Kivy TypeError - 標籤對象在Try/Except子句中不可調用

Question

因此，我試圖創建一個try/except塊來運行此代碼，他們應該能夠在彈出窗口中單擊它們以打印出答案，並且然後按計算按鈕重新打開它。然而，當我去按計算按鈕第二次，它給了我

TypeError: 'Label' object is not callable 

我把下面的代碼：

class TabSys(TabbedPanel): 
savedfiles_hydraulus = [] 
def calculate_psc_clicked(self, Cp_text, P_text, lhv_text): 
    global psychrometric_constant 
    #when they click the button which is id'd as "calculate_psc," this function 
    #will pull the values and perform the calculations 
    try: 
     psychrometric_constant = (float(Cp_text)*float(P_text))/(float(lhv_text)*float(2.26)) 
     self.psc_answer() 
    except ValueError: 
     """Needs a popup for wrong results""" 


#the popups print out the answers and offer the user an option to save or dismiss the window 
def psc_answer(self): 
    global Flag 
    Flag = False 

    #Layout 
    popupscreen = FloatLayout() 
    self.psc_notes_label = Label(text = "Psychrometric constant: (Cp*P)/(λ*MWr)", pos_hint = {"center_x": 0.5, "center_y": 0.7}) 
    self.psc_answer = Label(text = str(psychrometric_constant), pos_hint = {"center_x": 0.5, "center_y": 0.4}) 
    popupscreen.add_widget(self.psc_notes_label) 
    popupscreen.add_widget(self.psc_answer) 

    #Dismiss Window 
    self.cancel_psc_answer = Button(text = "Cancel", pos_hint = {"center_x": .575, "center_y": .065}, size_hint = (.3, .2)) 
    self.cancel_psc_answer.bind(on_release = self.dismisspsc) 
    popupscreen.add_widget(self.cancel_psc_answer) 

    #Window Setup 
    self.popup = Popup(title="Result", content = popupscreen, size_hint=(.5, .5), size=(400, 400), 
    separator_color = [217/255, 179/255, 255/255., .85]) 
    self.popup.open() 

#Dismiss Function 
def dismisspsc(self, *args): 
    self.popup.dismiss() 

它是相當多的，不幸的是，但我儘可能多地剪掉。如果有人需要，我可以將pastebin與全部代碼鏈接起來，因爲我現在擁有它。

我認爲這個問題可能是該行

try: 
    psychrometric_constant = (float(CP_text)*float(P_text))/(float(lhv_text)*float(2.26)) 

是在try/except塊，它可以更好地psc_answer的函數內即成。

非常感謝:)

Answer 1

我找到了答案！如果有人遇到這個問題，那可能是因爲你已經爲不可用對象使用了相同的名稱，就像你在某個時候對某個函數使用了相同的名稱。我已經命名了函數psc_answer和標籤psc_answer。