用子字典和随机键对字典排序

Question

help for sorting this list

from operator import itemgetter
l = [
      {'Ad28b4fac': {'url': 'http://a.com/', 'rating': 0}},
      {'cx28b4ffc': {'url': 'http://www.dbr/', 'rating': 1}}
    ]
# sort this list by rating value

I try

  sorted(l, key=lambda x : l[x]) 

try

l.sort();

thanks for any help

Answer 1

Something like

>>> sorted(l, key=lambda x : list(x.keys())[0])
[{'Ad28b4fac': {'url': 'http://a.com/', 'rating': 0}}, {'cx28b4ffc': {'url': 'http://www.dbr/', 'rating': 1}}]

The parameter to the lambda for each iteration is the dictionaries in the list l . Now we wish to sort the data on the dictionary key. So the dict.keys() function is used which will return all the keys in the dictionary. We take the first one [0] which happens to be the only key and sort based on that.