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Date: Sun, 31 Aug 2014 22:53:01 +0100
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Subject: Re: This could be an interesting error
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Xref: csiph.com comp.lang.python:77362

On 2014-08-31 22:02, Seymore4Head wrote:
> import math
> import random
> import sys
>
> ex='Hey buddy get away from the car'
> newex = ex.split()
> sentence=""
>
> print (newex)
> wait = input ("          Wait")
>
> def pigword(test):
>      for x in range(len(test)):
>          if test[x] in "AEIOUaeiou":
>              stem = test [x:]
>              prefix = test [:x]
>              pigword = stem + prefix + "ay"
>              print ("Stem ",stem)
>              print ("Prefix",prefix)
>              print (pigword)
>              break
>      return (pigword)
>
> for x in range(len(newex)):
>      sentence = sentence + pigword(newex[x])+ " "
>      print (sentence)
>      wait = input ("          Wait")
>
> The program seems to work and it does work with everything I have
> tried so far.  The one exception is if you change "the" to "my" (in
> the first line) the program crashes.
>
>
> Traceback (most recent call last):
>    File "C:\Documents and
> Settings\Administrator\Desktop\Functions\test.py", line 25, in
> <module>
>      sentence = sentence + pigword(newex[x])+ " "
>    File "C:\Documents and
> Settings\Administrator\Desktop\Functions\test.py", line 22, in pigword
>      return (pigword)
> UnboundLocalError: local variable 'pigword' referenced before
> assignment
>>>>
>
'my' doesn't contain a vowel, therefore the condition of the 'if'
statement in 'pigword' is never true, therefore it never binds to the
name 'pigword'.

BTW, you have a function called 'pigword' that has a local name also
called 'pigword'. Try not to do that, because you could easily confuse
yourself.