这适用于 Python 3.4 版本。我在下面的代码中的内容有效;但是我无法让 DoubleVar() 公式携带 2 位小数格式。当我使用它作为货币时,如何将默认值设置为 0.0 到 0.00。
import tkinter
from tkinter import ttk
root = tkinter.Tk()
root.title("Change Counter")
ttk.Separator(root).grid(row=3, columnspan=5, sticky="ew")
dollarCoins = tkinter.IntVar()
halfDollars = tkinter.IntVar()
quarters = tkinter.IntVar()
dimes = tkinter.IntVar()
nickels = tkinter.IntVar()
pennies = tkinter.IntVar()
dollarCoinsTotal = tkinter.DoubleVar()
halfDollarTotal = tkinter.DoubleVar()
quartersTotal = tkinter.DoubleVar()
dimesTotal = tkinter.DoubleVar()
nickelsTotal = tkinter.DoubleVar()
penniesTotal = tkinter.DoubleVar()
titleLabel = tkinter.Label(root, text = "Change Counter")
titleLabel.grid(row=1, column=1, columnspan = 4)
def Totals():
dollarCoinsTotal.set (float(dollarCoins.get()))
halfDollarTotal.set(float(halfDollars.get()* 0.50))
quartersTotal.set(float(quarters.get()* 0.25))
dimesTotal.set(float(dimes.get()* 0.10))
nickelsTotal.set(float(nickels.get()* 0.05))
penniesTotal.set(float(pennies.get()* 0.01))
titleLabel = tkinter.Label(root, text = "Enter the number of each coin type and hit compute")
titleLabel.grid(row=2, column=1, columnspan =4)
dollarCoinsLabel = tkinter.Label(root, text = "Dollar Coins")
dollarCoinsLabel.grid(row=4, column=1, pady= 5)
dollarCoinsEntry = tkinter.Entry(root, textvariable = dollarCoins)
dollarCoinsEntry.grid(row=4, column=2, pady= 5, padx = 10)
halfDollarsLabel = tkinter.Label(root, text = "Half Dollars")
halfDollarsLabel.grid(row=5, column=1, pady= 5, padx = 10)
halfDollarsEntry = tkinter.Entry(root, textvariable = halfDollars)
halfDollarsEntry.grid(row=5, column=2, pady= 5)
quartersLabel = tkinter.Label(root, text = "Quarters")
quartersLabel.grid(row=6, column=1, pady= 5, padx = 10)
quartersEntry = tkinter.Entry(root, textvariable = quarters)
quartersEntry.grid(row=6, column=2, pady= 5)
dimesLabel = tkinter.Label(root, text = "Dimes")
dimesLabel.grid(row=7, column=1, pady= 5, padx = 10)
dimesEntry = tkinter.Entry(root, textvariable = dimes)
dimesEntry.grid(row=7, column=2, pady= 5)
nickelsLabel = tkinter.Label(root, text = "Nickels")
nickelsLabel.grid(row=8, column=1, pady= 5)
nickelsEntry = tkinter.Entry(root, textvariable = nickels)
nickelsEntry.grid(row=8, column=2, pady= 5, padx = 10)
penniesLabel = tkinter.Label(root, text = "Pennies")
penniesLabel.grid(row=9, column=1, pady= 5, padx = 10)
penniesEntry = tkinter.Entry(root, textvariable = pennies)
penniesEntry.grid(row=9, column=2, pady= 5)
dollarCoinsLabelText = tkinter.Label(root, text = "Dollar Coins Value: $")
dollarCoinsLabelText.grid(row=4, column=3, pady= 5, padx = 10)
dollarCoinsLabelValue = tkinter.Label(root, textvariable = dollarCoinsTotal)
dollarCoinsLabelValue.grid(row=4, column=4, pady= 5)
halfDollarLabelText = tkinter.Label(root, text = "Half Dollar Value: $")
halfDollarLabelText.grid(row=5, column=3, pady= 5, padx = 10)
halfDollarLabelValue = tkinter.Label(root, textvariable = halfDollarTotal)
halfDollarLabelValue.grid(row=5, column=4, pady= 5)
quartersLabelText = tkinter.Label(root, text = "Quarters Value: $")
quartersLabelText.grid(row=6, column=3, pady= 5, padx = 10)
quartersLabelValue = tkinter.Label(root, textvariable = quartersTotal)
quartersLabelValue.grid(row=6, column=4, pady= 5)
dimesLabelText = tkinter.Label(root, text = "Dimes Value: $")
dimesLabelText.grid(row=7, column=3, pady= 5, padx = 10)
dimesLabelValue = tkinter.Label(root, textvariable = dimesTotal)
dimesLabelValue.grid(row=7, column=4, pady= 5)
nickelsLabelText = tkinter.Label(root, text = "Nickels Value: $")
nickelsLabelText.grid(row=8, column=3, pady= 5, padx = 10)
nickelsLabelValue = tkinter.Label(root, textvariable = nickelsTotal)
nickelsLabelValue.grid(row=8, column=4, pady= 5)
penniesLabelText = tkinter.Label(root, text = "Pennies Value: $")
penniesLabelText.grid(row=9, column=3, pady= 5, padx = 10)
penniesLabelValue = tkinter.Label(root, textvariable = penniesTotal)
penniesLabelValue.grid(row=9, column=4, pady= 5)
calculateButton = tkinter.Button(root, text = "Compute", command = Totals)
calculateButton.grid(row=10, column=1)
root.mainloop()
最佳答案
您可以使用.format()
,但是您的变量将转换为字符串
dollars = 99.9 #<== float value
strDollars = '{:.2f}'.format(dollars)
# strDollars = '99.90' <== string value
希望这对您有所帮助!
关于python - Tkinter 格式化为小数点后两位,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34097472/