python lambda

1add = lambda a, b : a + b
2add(3,6) ## 9

1multiply = lambda x,y: x * y
2multiply(21, 2) #42
3#_____________
4def myfunc(n):
5  return lambda a : a * n
6
7mydoubler = myfunc(2)
8print(mydoubler(11)) #22

1nums = [1, 2, 3, 4, 5]
2
3
4print(list(map(lambda n:n*n, nums)))
5#lambda n : n in this case is the passed value

1even = lambda a: True if a % 2 == 0 else False
2even(6) ## True
3even(9) ## False

1Lamda is just one line anonymous function
2Useful when writing function inside function
3it can take multiple arguments but computes only one expression
4
5Syntax:
6   x = lambda arguments : expression

1>>> sum = lambda x, y : x + y
2>>> sum(3,4)
37
4