Python tkinter繪圖對比EXCEL

def pv(r,n,m,f):#劉任昌函數參數r,n,m,f

    p = m/r*(1 - 1/(1+r)**n)+f/(1+r)**n

    return p#執行函數的結果傳回去

n=float(input('期數: '))#要計算轉為實數real nubers

m=float(input('收付: '))#浮點點float

f=float(input('終值: '))

for i in range(1,10):#迴圈

   r = i*0.01

   x=pv(r,n,m,f)

   print('利率 ', r ,'價格 ', x)

import tkinter as tk#輸入tkinter繪圖

root = tk.Tk()

root.title('劉老猴python tkinter')

root.geometry('600x600')#寬度width改成600

canvas = tk.Canvas(root, width=600, height=600)  # 加入 Canvas 畫布

canvas.pack()

x, y = 0, 0

canvas.create_line(0, 400, 500, 400, width=5,fill='purple')

canvas.create_line(5, 0, 5, 400, width=5,fill='purple')

for x in range(1, 400):

    x1 = x+1

    y1 = 400 - pv(x1,n,m,f)*400

    canvas.create_line(x, y, x1, y1, width=5,fill='blue')

    canvas.pack()

    x = x1

    y = y1

root.mainloop()