类型错误，但这两个变量都是整数

Question

代码如下：

这里声明了startTime和endTime。我不确定是否应该使用IntVar或StringVar，因为它们以前不起作用。你知道吗

startTime = str
endTime = str

def start1():
    Canvas1 = Canvas(ReactionTest,width = 500,height = 450)
    Canvas1.grid(row=4,column=0,columnspan=3,pady=10)
    image_1 = PhotoImage(file="photo_1.gif")
    Canvas1.create_image(0,0,anchor=NW, image=image_1)
    Canvas1.image_1=image_1
    startTime = time.strftime('%S')
def end1():
    endTime = time.strftime('%S')
    calctimeTaken = int(endTime) - int(startTime)
    timeTaken = str(calctimetaken)

回溯：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\brent\AppData\Local\Programs\Python\Python36\lib\tkinter\__init__.py", line 1702, in __call__
    return self.func(*args)
  File "C:\Users\brent\OneDrive\Desktop\Computer Science\Program\WonderWalls Program.py", line 810, in end1
    calctimeTaken = int(endTime) - int(startTime)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'type'

Answer 1

我认为问题是你的变量不是全局变量，你只在函数中声明变量。 请尝试使用以下代码：

startTime = 0
def start1():
    global startTime
    Canvas1 = Canvas(ReactionTest,width = 500,height = 450)
    Canvas1.grid(row=4,column=0,columnspan=3,pady=10)
    image_1 = PhotoImage(file="photo_1.gif")
    Canvas1.create_image(0,0,anchor=NW, image=image_1)
    Canvas1.image_1=image_1
    startTime = time.strftime('%S')
def end1():
    global startTime
    endTime = time.strftime('%S')
    calctimeTaken = int(endTime) - int(startTime)
    timeTaken = str(calctimetaken)