enumerate()
인덱스변수없이 루프돌리기
myLetter = ['A', 'B', 'C']
i=0
for myCh in myLetter:
print(i, myCh)
i +=1
for i in range(len(myLetter)):
myCh = myLetter[i]
print(i, myCh)
# 0 A
# 1 B
# 2 C
list(enumerate(myLetter))
# [(0, 'A'), (1, 'B'), (2, 'C')]
[(i, myCh) for i , myCh in enumerate(myLetter)]
for i, myCh in enumerate(myLetter): #, start=0):
print(i, myCh)
# 0 A
# 1 B
# 2 C 
