fonctions map et filter en python

#traitement map
map(lambda x: 2*x, range(10))

#equivalent à
[2*x for x in range(10)]

#traitement filter
filter(lambda x: x>5, range(10))

[x for x in range(10) if x>5]

ages = range(30)
majeurs = filter(lambda x: x > 18, ages)
 

majeurs = [a for a in ages if a > 18]

#map et filter
map(lambda x: 2*x, filter(lambda x: x>5, range(10)))

#ou

[2*x for x in range(10) if x>5]

filter(lambda x: x>5 and x<8, range(10))
#ou
[x for x in range(10) if x>5 and x<8]