Simple question from Python newb... What am I doing wrong? For x, y, z in aTuple:

[Mike C. Fletcher]

Amy G wrote:

>I have a whole bunch of tuples that look something like this,
>  
>
...

>for x, y, z in aTuple:
>    do something with x
>    do something with y
>    do something with z
>
>But I am getting the error that there are too many values to unpack.
>  
>
You have one of two problems, most likely:

    * if you really are doing for x,y,z in aTuple (not a list of
      aTuples), you're trying to unpack *each* item in aTuple (where
      each such item is a string, all of which happen to be much longer
      than three items) into three items.  Python right complains that
      the strings aren't all three characters long.
    * if you really are doing for x,y,z in aTupleList (a list of
      aTuples), you've got one non-standard tuple in the list, and can
      find it pretty easily by doing [ x for x in aTupleList if len(x)
      != 3 ] and then figure out how it got there.

My non-existent money is on the first case.

...

>It prints the items from the tuple each on its own line.  How can I unpack
>these three string values into three different string variables like my
>first for loop?
>  
>
x,y,z = aTuple

Enjoy yourself,
Mike

 
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/