Python functions: Lambda Expressions and filters

A lambda expression is a special type of defined function in Python that allows you to define an anonymous function. The function body of a Python lambda expression can have only one statement, which is the return value expression statement.

Syntax: Lambda parameter: return value

Unlimited number of parameters

Using lambda expressions can simplify the function definition process, and do not have to consider the problem of function naming, enhance the code readability, one arrow three Eagle

Filter filters

Syntax filter (function, sequence)

Performs a function on the object in sequence, and returns the item that executes the result of true, consisting of a list/string/tuple (depending on the type of sequence):

Filter out content that is not true

Map map

Syntax: Map (function, sequence)

Execute function on item in sequence, see Execution result form a list return

Python functions: Lambda Expressions and filters