如何将循环函数创建的值插入到也使用循环函数自动创建的 tkinter 文本框
How to insert values created by a loop function to tkinter text boxes which are also created automatically with a loop function
您好，我正在尝试编写一个代码来计算分期付款的净现值。代码运行完美，直到我无法将计算值单独插入 tkinter 文本框。
例如，代码询问年利率，输入可以是 15。房子的标价可以是 1000000，首付可以是 0.2，即标价的 %20。而我们可以输入12作为分期付款的次数。
预付款将通过 1000000 乘以 0.2 得出 200000。执行将插入到第一个 tkinter 文本框。但是当对分期付款的净现值进行计算时，它们都出现在最后一个 tkinter 文本框中，而不是单独出现。
这是代码；
# This program is to create a payment schedule for the customers and check whether
# the payment plan is suitable for the seller in terms of net present value.
from tkinter import *
window=Tk()
# This part asks the number of installments and creates the desired amount of text boxes.
def create():
for y in range(number_of_installments.get()):
t11 = Label(window,text= '%s.Installment'%(y+1),foreground="green")
t11.grid(row = y+2,column=0)
for y in range(number_of_installments.get()):
ttt = Text(window, height=1, width=20, foreground="red")
ttt.grid(row = y+2,column=1)
#Net present values of the installments are calculated in this part.
def NPV_calculation():
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number_of_installments.get())+1)]
installment_amount = (float(list_price.get())-(float(list_price.get())*float(downpayment_percentage.get())))/(float(number_of_installments.get()))
calculation = [installment_amount/i for i in interest_rate]
ttt.insert(END,calculation)
downpayment_calculation()
NPV_calculation()
#Downpayment calculated by entering a value between 0 to 1. For example if 0.2 is typed in the textbox it will multiply the list price by %20.
def downpayment_calculation():
Downpayment = float(list_price.get())*float(downpayment_percentage.get())
t0.insert(END,Downpayment)
#Entry boxes
number_of_installments = IntVar(value="")
installment = Entry(window, textvariable=number_of_installments)
installment.grid(row=3,column=3)
interest_value = StringVar()
interest = Entry(window, textvariable=interest_value)
interest.grid(row=0,column=3)
list_price = StringVar()
list = Entry(window, textvariable=list_price)
list.grid(row=1,column=3)
downpayment_percentage = StringVar()
downpayment = Entry(window, textvariable=downpayment_percentage)
downpayment.grid(row=2,column=3)
#Create button for creating number of grids based on the number of installments.
b1 = Button(window, text="Create", command=create)
b1.grid(row=0,column=4)
#Labels for the enrty boxes
n_installments = Label(window,text="Number Of Installments",foreground="blue")
n_installments.grid(row=3,column=2)
yearly_interest = Label(window,text="Yearly Interest",foreground="blue")
yearly_interest.grid(row=0,column=2)
price_list = Label(window,text="List Price",foreground="blue")
price_list.grid(row=1,column=2)
per_downpayment = Label(window,text="Downpayment Percentage",foreground="blue")
per_downpayment.grid(row=2,column=2)
#Label and text box for the downpayment
t0 = Label(window,text="Downpayment",foreground="green")
t0.grid(row=1,column=0)
t0 = Text(window, height=1, width=20, foreground="red")
t0.grid(row=1,column=1)
window.mainloop()
当您调用 NPV_calculation 函数时，ttt 是最后一个文本小部件。
# This part asks the number of installments and creates the desired amount of text boxes.
def create():
for y in range(number_of_installments.get()):
t11 = Label(window,text= '%s.Installment'%(y+1),foreground="green")
t11.grid(row = y+2,column=0)
for y in range(number_of_installments.get()):
ttt = Text(window, height=1, width=20, foreground="red")
ttt.grid(row = y+2,column=1)
print("the object named ttt in this loop iteration is:", ttt)
#Net present values of the installments are calculated in this part.
