Enumerate & Zip

(1) Enumrate : List의 element를 추출할 때 번호를 붙여서 추출

for i, v in enumerate(['tic', 'tac', 'toe']):
    print(i, v)

Output : 

0 tic

1 tac

2 toe

(2) Zip : 두 개의 list의 값을 병렬적으로 추출함

alist = ['a1', 'a2', 'a3']
blist = ['b1', 'b2', 'b3']
 
for(a, b) in zip(alist, blist):
    print(a, b)

Output : 

a1 b1

a2 b2

a3 b3

* list + zip

a, b, c = zip((1, 2, 3), (10, 20, 30), (100, 200, 300))
print(a, b, c)
 
print([sum(x) for x in zip((1, 2, 3), (10, 20, 30), (100, 200, 300))])

Output : 

(1, 10, 100) (2, 20, 200) (3, 30, 300)

[111, 222, 333]

* enum + zip

alist = ['a1', 'a2', 'a3']
blist = ['b1', 'b2', 'b3']
 
for(a, b) in zip(alist, blist):
    print(a, b)
 
for i, (a, b ) in enumerate(zip(alist, blist)):
    print(i, a, b)

Output : 

0 a1 b1

1 a2 b2

2 a3 b3