Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)] on win32
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>>> range(4)
range(0, 4)

>>> a = range(4)
>>> type(a)
<class 'range'>

>>> b = list(range(4))
>>> b
[0, 1, 2, 3]
>>> type(b)
<class 'list'>

a = range(6) ?# list(a): [0, 1, 2, 3, 4, 5]
new = []
for i in reversed(a):
? ? new.append(i)
print(new) ?# [5, 4, 3, 2, 1, 0]

new =[]
for i in range(5, -1, -1):
? ? new.append(i)
print(new) ?# [5, 4, 3, 2, 1, 0]

a=[1,2,4,2,4,5,7,10,5,5,7,8,9,0,3]
a.sort()
last=a[-1]
for i in range(len(a)-2,-1,-1):
? ? if last==a[i]:
? ? ? ? del a[i]
? ? else:
? ? ? ? last=a[i]
print(a) ? ? ? ? ? ?# [0, 1, 2, 3, 4, 5, 7, 8, 9, 10]

a = [1, 2, 4, 2, 4, 5, 7, 10, 5, 5, 7, 8, 9, 0, 3] ?# length : 15
a.sort()
print(a) ? ? ? # [0, 1, 2, 2, 3, 4, 4, 5, 5, 5, 7, 7, 8, 9, 10]
last = a[-1]
print(last) ? ?# 最后一個(gè)元素是last,最開(kāi)始時(shí)為10
# 從index=13(倒數(shù)第2個(gè))(包含)開(kāi)始,倒著數(shù),到 index=-1 (不含)
# 或者說(shuō):從下標(biāo)index=13(含),到index=-1(不含)相當(dāng)于到index=0(含)
for i in range(len(a)-2, -1, -1):
? ? if last == a[i]: ? ?# ?將最后一個(gè)元素 分別與 其他元素比較大小
? ? ? ? del a[i] ? ? ?# 相同就刪掉
? ? else:
? ? ? ? last = a[i] ? ? # 不同就把當(dāng)前元素賦值傳給last
print(a)

range(begin, end, step)

# range(begin, end, 方向)  范圍為： [begin, end) 即 [3, 2, 1]
for i in range(3, 0, -1):
    print(i)
print('\n')
# 范圍為 [3, 2, 1, 0]
for i in range(3, -1, -1):
    print(i)
 
#========== 結(jié)果 ==========#
3
2
1
 
3
2
1
0

for i in reversed(range(10)):
    print(i)
"""
輸出結(jié)果：
9
8
7
6
5
4
3
2
1
0
"""