1 import time as t
2
3 class Mytimer:
4
5 def __init__(self):
6 self.prompt = '未开始计时'
7 self.unit = ['年','月','日','时','分','秒']
8 self.begin = 0
9 self.end = 0
10 self.list=[]#定义列表存储时间差
11
12 def __str__(self):
13 return self.prompt
14
15 __repr__ = __str__
16
17 def __add__(self, other):
18 prompt = '共计用时'
19 for index in range(6):
20 if self.list[index] != 0 or other.list[index] != 0:
21 prompt += str(int(self.list[index])+ int(other.list[index]))+self.unit[index]
22 return prompt
23
24
25 #开始计时
26 def start(self):
27 print('现在开始计时……')
28 self.begin = t.localtime()
29 if self.end == 0:
30 self.prompt = '请先stop（）'
31
32 #停止计时
33 def stop(self):
34 if self.begin == 0:
35 print('请先start（）')
36 else:
37 print('停止计时！')
38 self.end = t.localtime()
39 self._cals()
40
41 #内部方法计算时间差
42 def _cals(self):
43
44 self.prompt = '总共运行了'
45 for index in range(6):
46 temp = self.end[index] - self.begin[index]
47 if temp < 0:
48 #测试高位是否有的借，没有的借的话向再高位借……
49 i = 1
50 while self.list[index-i]<1:
51 self.list[index-i] += self.borrow[index-i] - 1
52 self.list[index-i-1] -= 1
53 i += 1
54 self.list.append(self.borrow[index]+temp)
55 self.list[index-1] -= 1
56 else:
57 self.list.append(temp)
58 #由于高位随时会被借位，因此打印放在最后
59 for index in range(6):
60 if self.list[index]:
61 self.prompt += str(self.list[index]) + self.unit[index]
62 return self.prompt
