Python Lambda Functions
A lambda function is a small anonymous function. A lambda function can take any number of arguments, but can only have one expression.
Syntax
lambda arguments : expressionThe expression is executed and the result is returned.
Examples
Basic Usage
Add 10 to argument a, and return the result:
x = lambda a : a + 10
print(x(5)) # Output: 15Multiple Arguments
Multiply argument a with argument b and return the result:
x = lambda a, b : a * b
print(x(5, 6)) # Output: 30Why Use Lambda Functions?
The power of lambda is better shown when you use them as an anonymous function inside another function.
Say you have a function definition that takes one argument, and that argument will be multiplied with an unknown number:
def myfunc(n):
return lambda a : a * n
mydoubler = myfunc(2)
print(mydoubler(11)) # Output: 22