key=lambda x:
时间: 2023-10-17 16:06:02 浏览: 47
Lambda functions are anonymous functions in Python that can be created without a name. They are defined using the keyword "lambda" followed by the input parameters and the expression to be evaluated.
In the context of "key=lambda x:", this means that a lambda function is being used as the key argument in a function call, likely for sorting or organizing data in a specific way.
The "x" in this lambda function represents the input parameter, and the expression following the colon specifies what the lambda function will do with that parameter.
For example, if we had a list of dictionaries representing people with their ages, we could use "key=lambda x: x['age']" to sort the list of dictionaries by each person's age. The lambda function would take each dictionary as input (represented by "x"), and sort them based on the value associated with the key "age".
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