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# Reverse the key-values in a dictionary and return a new dictionary
# Assume all values in dict are unique
def reverse_dictionary(dict):
retVal = {}
keys = list(dict.keys())
for i in range(len(keys)):# for each key in input
k = keys[i] # key
v = dict[k] # value
if (v not in retVal):
retVal[v] = k
else:
print('key exists. not doing anything.')
pass
return retVal