Lambda

In Python, anonymous function means that a function is without a name. As we already know that def keyword is used to define the normal functions and the lambda keyword is used to create anonymous functions. It has the following syntax:

A lambda function that adds 10 to the number passed in as an argument, and print the result:

x = lambda a : a + 10
y=10
print(x(y)) 

Lambda functions can take any number of arguments.

x = lambda a, b : a * b
print(x(5, 6)) 

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)) 

Why 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

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)
print(mydoubler(11))

Or, use the same function definition to make a function that always triples the number you send in:
def myfunc(n):
  return lambda a : a * n

mytripler = myfunc(3)

print(mytripler(11))

def myfunc(n):
  return lambda a : a * n

mydoubler = myfunc(2)
mytripler = myfunc(3)

print(mydoubler(11))
print(mytripler(11))