我为这个作业获得了这段代码:
from stop_watch import StopWatch
size = 1000000
stopWatch = StopWatch()
sum = 0
for i in range(1, size + 1):
sum += i
stopWatch.stop()
print("The loop time is", stopWatch.get_elapsed_time(), "milliseconds")
我必须创建一个生成秒表的类,这是我的代码:
import time
class StopWatch:
def __init__(self):
pass
def start(self):
self.start = time.time()
return self.start
def stop(self):
self.stop = time.time()
return self.stop
def get_elapsed_time(self):
print(str(self.stop-self.start))
我收到此错误:
File "week33.py", line 10, in <module>
print("The loop time is", stopWatch.get_elapsed_time(), "milliseconds")
File "/Users/Marinkton/Desktop/stop_watch.py", line 16, in get_elapsed_time
print(str(self.stop-self.start))
TypeError: unsupported operand type(s) for -: 'float' and 'method'
我做错了什么?我发现了一个错误。
答案 0 :(得分:5)
您不能将您的功能和属性命名为相同的内容。执行self.stop = time.time()
后,您将覆盖函数stop
。
您需要更改内部字段的名称。
import time
class StopWatch:
def __init__(self):
self.start_time = 0
self.stop_time = 0
def start(self):
self.start_time = time.time()
return self.start_time
def stop(self):
self.stop_time = time.time()
return self.stop_time
def get_elapsed_time(self):
print(str(self.stop_time - self.start_time))
PS:你永远不会在你的代码中调用start。