小甲鱼44课时——飞秒级计时器
代码：import time as t
class Timer():
def __init__(self):
self.prompt = '未计时！'
self.lasted = []
self.begin1 = 0 #1指精确到毫秒微秒。。。
self.end1 = 0
self.begin2 = 0 #2指精确到秒，localtime的精确度
self.end2 = 0
self.last = 0
self.unit = ['年','月','天','小时','分钟','秒']
self.united =
def start(self):
if self.begin1 is not 0 and not self.end1:
print('计时未停止，请先运行stop结束计时')
else:
self.begin1 = t.time()
self.begin2 = t.gmtime(self.begin1)
print('开始计时...')
def stop(self):
if self.begin1 == 0:
print('未开始计时，请先运行start')
else:
self.end1 = t.time()
self.end2 = t.gmtime(self.end1)
print('停止计时...')
self._calc()
#内部方法，计算运行时间
def _calc(self):
self.lasted = []
self.prompt = '总共运行了：' #先实现数组self.lasted[]，再依次把数组中的元素添加进显示
for index in range(6):
if (self.end2 - self.begin2) < 0: #检测是否时间出现负值，若有则修改成易读的显示界面
self.lasted -= 1
self.lasted.append(self.united + (self.end2 - self.begin2))
else:
self.lasted.append(self.end2 - self.begin2)
self.last = self.end1 - self.begin1
for index in range(6): #将数组中的元素添加进显示
if self.lasted == 0:
pass
else:
if index == 5:
self.prompt += str(self.last) + self.unit
else:
self.prompt += str(self.lasted) + self.unit
#重写魔法方法，可直接输出时间
def __str__(self):
return self.prompt
__repr__ = __str__ #把repr直写成和str一样的
def __add__(self,other):
prompt = '相加的和是：'
total1 = self.last + other.last
total2 = t.gmtime(total1)
total3 = []
total4 =
for index in range(6):
total3.append(total2)
total5 = list(map(lambda x:x - x , zip(total3,total4)))
for index in range(6):
if total5:
if index == 5:
prompt += str(total1 % 10) + self.unit
else:
prompt += str(total5) + self.unit
else:
pass
return print(prompt)
结果:
>>> a=Timer()
>>> a.start()
开始计时...
>>> a.stop()
停止计时...
>>> a
总共运行了：5.423726797103882秒
>>> b=Timer()
>>> b.start()
开始计时...
>>> b.stop()
停止计时...
>>> b
总共运行了：3.464120388031006秒
>>> a+b
相加的和是：8.887847185134888秒
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