Rozumienie listowe

Wprowadzenie

Podstawowa składnia

doubled = [x*2 for x in range(5)]
print(doubled)

Z warunkiem

evens = [x for x in range(10) if x % 2 == 0]
print(evens)

Przekształcanie ciągów znaków

words = ['hello', 'world']
print([w.upper() for w in words])

Zagnieżdżona list comprehension

matrix = [[1,2,3],[4,5,6]]
flat = [x for row in matrix for x in row]
print(flat)

if/else w wyrażeniu

lst = [-1, 2, -3, 4]
clipped = [x if x > 0 else 0 for x in lst]
print(clipped)

List comprehension a map/filter

nums = range(10)
result = [x**2 for x in nums if x%2==0]
print(result)

Spłaszczanie za pomocą list comprehension

nested = [[1,2],[3,4],[5]]
flat = [x for sub in nested for x in sub]
print(flat)

List comprehension z enumerate()

colors = ['red', 'green', 'blue']
indexed = [(i, c) for i, c in enumerate(colors)]
print(indexed)

List comprehension z zip()

a = [1, 2, 3]
b = [10, 20, 30]
print([x+y for x,y in zip(a,b)])

Kiedy NIE używać list comprehension

# Too complex for comprehension:
result = []
for x in range(10):
    if x > 5:
        result.append(x * x)
print(result)

Szybkie sprawdzenie

Podsumowanie

Proszę kontynuować