Learn Partial functions Python programming

Learn Partial functions Python programming: You can create partial functions in python by using the partial function from the functools library.

Partial functions allow one to derive a function with x parameters to a function with fewer parameters and fixed values set for the more limited function.

Import required:

from functools import partial

This code will return 8.

from functools import partial

def multiply(x,y):
        return x * y

# create a new function that multiplies by 2
dbl = partial(multiply,2)
print(dbl(4))

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An important note: the default values will start replacing variables from the left. The 2 will replace x.

y will equal 4 when dbl(4) is called. It does not make a difference in this example, but it does in our next example below.

Exercise

Learn Partial functions in Python:

Edit the function provided by calling partial() and replacing the first three variables in func(). Then print with the new partial function using only one input variable so that the output equals 60.

Answer code:

# this is the answer code. try coding
# answer yourself below.
from functools import partial
def func(u,v,w,x):
    return u*4 + v*3 + w*2 + x

p = partial(func,5,6,7)
print(p(8))

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About the Author: Bernard Aybout

In the land of bytes and bits, a father of three sits, With a heart for tech and coding kits, in IT he never quits. At Magna's door, he took his stance, in Canada's wide expanse, At Karmax Heavy Stamping - Cosma's dance, he gave his career a chance. With a passion deep for teaching code, to the young minds he showed, The path where digital seeds are sowed, in critical thinking mode. But alas, not all was bright and fair, at Magna's lair, oh despair, Harassment, intimidation, a chilling air, made the workplace hard to bear. Management's maze and morale's dip, made our hero's spirit flip, In a demoralizing grip, his well-being began to slip. So he bid adieu to Magna's scene, from the division not so serene, Yet in tech, his interest keen, continues to inspire and convene.