Which feature of Python is used for creating anonymous functions? code example

Example 1: python anonymous function

def sum ( a, b ):			# non anonymous
        return a+b
print (sum(1, 2))			# 3

sum = lambda a,b: (a+b)		# anonymous / lambda
print (sum(1, 2))			# 3

Example 2: python anonymous function

# You have to save the lambda expresion for it to work

nameOfLambda = lambda arg1, arg2: expression