gistfile1.py

example_dict = {}  #creating an empty dictionary

# Only need to do this if we haven't already seen 'blue'
if 'blue' not in example_dict:
    example_dict["blue"] = set() #Mapping "blue" to an empty set

example_dict["blue"].add("JJ") #Adding "JJ" to "blue"'s empty set

example_dict["blue"].add("NN") #Adding "NN" to "blue"'s empty set
#if you call the above line twice, only one "NN" will be in the set, because sets don't duplicate elements.

print len(example_dict["blue"]) #Print the size of "blue"s tag set, which is its simple ambiguity

ambiguities = {} #new dictionary that's going to hold the ambiguities of tokens

for token, tagset in example_dict.iteritems(): #iterate over all key-value pairs in our dict
    ambiguities[token] = len(tagset)

print ambiguities

# once you have written simple_pos_ambiguity you can do the following...
ambiguities = simple_pos_ambiguity()
print ambiguities["blue"]