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  1. salary_data = {"John D": {"wage":10000, "gender":"male"}, "Peter A":{"wage":12000, "gender":"male"}, "Emma":{"wage":5000, "gender":"female"}}
  2.  
  3. print sorted(salary_data, key=lambda k:salary_data[k]['wage'])
Success #stdin #stdout 0.02s 9016KB
stdin
Standard input is empty
stdout
['Emma', 'John D', 'Peter A']