Exercises with map, filter, reduce without using list comprehension (which is not very pythonic but interesting).

Playing with map, filter & reduce in... Python3 -_-.py

TEMPERATURES = [37, 42, -24, 39]

def fahrenheit(T):
    return ((float(9)/5)*T + 32)

def celsius(T):
    return (float(5)/9)*(T-32)


print(list(map(fahrenheit, TEMPERATURES)))
print(list(map(lambda x: float(9)/5*x + 32, TEMPERATURES)))

litterature = [10.0, 11.5, 13.6, 17.3]
math = [13.4, 15.4, 17.5, 19.2]

print(list(map(lambda x, y: (x+y)/2, litterature, math)))

alphabet = ["a", "b", "c", "d"]
numerique = [1, 2, 3, 4]


print(list(map(lambda x, y, z: x*y*z, alphabet, numerique, numerique)))

from math import cos, sin, tan
def map_functions(x, functions):
    return [func(x) for func in functions]

print(map_functions(1, (cos, sin, tan)))

fibonacci = [0,1,1,2,3,5,8,13,21,34,55]

print(list(filter(lambda x: x % 2 == 0, fibonacci)))

from functools import reduce

print(reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]))