不是最近在学think Python嘛，失败的是已经完全按照作者答案的算法改写了程序，竟然还是得到的结果不一样。一句一句地分析，花了很长时间，才发现是return语句用错了，放在了程序中间，导致程序提前结束，后边的语句不可能执行的，也是醉了。
def is_pallindrome_number():
list = []
for i in range(198888, 200000):
#print(i)
j = str(i)
if j[::-1][:4] == j[2:]:
#print(i)

            if str(i + 1)[::-1][:5] == str(i + 1)[1:]:
                #print(i)
                if str(i + 2)[::-1][1:5] == str(i + 2)[1:5]:
                    #print(i)
                    
                    if str(i + 3)[::-1] == str(i + 3):
                        #print(i)
                        list.append(i)
                        #这是才开始我的return语句位置return list
    return list 

作者的代码：
from future import print_function, division

def has_palindrome(i, start, length):
"""Checks if the string representation of i has a palindrome.

i: integer
start: where in the string to start
length: length of the palindrome to check for
"""
s = str(i)[start:start+length]
return s[::-1] == s


def check(i):
"""Checks if the integer (i) has the desired properties.

i: int
"""
return (has_palindrome(i, 2, 4) and
has_palindrome(i+1, 1, 5) and
has_palindrome(i+2, 1, 4) and
has_palindrome(i+3, 0, 6))


def check_all():
"""Enumerate the six-digit numbers and print any winners.
"""
i = 100000
while i <= 999996:
if check(i):
print(i)
i = i + 1


print('The following are the possible odometer readings:')
check_all()
print()