def NPV_calculation():
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number_of_installments.get())+1)]
installment_amount = (float(list_price.get())-(float(list_price.get())*float(downpayment_percentage.get())))/(float(number_of_installments.get()))
calculation = [installment_amount/i for i in interest_rate]
ttt.insert(END,calculation)
print("the object named ttt is:", ttt)
downpayment_calculation()
NPV_calculation() # <- when you call this function, ttt is the last Text widget
number_of_installments = 3 的输出：
the object named ttt in this loop iteration is: .!text2
the object named ttt in this loop iteration is: .!text3
the object named ttt in this loop iteration is: .!text4
the object named ttt is: .!text4
在循环中创建文本小部件时需要插入值。最好将 NPV_calculation 函数移出循环。
这是自动生成值部分的简化示例。
import tkinter as tk
window = tk.Tk()
def do_n_calculation(n):
calculation = [x+1 for x in range(n)]
return calculation
def create():
# get new values
n = number_of_installments.get()
calculation_list = do_n_calculation(n)
# clear previous values
for i in installment_frame.winfo_children():
i.destroy()
# insert new values
for y in range(n):
t11 = tk.Label(installment_frame, text= '%s.Installment'%(y+1), foreground="green")
t11.grid(row=y, column=0)
for y in range(n):
ttt = tk.Text(installment_frame, height=1, width=20, foreground="red")
ttt.grid(row=y, column=1)
ttt.insert(tk.END, calculation_list[y])
label = tk.Label(window, text="Number Of Installments")
label.grid(row=0, column=0)
number_of_installments = tk.IntVar(value="")
entry = tk.Entry(window, textvariable=number_of_installments)
entry.grid(row=0, column=1)
button = tk.Button(window, text="Create", command=create)
button.grid(row=0, column=2)
installment_frame = tk.Frame(window)
installment_frame.grid(row=1, column=0)
window.mainloop()
使用 class 的完整示例。
import tkinter as tk
class Application(tk.Frame):
"""
| column 0 | column 1 |
-----------------------------------------
row 0 | downpayment_frame | form_frame |
-----------------------------------------
row 1 | installment_frame | |
-----------------------------------------
"""
def __init__(self, master):
super().__init__(master)
# data attributes
self.downpayment_value = None
self.calculation_list = None
# left side
# Label and text box for the downpayment
self.downpayment_frame = tk.Frame(self)
self.downpayment_frame.grid(row=0, column=0, padx=5, pady=5)
self.downpayment_label = tk.Label(self.downpayment_frame, text="Downpayment", foreground="green")
self.downpayment_label.grid(row=0, column=0)
self.downpayment_text = tk.Text(self.downpayment_frame, height=1, width=20, foreground="red")
self.downpayment_text.grid(row=0, column=1)
self.installment_frame = tk.Frame(self)
self.installment_frame.grid(row=1, column=0, padx=5, pady=5)
# right side
self.form_frame = tk.Frame(self)
self.form_frame.grid(row=0, column=1, padx=5, pady=5)
# Labels for the enrty boxes
self.yearly_interest = tk.Label(self.form_frame, text="Yearly Interest", foreground="blue")
self.yearly_interest.grid(row=0, column=0)
self.price_list = tk.Label(self.form_frame, text="List Price", foreground="blue")
self.price_list.grid(row=1, column=0)
self.per_downpayment = tk.Label(self.form_frame, text="Downpayment Percentage", foreground="blue")
self.per_downpayment.grid(row=2, column=0)
self.n_installments = tk.Label(self.form_frame, text="Number Of Installments", foreground="blue")
self.n_installments.grid(row=3, column=0)
# Entry boxes
self.interest_value = tk.StringVar()
self.interest = tk.Entry(self.form_frame, textvariable=self.interest_value)
self.interest.grid(row=0, column=1)
self.list_price = tk.StringVar()
self.price = tk.Entry(self.form_frame, textvariable=self.list_price)
self.price.grid(row=1, column=1)
self.downpayment_percentage = tk.StringVar()
self.downpayment = tk.Entry(self.form_frame, textvariable=self.downpayment_percentage)
self.downpayment.grid(row=2, column=1)
self.number_of_installments = tk.IntVar(value="")
self.installment = tk.Entry(self.form_frame, textvariable=self.number_of_installments)
self.installment.grid(row=3, column=1)
