Python 3.x 将答案四舍五入到小数点后2位

我有一个函数，可以找到用户在GUI上输入的3个数字的平均值。我需要能够显示小数点后2位的答案。我就是找不到在哪里使用round函数

def average():
        try:
            value1 = int(month1_entry.get())
            value2 = int(month2_entry.get())
            value3 = int(month3_entry.get())
            cases_average.set((value1 + value2 + value3) / 3)
            
        except ValueError:
            messagebox.showerror("Error", "Please Enter a Whole Number")

任何帮助都将不胜感激

谢谢

您可以使用该功能

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相关：这回答了你的问题吗？

average_label = ttk.Label(frame, textvariable = cases_average)
average_label.grid(column = 2, row = 5, sticky = (E))

def average():
        try:
            value1 = int(month1_entry.get())
            value2 = int(month2_entry.get())
            value3 = int(month3_entry.get())
            cases_average.set(round((value1 + value2 + value3) / 3,2)) # I have changed here
            
        except ValueError:
            messagebox.showerror("Error", "Please Enter a Whole Number")