Re: [Tutor] Output of list
Dear Emil,
> 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?
>
> - Emil
It is nice place to use a generator:
def pairs(sliceit):
streamlist = list(sliceit)
streamlist.reverse()
while streamlist:
pair = streamlist.pop()
try:pair += streamlist.pop()
except: pass
yield pair
## Probably it is easier to understand
def pairs2(sliceit):
try:
while sliceit:
yield sliceit[:2]
sliceit = sliceit[2:]
except: # oops, it was odd length
yield sliceit
print '_'.join(e for e in pairs('abcd'))
print '_'.join(e for e in pairs('abcde'))
print '_'.join(e for e in pairs2('abcd'))
print '_'.join(e for e in pairs2('abcde'))
Best Regards,
Janos
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Re: [Tutor] Output of list
János Juhász wrote: > It is nice place to use a generator: > > def pairs(sliceit): > streamlist = list(sliceit) > streamlist.reverse() > while streamlist: > pair = streamlist.pop() > try:pair += streamlist.pop() > except: pass > yield pair > > ## Probably it is easier to understand > def pairs2(sliceit): > try: > while sliceit: > yield sliceit[:2] > sliceit = sliceit[2:] > except: # oops, it was odd length > yield sliceit > ... Or, by extending Alan's solution ... def splitStringByN(s, n): for m in range(0, len(s), n): yield s[m:m+n] k = 'abcdefghi' list(splitStringByN(k, 2)) As it turns out, this is similar to an ASPN Cookbook recipe contributed by Dmitry Vasiliev: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/302069 HTH, Marty ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Output of list
Dear Marty, >... Or, by extending Alan's solution ... > >def splitStringByN(s, n): >for m in range(0, len(s), n): >yield s[m:m+n] > >k = 'abcdefghi' >list(splitStringByN(k, 2)) It seems to be the most readable solution for me. >As it turns out, this is similar to an ASPN Cookbook recipe contributed >by Dmitry Vasiliev: >http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/302069 > >HTH, >Marty Thanks for the link. Best regards, Janos ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Output of list
János Juhász wrote: > Dear Marty, Hi Janos, >> ... Or, by extending Alan's solution ... >> >> def splitStringByN(s, n): >>for m in range(0, len(s), n): >>yield s[m:m+n] >> >> k = 'abcdefghi' >> list(splitStringByN(k, 2)) > > It seems to be the most readable solution for me. For completeness, one could also pull it out of the function def and use a generator expression directly. If I'm not mistaken, this would be more or less equivalent: k = 'abcdefghi' list((k[m:m+2] for m in range(0, len(k), 2))) > > >> As it turns out, this is similar to an ASPN Cookbook recipe contributed >> by Dmitry Vasiliev: >> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/302069 >> >> HTH, >> Marty > > Thanks for the link. No problem. Happy Holidays! Marty ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Py2Exe Tutorial
I am wondering if there is a good tutorial on Py2Exe and its functions? I have not been able to find one. I have samples but that is not good enough. It would be nice to have something explain all the functions for including directories, modules and all that stuff when making an executable. Bruce ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
