CODEWITHSUNDEEP
pythondictionary
doyz
doyz

Reputation: 886

Python: How to iterate through a dictionary using a list, instead of counter

I have a dictionary with the following structure:

results =

 {1: {'A': 10,
     'B' : 11,
     'C': 12},
 5: {'A': 20,
     'B' : 21,
     'C': 22}}

I have tried to iterate through this dictionary using this for loop:

total_A = []
for key in results:
  total_A.append(results[key]["A"])
  print total_A

But it is not working, because it is inputting key as 1 and 2 each time it loops. How am i able to iterate through the results dictionary using index as 1 and 5? (they are of type integer)

Upvotes: 1

Views: 138

Answers (2)

Hannu
Hannu

Reputation: 12205

Try this. It will loop through your dictionary keys. 

for key in results.keys():

Like this:

total_A = []
for key in results.keys():
  total_A.append(results[key]["A"])

print total_A

Result is

[10, 20]

Upvotes: 3

viggo
viggo

Reputation: 536

In your case you could do

for key, value in results.items(): total_A.append(value["A"])

Then value will contain the value of the dictionary element, and you don't have to do the results[key] lookup explicitly.

Upvotes: 0

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