python 3.7 for 迭代: range

例子1:

words = ['this','is','an','ex','parrot']

for word in words:
    print(word)

log

this
is
an
ex
parrot

例子2：

numbers = [0,1,2,3,4,5,6,7,8,9]

for number in numbers:
    print(number)

log：

0
1
2
3
4
5
6
7
8
9

例子3：

tt = range(0,10)

print(type(tt))

print(range(0,10))

print(tt)

log：

<class 'range'>
range(0, 10)
range(0, 10)

例子4:

tt = range(0,10)

print(type(tt))

print(range(0,10))

print(tt)
print("One")
for number in range(1,5):
    print(number)
print("Two")
for number in range(0,5):
    print(number)
print("Three")
for number in range(5):
    print(number)
print("Four")

log输出:

<class 'range'>
range(0, 10)
range(0, 10)
One
1
2
3
4
Two
0
1
2
3
4
Three
0
1
2
3
4
Four

参考<python基础教程 第2版>