python map() function

Python offers different built in functions to performs operations on data. One such function offered is map() function.

In python map() function is used to execute a each item in particular iteration.

Syntax:

map(fun, item)

function: the function is used to execute each item.

item: item in this tutorial referred has iterables there is no limit on passing the number of items, just make sure that function has one parameter for each items.

Example:

In the below function we are using the sum function two twice the numbers which is declared in the following function.

def sum(n):
    return n + n
numbers=(2,2,2)
result=map(sum, numbers)
print(list(result))

Output:
[4,4,4]

 Adding two list using lambda and map() function:

In the below example we are defining the two list and adding those two list using the map and lambda function.

a1=[1,2,3]
a2=[5,6,7]
result=map(lambda x, y : x + y, a1,a2)
print(list(result))

Output:
[6,8,10]

if statement with map() function:

In below function we are using double_odd() function to double the odd values in the given list.

def double_odd(n):
   if n%2!=0:
       return n
   else:
       return n*2
num=[2,3,4,1,5]
result=list(map(double_odd, num))
print(result)

Output:
[2,6,4,2,10]

 

 

---