> father_son = {"Kirk Douglas" : "Michael Douglas",
> "James Brolin" : "Josh Brolin",
> "Bob Dylan" : "Jakob Dylan"}
>
> elif choice == "2":
> print "LIST OF ALL FATHERS\n"
> for father_son in father_son:
> print father_son
You are replacing the reference to the dictionary with
a single key entry here. You probably intended
for father in father_son:
print father
> # look up father-son pairs
> elif choice == "3":
> term = raw_input("Type in the name of the father of this pair: ")
> if term in father_son:
father_son is no longer the dictionary but refers to the last father!
It should work if you don't list the fathers first! :-)
> elif choice == "4":
> term = raw_input("Type in the name of the father you want to add:
> ")
> if term not in father_son:
> definition = raw_input("Type in the name of this person's son:
> ")
> father_son[term] = definition
As a wee point, its usually considered a bad idea to name variables
after their syntax meaning rather than their meaning in the program.
Thus this would be better written:
father = raw_input(...)
if father not in father_son:
son = raw_input(...)
father_son[father] = son
HTH,
Alan G
Author of the learn to program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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