我試圖制作一個 CPS 計數(shù)器，當(dāng)我達到 100 次點擊時，它應(yīng)該打印“測試”并打印達到 100 次點擊所花費的時間。但它總是給出 0.0 作為時間輸出。import tkinterimport timecounter = tkinter.Tk()clicks = 0def addClick(): global clicks clicks = clicks + 1 lbl.configure(text=clicks) start = time.time() if clicks == 100: print("test") end = time.time() print(start - end)lbl = tkinter.Label(counter, text = clicks)lbl.pack()btn = tkinter.Button(counter, text="Click here", command=addClick)btn.pack()counter.mainloop()
1 回答
慕勒3428872
TA貢獻1848條經(jīng)驗 獲得超6個贊
...
start = time.time()
if clicks == 100:
print("test")
end = time.time()
print(start - end)
start每次單擊后您都會重新啟動。一種可能的解決方案是僅在第一次單擊后啟動它。這也需要start是一個全局變量。
還要注意你應(yīng)該做的end - start，不是start - end。
clicks = 0
start = None
...
global clicks
global start
...
if clicks == 1:
# instantiating 'start' only if it was the first click
start = time.time()
elif clicks == 100:
print("test")
end = time.time()
print(end - start)
然而，使用全局變量是一種代碼味道和反模式，我們在這么小的程序中已經(jīng)有 2 個了。
您可以嘗試將它們包裝在數(shù)據(jù)結(jié)構(gòu)中，例如dict：
import tkinter
import time
counter = tkinter.Tk()
data = {'clicks': 0, 'start': None}
def addClick():
data['clicks'] += 1
lbl.configure(text=data['clicks'])
if data['clicks'] == 1:
# instantiating 'start' only if it was the first click
data['start'] = time.time()
elif data['clicks'] == 100:
print("test")
end = time.time()
print(end - data['start'])
lbl = tkinter.Label(counter, text=data['clicks'])
lbl.pack()
btn = tkinter.Button(counter, text="Click here", command=addClick)
btn.pack()
counter.mainloop()
另一個適合現(xiàn)實世界的解決方案是將整個 tkinter 應(yīng)用程序包裝在一個類中，該類可以跟蹤其自身狀態(tài)。
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