>>> md = {(21597133, 21597325): [['NM_032457']],
> (21399193, 21399334): [['NM_032456'], ['NM_002589']],
> (21397395, 21399192): [['NM_032457'], ['NM_032456'],
> ['NM_002589']],
> (21407733, 21408196): [['NM_002589']],
> (21401577, 21402315): [['NM_032456']],
> (21819453, 21820111): [['NM_032457']],
> (21399335, 21401576): [['NM_032457'], ['NM_032456'],
> ['NM_002589']]}
>
>>>> for item in md.keys():
> mlst = []
> for frnd in md[item]:
> for srnd in frnd:
> mlst.append(srnd)
> mystr = ','.join(mlst)
> print(('%d\t%d\t%s')%(item[0],item[1],mystr))
This is OK but it could be shorter. I usually use dict.items() when I
need both the keys and values of a dictionary. The nested lists seem to
always have one item in them so maybe you could pull that out directly
instead of with a for loop. Then a list comprehension would make the
code more concise. So I would write this more this way:
for key, value in md.items():
mlst = [ frnd[0] for frnd in value ]
mystr = ','.join(mlst)
print(('%d\t%d\t%s')%(key[0],key[1],mystr))
This is not more correct, just more concise.
Also if you care about the order of the output you could easily sort it
using
for key, value in sorted(md.items()):
Kent
>
>
> 21597133 21597325 NM_032457
> 21399193 21399334 NM_032456,NM_002589
> 21397395 21399192 NM_032457,NM_032456,NM_002589
> 21407733 21408196 NM_002589
> 21401577 21402315 NM_032456
> 21819453 21820111 NM_032457
> 21399335 21401576 NM_032457,NM_032456,NM_002589
>
>
>
> ____________________________________________________________________________________Fussy?
> Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and
> lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
>
> _______________________________________________
> Tutor maillist - [email protected]
> http://mail.python.org/mailman/listinfo/tutor
>
_______________________________________________
Tutor maillist - [email protected]
http://mail.python.org/mailman/listinfo/tutor
