Map python 3

Python map function

# The map function applies a function to every item in a list,
# and returns a new list.

numbers =  [0, -1, 2, 3, -4]

def square_func(n):
    return n*n
 
new_numbers = list(map(square_func, numbers))
#new_numbers: [0, 1, 4, 9, 16]

Map in python

# Python program to demonstrate working 
# of map. 
  
# Return double of n 
def addition(n): 
    return n + n 
  
# We double all numbers using map() 
numbers = (1, 2, 3, 4) 
result = map(addition, numbers) 
print(list(result))
# result [2, 4, 6, 8]

Map python 3

from multiprocessing import Pool

def test( v ):
    print(v)
    return v

if __name__ == '__main__':
    with Pool(2) as p:
        print(p.map(test, range(5)))

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