Python，从由键组成的字典中提取信息，其中值是3元组

Question

I have a MapReduce program that returns the results of the computation as a dict that looks like the following:

{'pods': (54802L, 25417L, 59877L), 'sash': (160573L, 97199L, 178836L), ...}

I am trying to pull the items in this dictionary to make use of the values in the 3-tuples, but I keep receiving an error KeyError: 0 when trying to parse through the errors in the code shown below (specifically on this line key, indicies = results[i] )

bloomFilter = [False] * 200000
for i in range(0, len(results)):
    key, indicies = results[i]
    bloomFilter[indicies[1]] = True
    bloomFilter[indicies[2]] = True
    bloomFilter[indicies[3]] = True

What is the proper way to pull the information from the dict so that I can make use of the values in the 3-tuples?

Also, can I use L values as indicies in a array, or do I need to cast them to ints?

Answer 1

I would iterate over the results dictionary like so:

for key in results:
    indices = results[key]
    bloomFilter[indices[0]] = True
    bloomFilter[indices[1]] = True
    bloomFilter[indices[2]] = True

Note also that the indices tuple is zero-indexed, meaning you'll need to extract the values starting with zero (not one) like the above code shows.