[Tutor] New to programming question (Ben M.) (Joseph Q.)

[joe_schmoe]

Joseph Quigley wrote:
>  >>>>if letter == 'O':
>  >    print letter + 'u' + suffix
>  >elif 'Q':
>  >    print letter + 'u' + suffic
>  >else:
>  >    print letter + suffix
>  >
>  >Do you see?  The == "binds more tightly" than the or.  And, in python, 
> 'Q' is
>  >considered True for the purposes of tests.
>  >
>  >So this is what happens:
>  >
>  >>>> prefixes = 'JKLMNOPQ'
>  >>>> suffix = 'ack'
>  >>>>
>  >>>> for letter in prefixes:
>  >
>  >...   if letter == ('O') or ('Q'):
>  >...     print letter + 'u' + suffix
>  >...   else:
>  >...     print letter + suffix
>  >...
>  >Juack
>  >Kuack
>  >Luack
>  >Muack
>  >Nuack
>  >Ouack
>  >Puack
>  >Quack
>  >
>  >>>>
>  >
>  >What you can do instead is this:
>  >
>  >for letter in prefixes:
>  >    if letter in ['O', 'Q']:
>  >        print letter + 'u' + suffix
>  >    else:
>  >        print letter + suffix
> 
> Oh, ok. Sorry, my bad :)
> So there is a special use for ==. I must look into this.
> Thanks,
>     Joe
> 


"=" is for assignment of a value to a variable, as in a = 33
"==" is equivalent to, as in 2 * 2 == 4

I've been caught out on more than a few occasions on this distinction!! :)

HtH

/j