Python房贷计算器GUI(等额本息，等额本金)
1. 源码
from tkinter import *
class Calculator:
def __init__(self):
window = Tk() # 建立窗口
window.title("房贷计算器") # 命名窗口标题
# 定义StringVar对象动态存储输入框的值
self.amountVar = StringVar() # 贷款金额
self.rateVar = StringVar() # 年化利率
self.yearsVar = StringVar() # 贷款年限
self.monthsVar = StringVar() # 已还期数
self.monthVar = StringVar() # 第i月
self.total_1Var = StringVar() # 等额本息总还款额
self.totalInterest_1Var = StringVar() # 等额本息总利息
self.totalRepayment_1Var = StringVar() # 等额本息累计已还
self.remain_1Var = StringVar() # 等额本息待还金额
self.monthRepayment_1Var = StringVar() # 等额本息第i月应还
self.total_2Var = StringVar() # 等额本金总还款额
self.totalInterest_2Var = StringVar() # 等额本金总利息
self.totalRepayment_2Var = StringVar() # 等额本金累计已还
self.remain_2Var = StringVar() # 等额本金待还金额
self.monthRepayment_2Var = StringVar() # 等额本金第i月应还
# 设置一些默认值
self.monthsVar.set("0")
self.monthVar.set('1')
# 整体面板，设置总体的边距
frame = Frame(window)
frame.pack(padx=20, pady=20)
"""
添加标签
.grid(row, column)设置标签位置
"""
Label(frame, text="贷款金额").grid(row=1, column=1, columnspan=3)
Label(frame, text="年化利率").grid(row=2, column=1, columnspan=3)
Label(frame, text="贷款年限").grid(row=3, column=1, columnspan=3)
Label(frame, text="已还期数").grid(row=4, column=1, columnspan=3)
Label(frame, text="总还款额").grid(row=7, column=1, columnspan=3)
Label(frame, text="总利息额").grid(row=8, column=1, columnspan=3)
Label(frame, text="累计已还").grid(row=9, column=1, columnspan=3)
Label(frame, text="剩余待还").grid(row=10, column=1, columnspan=3)
Label(frame, text="第").grid(row=11, column=1)
Label(frame, text="月应还").grid(row=11, column=3)
"""
添加输入和输出框
textvariable = self.amountVar 由相应的StringVar对象动态保存输入框中的文本
justify=RIGHT 输入框中的文本右对齐
sticky=E 控件在单元格中右对齐
"""
Entry(frame, justify=RIGHT, textvariable=self.amountVar).grid(row=1, column=4)
Entry(frame, justify=RIGHT, textvariable=self.rateVar).grid(row=2, column=4)
Entry(frame, justify=RIGHT, textvariable=self.yearsVar).grid(row=3, column=4)
Entry(frame, justify=RIGHT, textvariable=self.monthsVar).grid(row=4, column=4)
Entry(frame, width=4, justify=CENTER, textvariable=self.monthVar).grid(row=11, column=2)
Label(frame, textvariable=self.total_1Var).grid(row=7, column=4, sticky=E)
Label(frame, textvariable=self.total_2Var).grid(row=7, column=6, sticky=E)
Label(frame, textvariable=self.totalInterest_1Var).grid(row=8, column=4, sticky=E)
Label(frame, textvariable=self.totalInterest_2Var).grid(row=8, column=6, sticky=E)
Label(frame, textvariable=self.totalRepayment_1Var).grid(row=9, column=4, sticky=E)
Label(frame, textvariable=self.totalRepayment_2Var).grid(row=9, column=6, sticky=E)
Label(frame, textvariable=self.remain_1Var).grid(row=10, column=4, sticky=E)
Label(frame, textvariable=self.remain_2Var).grid(row=10, column=6, sticky=E)
Label(frame, textvariable=self.monthRepayment_1Var).grid(row=11, column=4, sticky=E)
Label(frame, textvariable=self.monthRepayment_2Var).grid(row=11, column=6, sticky=E)
# 添加Message存储单位
Message(frame, text="元").grid(row=1, column=5)
Message(frame, text="%").grid(row=2, column=5)
Message(frame, text="年").grid(row=3, column=5)
Message(frame, text="月").grid(row=4, column=5)