# Create button for creating number of grids based on the number of installments.
self.create_button = tk.Button(self.form_frame, text="Create", command=self.create)
self.create_button.grid(row=0, column=2, rowspan=4, padx=[5, 0])
# Net present values of the installments are calculated in this part.
def NPV_calculation(self, number, list_price, percentage):
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number)+1)]
installment_amount = (float(list_price)-(float(list_price)*float(percentage)))/(float(number))
calculation = [installment_amount/i for i in interest_rate]
return calculation
def downpayment_calculation(self, list_price, percentage):
downpayment = float(list_price)*float(percentage)
return downpayment
def create(self):
number = self.number_of_installments.get()
list_price = self.list_price.get()
percentage = self.downpayment_percentage.get()
# get new values and set data attributes
self.downpayment_value = self.downpayment_calculation(list_price, percentage)
self.calculation_list = self.NPV_calculation(number, list_price, percentage)
# clear previous values
self.downpayment_text.delete("1.0", tk.END)
for i in self.installment_frame.winfo_children():
i.destroy()
# insert new values
self.downpayment_text.insert(tk.END, self.downpayment_value)
for y in range(number):
label = tk.Label(self.installment_frame,text= '%s.Installment'%(y+1), foreground="green")
label.grid(row=y, column=0)
for y in range(number):
text = tk.Text(self.installment_frame, height=1, width=20, foreground="red")
text.grid(row=y, column=1)
text.insert(tk.END, self.calculation_list[y])
self.get_calculation()
def get_calculation(self):
print(self.downpayment_value)
print(self.calculation_list)
root = tk.Tk()
app = Application(master=root)
app.pack()
app.mainloop()
您好，我正在尝试编写一个代码来计算分期付款的净现值。代码运行完美，直到我无法将计算值单独插入 tkinter 文本框。
例如，代码询问年利率，输入可以是 15。房子的标价可以是 1000000，首付可以是 0.2，即标价的 %20。而我们可以输入12作为分期付款的次数。
预付款将通过 1000000 乘以 0.2 得出 200000。执行将插入到第一个 tkinter 文本框。但是当对分期付款的净现值进行计算时，它们都出现在最后一个 tkinter 文本框中，而不是单独出现。
这是代码；
# This program is to create a payment schedule for the customers and check whether
# the payment plan is suitable for the seller in terms of net present value.
from tkinter import *
window=Tk()
# This part asks the number of installments and creates the desired amount of text boxes.
def create():
for y in range(number_of_installments.get()):
t11 = Label(window,text= '%s.Installment'%(y+1),foreground="green")
t11.grid(row = y+2,column=0)
for y in range(number_of_installments.get()):
ttt = Text(window, height=1, width=20, foreground="red")
ttt.grid(row = y+2,column=1)
#Net present values of the installments are calculated in this part.
def NPV_calculation():
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number_of_installments.get())+1)]
installment_amount = (float(list_price.get())-(float(list_price.get())*float(downpayment_percentage.get())))/(float(number_of_installments.get()))
calculation = [installment_amount/i for i in interest_rate]
ttt.insert(END,calculation)
downpayment_calculation()
NPV_calculation()
#Downpayment calculated by entering a value between 0 to 1. For example if 0.2 is typed in the textbox it will multiply the list price by %20.
def downpayment_calculation():
Downpayment = float(list_price.get())*float(downpayment_percentage.get())
t0.insert(END,Downpayment)
#Entry boxes
number_of_installments = IntVar(value="")
installment = Entry(window, textvariable=number_of_installments)
installment.grid(row=3,column=3)
interest_value = StringVar()
interest = Entry(window, textvariable=interest_value)
interest.grid(row=0,column=3)
list_price = StringVar()
list = Entry(window, textvariable=list_price)
list.grid(row=1,column=3)
downpayment_percentage = StringVar()
downpayment = Entry(window, textvariable=downpayment_percentage)
downpayment.grid(row=2,column=3)
#Create button for creating number of grids based on the number of installments.
