Ah. Turns out I was just sloppy and/or stupid. I realized I had another
error once I fixed the '==' part.
My new code which seems to work is...
elif choice == "8":
print ("Find the grandson of a person in the list.")
grandfather = input("Which father do you want to look up to see if
he is a grandfather? ")
if grandfather in pairs:
father = pairs[grandfather]
grandson = pairs[father]
print (grandfather, "is the grandfather of", grandson, ".")
else:
print ("\nSorry.", grandfather, "is not a grandfather. Try
again.")
Thanks all.
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-----Original Message-----
From: David [mailto:bouncingc...@gmail.com]
Sent: Saturday, December 11, 2010 6:35 PM
To: Al Stern
Cc: tutor@python.org
Subject: Re: [Tutor] Dictionaries - Using 1 Key:Value to find another
On 12 December 2010 11:10, Al Stern <albst...@gmail.com> wrote:
>
> I thought father got defined in the
>
> father == pairs[grandfather]
> line. I have tried it a couple different ways but always get the father
is
> not defined error once I enter the name.
I only glanced at your code, but maybe you have some typos there:
father == pairs[grandfather]
for father in pairs:
grandson == pairs[father]
should probably be
father = pairs[grandfather]
for father in pairs:
grandson = pairs[father]
Try that.
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