A lambda function is a small anonymous function.
A lambda function can take any number of arguments, but can only have one expression.
lambda arguments : expression
Lambda Example 1
The expression is executed and the result is returned:
A lambda function that adds 10 to the number passed in as an argument, and print the result:
x = lambda a : a + 10 print(x(5))
Lambda Example 2
Lambda functions can take any number of arguments:
A lambda function that multiplies argument a with argument b and print the result:
x = lambda a, b : a * b print(x(5, 6))
Lambda Example 3
A lambda function that sums argument a, b, and c and print the result:
x = lambda a, b, c : a + b + c print(x(5, 6, 2))
Lambda Return as Function part1
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:
Use that function definition to make a function that always doubles the number you send in:
def myfunc(n): return lambda a : a * n mydoubler = myfunc(2) # lambda a : a * 2 print(mydoubler(11))