Question

我正在尝试使用Python和Tkinter界面图形制作BMI计算器

这是我的代码：

def createButtons(self):

    self.buttonCalculate = tk.Button(self)
    self.buttonCalculate["text"]="Calculate"
    self.buttonCalculate["fg"]="red"
    self.buttonCalculate["bg"]="yellow"
    self.buttonCalculate["font"]=("arial","16","italic","bold")
    self.buttonCalculate["height"]=3
    self.buttonCalculate["width"]=15
    self.buttonCalculate["command"]=self.actionPrint
    self.buttonCalculate.pack(side="top")

    self.buttonExit = Button(self,text="Exit",fg="red",bg="blue",command=root.destroy)
    self.buttonExit.pack(side="bottom")

def createLabels(self):
    self.label = tk.Label(self)
    self.label["font"]=("arial","16","italic","bold")
    self.label["height"]=3
    self.label["width"]=45
    self.label["text"]="Type your weight(kg) and your height(cm) respectively"
    self.label.pack(side="left")

def dataEntry1(self):
    self.edit = tk.Entry(self.master,width=35)
    self.edit.grid(row=2,column=0)

def dataEntry2(self):
    self.edit = tk.Entry(self.master,width=35)
    self.edit.grid(row=1,column=0)

def actionPrint(self):
    print("Test")

def dataCalculation(self):

    dataCalculation=(self.dataEntry1/(self.dataEntry2*self.dataEntry2))
    print("your BMI is: ", dataCalculation)

root = tk.Tk()

TypeError：*：'instancemethod'和以下不支持的操作数类型 'instancemethod'

没有Erro出现，但是它不起作用，我没有得到我要计算的BMI值

如何获取数据？

Answer 1

发生标题错误是因为您尝试在方法之间进行数学运算。

您要做的是使用Entry中包含的值进行操作。

您可能应该有类似的东西：

def createButtons(self):
    self.buttonCalculate = tk.Button(self)
    [...]
    self.buttonCalculate["command"] = self.dataCalculation
    [...]

# set the entries: these two method are likely called in a ``__init__`` or setup method
def set_data_entry1(self):
    self.edit1 = tk.Entry(self.master,width=35)
    self.edit1.grid(row=2,column=0)

def set_data_entry2(self):
    self.edit2 = tk.Entry(self.master,width=35)
    self.edit2.grid(row=1,column=0)

# callback for e.g. a button: get the values of the two entries, converted them to float and do the operations
def dataCalculation(self):
    dataCalculation=(self.get_data_entry1())/(self.get_data_entry2() * self.get_data_entry2())
    print("your BMI is: ", dataCalculation)

def get_data_entry1(self):
    return float(self.edit1.get())

def get_data_entry2(self):
    return float(self.edit2.get())

TypeError：*：'instancemethod'和'instancemethod'不受支持的操作数类型

1 个答案: