how to sort a list of key-value stores by a specific key?

Question

suppose the input is like this:

"[{'ability': 18, 'spin': -14, 'strike': 0, 'purity': 5, 'power': 257}, {'ability': -6, 'spin': 147, 'strike': -17, 'purity': 6, 'power': 288}, {'ability': 9, 'spin': 272, 'strike': 10, 'purity': 8, 'power': 256}, {'ability': 0, 'spin': 138, 'strike': -6, 'purity': 19, 'power': 205}]"

I have to sort the input based on the values at the key "ability".

def sort_kvs(lsts):
      l = len(lsts)
      sort = []
      smallest = lsts[0]["ability"]
      for i in range (l):
        if lsts[i]["ability"] < lsts[0]["ability"]:
          smallest = lsts[i]["ability"]
          small = lsts[i]
          sort.append(small)
      return sort

I want the output like this:[{'ability': -6, 'spin': 147, 'strike': -17, 'purity': 6, 'power': 288}, {'ability': 0, 'spin': 138, 'strike': -6, 'purity': 19, 'power': 205}, {'ability': 9, 'spin': 272, 'strike': 10, 'purity': 8, 'power': 256}, {'ability': 18, 'spin': -14, 'strike': 0, 'purity': 5, 'power': 257}]

score 0 · Answer 1 · answered Apr 24 '19 at 02:12

Use sorted with a custom key:

>>> l = [{'ability': 18, 'spin': -14, 'strike': 0, 'purity': 5, 'power': 257}, {'ability': -6, 'spin': 147, 'strike': -17, 'purity': 6, 'power': 288}, {'ability': 9, 'spin': 272, 'strike': 10, 'purity': 8, 'power': 256}, {'ability': 0, 'spin': 138, 'strike': -6, 'purity': 19, 'power': 205}]
>>> list(sorted(l, key=lambda x: x["ability"]))
[{'ability': -6, 'spin': 147, 'strike': -17, 'purity': 6, 'power': 288}, {'ability': 0, 'spin': 138, 'strike': -6, 'purity': 19, 'power': 205}, {'ability': 9, 'spin': 272, 'strike': 10, 'purity': 8, 'power': 256}, {'ability': 18, 'spin': -14, 'strike': 0, 'purity': 5, 'power': 257}]

No need to wrap sorted with list if it is python2

score 0 · Answer 2 · answered Apr 24 '19 at 02:13

sorted(data, key=lambda x: x['ability'])

output:

{'ability': -6, 'spin': 147, 'strike': -17, 'purity': 6, 'power': 288}
{'ability': 0, 'spin': 138, 'strike': -6, 'purity': 19, 'power': 205}
{'ability': 9, 'spin': 272, 'strike': 10, 'purity': 8, 'power': 256}
{'ability': 18, 'spin': -14, 'strike': 0, 'purity': 5, 'power': 257}

how to sort a list of key-value stores by a specific key?

2 Answers2