如何从 Python 字典中删除密钥？

Question

When trying to delete a key from a dictionary, I write:

if 'key' in myDict:
    del myDict['key']

Is there a one line way of doing this?

转载于:https://stackoverflow.com/questions/11277432/how-to-remove-a-key-from-a-python-dictionary

Answer 1

Use dict.pop():

my_dict.pop('key', None)

This will return my_dict[key] if key exists in the dictionary, and None otherwise. If the second parameter is not specified (ie. my_dict.pop('key')) and key does not exist, a KeyError is raised.