我正在尝试制作G.U.I.应用程序，它将每个条目的输入乘以特定值，然后将标签的文本设置为总计。
这是我当前的代码：
import Tkinter as tk
# Classes
class Application(tk.Frame):
def __init__(self):
# Create G.U.I. Framework
self.root = tk.Tk()
tk.Frame.__init__(self)
self.root.title("Job Estimator")
self.root.geometry("280x200")
# Create G.U.I. Widgets
tk.Label(self.root, text="Labour: " + unichr(163) + "40.00 x Hours") .grid(row=0, column=0, sticky=tk.W)
tk.Label(self.root, text="Travel: " + unichr(163) + "1.00 x Miles") .grid(row=1, column=0, sticky=tk.W)
tk.Label(self.root, text="Plastic: " + unichr(163) + "2.00 x Metres").grid(row=2, column=0, sticky=tk.W)
tk.Label(self.root, text="Copper: " + unichr(163) + "3.00 x Metres").grid(row=3, column=0, sticky=tk.W)
tk.Label(self.root, text="Chrome: " + unichr(163) + "4.00 x Metres") .grid(row=4, column=0, sticky=tk.W)
tk.Label(self.root, text="Total: " + unichr(163)) .grid(row=5, column=0, sticky=tk.W)
self.totalLabel = tk.Label(self.root, text="0.00")
self.totalLabel.grid(row=5, column=1, sticky=tk.W)
self.LabourInput = tk.Entry(self.root)
self.LabourInput.grid(row=0, column=1, sticky=tk.S)
self.TravelInput = tk.Entry(self.root)
self.TravelInput.grid(row=1, column=1, sticky=tk.S)
self.PlasticInput = tk.Entry(self.root)
self.PlasticInput.grid(row=2, column=1, sticky=tk.S)
self.CopperInput = tk.Entry(self.root)
self.CopperInput.grid(row=3, column=1, sticky=tk.S)
self.ChromeInput = tk.Entry(self.root)
self.ChromeInput.grid(row=4, column=1, sticky=tk.S)
CalculateButton = tk.Button(self.root, text="Calculate", command=lambda: calc.GrandTotal()).grid(row=6, column=0, sticky=tk.W)
class Calculator():
def __init__(self):
pass
def Multiply(self, number, rate):
NumFloat = float(number)
RateFloat = float(rate)
return NumFloat * RateFloat
def GrandTotal(self): # Adds each entry field to produce and return a grand total.
# Set Variables
self.LabourTotal = self.Multiply(app.LabourInput.get(), 40)
self.TravelTotal = self.Multiply(app.TravelInput.get(), 1)
self.PlasticTotal = self.Multiply(app.PlasticInput.get(), 2)
self.CopperTotal = self.Multiply(app.CopperInput.get(), 3)
self.ChromeTotal = self.Multiply(app.ChromeInput.get(), 4)
self.GrandTotal = self.LabourTotal + self.TravelTotal + self.PlasticTotal + self.CopperTotal + self.ChromeTotal
return app.totalLabel.config(text=self.GrandTotal) # Return the total value.
calc = Calculator()
app = Application()
app.mainloop()
很好，除了单击“计算”按钮并且它可以工作外，如果再次单击它，则会收到错误消息：
>>>
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python27\lib\lib-tk\Tkinter.py", line 1410, in __call__
return self.func(*args)
File "C:\Users\Stephen\Desktop\test.py", line 39, in <lambda>
CalculateButton = tk.Button(self.root, text="Calculate", command=lambda: calc.GrandTotal()).grid(row=6, column=0, sticky=tk.W)
TypeError: 'float' object is not callable
最佳答案
您正在将self.GrandTotal类的Calculator属性更改为GrandTotal函数内部的float，在以下行中-
self.GrandTotal = self.LabourTotal + self.TravelTotal + self.PlasticTotal + self.CopperTotal + self.ChromeTotal
因此，执行此行后，方法
GrandTotal被浮点数覆盖，因此当您再次单击按钮时，它尝试调用calc.GrandTotal()，但是GrandTotal现在是浮点数，因此会出错出来。您应该为浮点数使用其他名称。范例-
self.complete_total = self.LabourTotal + self.TravelTotal + self.PlasticTotal + self.CopperTotal + self.ChromeTotal
return app.totalLabel.config(text=self.complete_total) # Return the total value.
关于python - 再次单击按钮时出错，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/32868972/