Worthwhile to reverse a dictionary

[rudysanford at hotmail.com]

Thanks so much.  That seems to have it.  This is the sort of thing I
had before:


#!/usr/local/bin/python



# make a short dictionary
d1 = {'A' : '1', 'B' : '2', 'C' : '3'}

for letter in d1.keys(): print letter, '\t', d1[letter]

# make a space between the output of the 2 dictionaries
print '\n'


# reverse the keys and values from the first dictionary
# from this point many things were tried, about the best I achieved was
# getting the last key/value pair as displayed when printing the d1
# it was properly reversed but there was only one pair
d2 = {d1[letter] : letter}

for num in d2.keys():  print num, '\t', d2[num]


This displays
A     1
C     3
B     2

2     B