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

[Dave Kuhlman]

Amy G wrote:

> I have a whole bunch of tuples that look something like this,
> 
> aTuple = ('1074545869.6580.msg', 't_bryan_pw at gmcc.ab.ca', 'Your
> one stop prescriptions')
> 
> now that I have this I try
> 
> 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. If I do...

The "for" statement processes each item in a sequence object.  The
first object in your sequence object (aTuple) is a string.  The
string has more that three characters.  So, that string cannot be
unpacked into your three variables x, y, and z.

In contrast, consider the following:

    >>> value = (('aa', 'bb', 'cc'), ('dd', 'ee', 'ff'))
    >>> for x, y, z in value:
        print 'x:', x
        print 'y:', y
        print 'z:', z
        
    x: aa
    y: bb
    z: cc
    x: dd
    y: ee
    z: ff
    >>> 

In this example, the first item in the tuple is itself a tuple
with three items.  Therefore, it can be unpacked into the
variables x, y, and z.

Dave

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