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This article mainly explains "what is the definition of function in python". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the definition of function in python".

The function of Python has a very flexible parameter form, which can not only achieve simple calls, but also pass in very complex parameters.

First, function parameters

Second, recursive function

Third, closure function

Closure function: the subfunction is defined in the function, and finally the subfunction is defined.

Fourth, anonymous function

The general syntax of an lambda anonymous function is: func = lambda parameter sequence: return value

Fifth, thinking practice

17, complete the add_contact function.

Its function is to construct a dictionary and print the contact's name, phone_number, city, birthday, job and other information as parameters.

Set name and phone_number as position parameters.

Set city to the named keyword parameter and set its default value to 'Beijing'.

The other parameters are normal keyword parameters.

(reply keyword python17 for reference answer)

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