Message(frame, text="元").grid(row=7, column=5)
Message(frame, text="元").grid(row=7, column=7)
Message(frame, text="元").grid(row=8, column=5)
Message(frame, text="元").grid(row=8, column=7)
Message(frame, text="元").grid(row=9, column=5)
Message(frame, text="元").grid(row=9, column=7)
Message(frame, text="元").grid(row=10, column=5)
Message(frame, text="元").grid(row=10, column=7)
Message(frame, text="元").grid(row=11, column=5)
Message(frame, text="元").grid(row=11, column=7)
# 空Frame以撑开空间
Frame(frame, height=10).grid(row=5, column=4, columnspan=7)
# 按钮，事件监听函数为calculate
Button(frame, width=19, text="等额本息", command=self.calculate_1).grid(row=6, column=4, columnspan=1, pady=0)
Button(frame, width=19, text="等额本金", command=self.calculate_2).grid(row=6, column=6, columnspan=1, pady=0)
# 消息循环
window.mainloop()
# 按钮点击监听
def calculate_1(self):
"""
等额本息法计算函数
"""
# 获取输入的参数
amount = eval(self.amountVar.get())
rate = eval(self.rateVar.get()) / 100 / 12 # 将年化利率转为月利率，单位为1
years = eval(self.yearsVar.get())
months = eval(self.monthsVar.get())
month = eval(self.monthVar.get())
# 计算每月还款
monthRepayment = amount * rate * ((1 + rate ) ** (years * 12)) / ((1 + rate ) ** (years * 12) - 1)
# 将计算结果设置给控件
total = monthRepayment * 12 * years # 总还款金额
self.total_1Var.set(format(total, ".3f"))
totalInterest = total - amount # 总利息
self.totalInterest_1Var.set(format(totalInterest, '.3f'))
if (months >= 0) and (months <= years * 12): # 已还期数必须在贷款期数内
totalRepayment = monthRepayment * months # 已还金额
remain = total - totalRepayment # 剩余待还金额
self.totalRepayment_1Var.set(format(totalRepayment, '.3f'))
self.remain_1Var.set(format(remain, '.3f'))
else:
self.totalRepayment_1Var.set('已还期数输入有误!')
self.remain_1Var.set('已还期数输入有误!')
if (month >= 1) and (month <= years * 12):
self.monthRepayment_1Var.set(format(monthRepayment, '.3f'))
else:
self.monthRepayment_1Var.set('第_月份输入有误!')
def calculate_2(self):
"""
等额本金法计算函数
"""
# 获取输入的参数
amount = eval(self.amountVar.get())
rate = eval(self.rateVar.get()) / 100 / 12 # 将年化利率转为月利率，单位为1
years = eval(self.yearsVar.get())
months = eval(self.monthsVar.get())
month = eval(self.monthVar.get())
month_amount = amount / (years * 12)
# 存储每月还款
monthRepayment = []
for i in range(1, (years * 12) + 1):
monthpayment = month_amount + (amount - (i - 1) * month_amount) * rate
monthRepayment.append(monthpayment)
# 将计算结果设置给控件
total = sum(monthRepayment)
self.total_2Var.set(format(total, ".3f"))
totalInterest = total - amount
self.totalInterest_2Var.set(format(totalInterest, '.3f'))
if (months >= 0) and (months <= years * 12):
totalRepayment = sum(monthRepayment[:months])
remain = total - totalRepayment
self.totalRepayment_2Var.set(format(totalRepayment, '.3f'))
self.remain_2Var.set(format(remain, '.3f'))
else:
self.totalRepayment_2Var.set('已还期数输入有误!')
self.remain_2Var.set('已还期数输入有误!')
if (month >= 1) and (month <= years * 12):
self.monthRepayment_2Var.set(format(monthRepayment[month - 1], '.3f'))
else:
self.monthRepayment_2Var.set('第_月份输入有误!')
if __name__ == '__main__':
Calculator()
pass
2. 运行结果
88-1房贷计算器
运行上面的代码可以得到上图这样的一个房贷计算器。
房贷计算器GUI
源码来源于网络，如有侵权，联系删除！
今天在网上发现了上面的宝藏代码。