[英]Python: Add value into list inside dictionary
嘗試從名為dow
的變量向weekdays:[0]
添加值。
create_data = {"startDateTime":"2015-02-23T09:05:00-0600","endDateTime":"2015-02-23T10:05:00-0600","accessories":[],"customAttributes":[{"attributeId":"3","attributeValue":""},{"attributeId":"5","attributeValue":"Yes"}],"description":"Placeholder Description","invitees":[],"participants":[],"recurrenceRule":[{"type":"weekly","interval":2,"weekdays":[0],"repeatTerminationDate":"2015-05-24T09:50:00-0600"}],"resourceId":"15","resources":["15"],"title":"","userId":"26","startReminder":"","endReminder":""}
我在添加字典和列表之間感到困惑。
嘗試了以下操作,但會清除以下錯誤;
create_data['recurrenceRule']['weekdays'] = dow
下面是錯誤。
Traceback (most recent call last):
File "api.py", line 51, in <module>
create_data['recurrenceRule']['weekdays'] = dow
TypeError: list indices must be integers, not str
我如何獲得該價值?
由於create_data['recurrenceRule']
值為列表,並且列表包含字典作為項。 因此,我們必須從列表(即字典)中獲取項目,並在其中添加weekdays
鍵。
create_data['recurrenceRule'][0]['weekdays'] = dow
create_data
是一個字典, recurrenceRule
是它的鍵之一。 然后,它的值是一個列表:
>>> create_data['recurrenceRule']
[{'repeatTerminationDate': '2015-05-24T09:50:00-0600', 'interval': 2, 'type': 'weekly', 'weekdays': 2}]
因此,要更改weekdays
您首先必須訪問列表中的第一個元素:
create_data['recurrenceRule'][0]['weekdays']=dow
^^^
這就是為什么出現此錯誤的原因:
create_data['recurrenceRule']['weekdays']
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: list indices must be integers, not str
因為您嘗試使用字符串訪問列表的索引(0、1、2 ...)。
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