Lazy list/range comprehensions

[bearophile]

SiegeLord:

> Back when I was programming Python I found the array comprehension syntax unreadable, so I always used the map equivalent.

Python devs have introduced list comps only after asking about their "ergonomicity" level to many people. And for most of those people code like this:

result1 = [x * x + 5 for x in xrange(10)]
result2 = {x: x * x for x in xrange(20)}

Allows the programmer to see code purpose better and create higher-level mental chunks than code like:

result1 = map(lambda x: x * x + 5, xrange(10))
result2 = {}
for x in xrange(20):
    result2[x] = x * x

Bye,
bearophile