根据值对Python字典排序

Question

I have the following program which reads from a tsv file and imports to a dictionary. I need to sort the dictionary based on jobID and its giving me this error:

AttributeError: 'dict' object has no attribute 'jobid'

  apps = {}
  for row in csvreader:
    apps[counter]= {'userid': row[0], 'time': row[1], 'jobid': row[2]}
    counter = counter + 1

  sorted_keys = sorted(apps.keys(), key=lambda x:apps.jobid)

Any an all help is appreciated.

sample output for the first three rows in the dict:

{'jobid': 'JobID', 'userid': 'UserID', 'time': 'ApplicationDate'}

{'jobid': '169528', 'userid': '47', 'time': '2012-04-04 15:56:23.537'}

{'jobid': '284009', 'userid': '47', 'time': '2012-04-06 01:03:00.003'}

Thank You!

Answer 1

看来您想使用apps[x]["jobid"]而不是apps.jobid 。

Answer 2

You should use a list for apps. Then you can sort on jobid by using the dictionary lookup syntax x['jobid']. Here it is working with sample data:

csvreader = (
    ('user1', '2pm', 2),
    ('user2', '2pm', 3),
    ('user3', '2pm', 1)
)

apps = []
for row in csvreader:
    apps.append({'userid': row[0], 'time': row[1], 'jobid': row[2]})

sorted_data = sorted(apps, key=lambda x:x['jobid'])