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This article mainly introduces how python uses the anonymous function lambda. It is very detailed and has certain reference value. Friends who are interested must finish reading it.

Anonymous function lambda

Anonymity means that a function is no longer defined in such a standard form as a def statement.

Lambda is just an expression, and the body of the function is much simpler than def.

The body of lambda is an expression, not a block of code. Only limited logic can be encapsulated in lambda expressions.

The lambda function has its own namespace and cannot access parameters outside its own parameter list or in the global namespace.

Although the lambda function looks like it can only write one line, it is not the same as C or C++ 's inline function, which is designed to increase efficiency by not consuming stack memory when calling small functions.

Syntax:

Lambda [arg1 [, arg2,.argn]]: expression

Example:

# description of writable functions sum = lambda arg1, arg2: arg1 + arg2 # call the sum function print ("the added value is:", sum (10,20)) print ("the added value is:", sum (20,20)) the added value is: 30 the added value is: what can 40python do? Python is a programming language with many effective tools, Python is almost omnipotent, and the language is easy to understand, easy to get started, and powerful. It has a wide range of applications in many fields, such as big data analysis, artificial intelligence, Web development and so on.

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