如何使用枚举为字典理解添加额外的值？

Question

I want to be able to access my_cal[30]['r'] and get all the ranges. Then access the first week with my_cal[30]['wk']

I tried this:

new_ranges = {k:{'r':value,'week':i}, for i,(k,v) in enumerate(my_cal.items(),1)}

This is the example code:

my_cal = { 'somekey':1,
            'ranges':{ 30:['08-1-2021'],
                      31: [   '08-2-2021',
                              '08-3-2021',
                              '08-4-2021',
                              '08-5-2021',
                              '08-6-2021',
                              '08-7-2021',
                              '08-8-2021'],
                      32: [   '08-9-2021',
                              '08-10-2021',
                              '08-11-2021',
                              '08-12-2021',
                              '08-13-2021',
                              '08-14-2021',
                              '08-15-2021']},
                      'lastkey':1}

Wanted result:

my_cal = { 'somekey':1,
    'ranges':{ 30:'r':['08-1-2021'],'wk':1},
                31: {'r':[   '08-2-2021',
                              '08-3-2021',
                              '08-4-2021',
                              '08-5-2021',
                              '08-6-2021',
                              '08-7-2021',
                              '08-8-2021']},{'week',2},
                      'lastkey':1},

This print does not work in this example bellow because it complains about the tuple object has no attribute items. It works fine in my real code. I don't know why it converts it to a tuple.

for key,value in my_cal.items():
    print("key is:", key, " value is:" , "\n")

Answer 1

You have some typos in your code, and one error:

1. In the definition of my_cal , you end it with a comma so that makes it the first element of a tuple. Remove that last trailing comma.

2. For new_ranges , you're doing for (k, v) in... but then you refer to it as value .

3. An extra comma , after the value part of the dict comprehension.

Also, you should be iterating over my_cal['ranges'].items() , as Barmar mentioned . Anyway, if you change that line to:

new_ranges = {k: {'r': v, 'week': i} for i, (k, v) in enumerate(my_cal['ranges'].items(), 1)}

It gives you the new_ranges you expect. You can then assign it back to ranges in my_cal to get the form you want:

my_cal['ranges'] = new_ranges

# output:

{'somekey': 1,
 'ranges': {30: {'r': ['08-1-2021'], 'week': 1},
            31: {'r': ['08-2-2021',
                       '08-3-2021',
                       '08-4-2021',
                       '08-5-2021',
                       '08-6-2021',
                       '08-7-2021',
                       '08-8-2021'],
                 'week': 2},
            32: {'r': ['08-9-2021',
                       '08-10-2021',
                       '08-11-2021',
                       '08-12-2021',
                       '08-13-2021',
                       '08-14-2021',
                       '08-15-2021'],
                 'week': 3}},
 'lastkey': 1}

---

Edit: Wrt "I want to be able to access my_cal[30]['r'] and get all the ranges. Then access the first week with my_cal[30]['wk'] " - then make the following changes after the new_ranges = {...} step:

del my_cal['ranges']  # deletes the original `ranges` key
my_cal.update(new_ranges)  # adds the new ranges

# result:
{'somekey': 1,
 'lastkey': 1,
 30: {'r': ['08-1-2021'], 'week': 1},
 31: {'r': ['08-2-2021',
            '08-3-2021',
            '08-4-2021',
            '08-5-2021',
            '08-6-2021',
            '08-7-2021',
            '08-8-2021'],
      'week': 2},
 32: {'r': ['08-9-2021',
            '08-10-2021',
            '08-11-2021',
            '08-12-2021',
            '08-13-2021',
            '08-14-2021',
            '08-15-2021'],
      'week': 3}}