Python : Comprehension

python 다운?

list comprehension

---

list_num = []
for number in range(10) :
	list_num.append(number)
print(list_num)

print(list(range(10))
'''

> [ 표현식 for 항목 in (순회 가능한 객체)]

list_num = [number for number in range(10)]

if문을 추가할 수도 있다

list_num = [n for n in range(10) if n % 2 == 0]

dictionary comprehension

---

{key : value for -- in --}

text = 'hello world, hello'
letter_count = {}
letter_count = {ch : text.count(ch) for ch in text}
print(letter_count)