b1 = Button(window, text="Create", command=create)
b1.grid(row=0,column=4)
#Labels for the enrty boxes
n_installments = Label(window,text="Number Of Installments",foreground="blue")
n_installments.grid(row=3,column=2)
yearly_interest = Label(window,text="Yearly Interest",foreground="blue")
yearly_interest.grid(row=0,column=2)
price_list = Label(window,text="List Price",foreground="blue")
price_list.grid(row=1,column=2)
per_downpayment = Label(window,text="Downpayment Percentage",foreground="blue")
per_downpayment.grid(row=2,column=2)
#Label and text box for the downpayment
t0 = Label(window,text="Downpayment",foreground="green")
t0.grid(row=1,column=0)
t0 = Text(window, height=1, width=20, foreground="red")
t0.grid(row=1,column=1)
window.mainloop()
当您调用 NPV_calculation 函数时，ttt 是最后一个文本小部件。
# This part asks the number of installments and creates the desired amount of text boxes.
def create():
for y in range(number_of_installments.get()):
t11 = Label(window,text= '%s.Installment'%(y+1),foreground="green")
t11.grid(row = y+2,column=0)
for y in range(number_of_installments.get()):
ttt = Text(window, height=1, width=20, foreground="red")
ttt.grid(row = y+2,column=1)
print("the object named ttt in this loop iteration is:", ttt)
#Net present values of the installments are calculated in this part.
def NPV_calculation():
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number_of_installments.get())+1)]
installment_amount = (float(list_price.get())-(float(list_price.get())*float(downpayment_percentage.get())))/(float(number_of_installments.get()))
calculation = [installment_amount/i for i in interest_rate]
ttt.insert(END,calculation)
print("the object named ttt is:", ttt)
downpayment_calculation()
NPV_calculation() # <- when you call this function, ttt is the last Text widget
number_of_installments = 3 的输出：
the object named ttt in this loop iteration is: .!text2
the object named ttt in this loop iteration is: .!text3
the object named ttt in this loop iteration is: .!text4
the object named ttt is: .!text4
在循环中创建文本小部件时需要插入值。最好将 NPV_calculation 函数移出循环。
这是自动生成值部分的简化示例。
import tkinter as tk
window = tk.Tk()
def do_n_calculation(n):
calculation = [x+1 for x in range(n)]
return calculation
def create():
# get new values
n = number_of_installments.get()
calculation_list = do_n_calculation(n)
# clear previous values
for i in installment_frame.winfo_children():
i.destroy()
# insert new values
for y in range(n):
t11 = tk.Label(installment_frame, text= '%s.Installment'%(y+1), foreground="green")
t11.grid(row=y, column=0)
for y in range(n):
ttt = tk.Text(installment_frame, height=1, width=20, foreground="red")
ttt.grid(row=y, column=1)
ttt.insert(tk.END, calculation_list[y])
label = tk.Label(window, text="Number Of Installments")
label.grid(row=0, column=0)
number_of_installments = tk.IntVar(value="")
entry = tk.Entry(window, textvariable=number_of_installments)
entry.grid(row=0, column=1)
button = tk.Button(window, text="Create", command=create)
button.grid(row=0, column=2)
installment_frame = tk.Frame(window)
installment_frame.grid(row=1, column=0)
window.mainloop()
使用 class 的完整示例。
import tkinter as tk
class Application(tk.Frame):
"""
| column 0 | column 1 |
-----------------------------------------
row 0 | downpayment_frame | form_frame |
-----------------------------------------
row 1 | installment_frame | |
-----------------------------------------
"""
def __init__(self, master):
super().__init__(master)
# data attributes
self.downpayment_value = None
self.calculation_list = None
# left side
# Label and text box for the downpayment
self.downpayment_frame = tk.Frame(self)
self.downpayment_frame.grid(row=0, column=0, padx=5, pady=5)
self.downpayment_label = tk.Label(self.downpayment_frame, text="Downpayment", foreground="green")
self.downpayment_label.grid(row=0, column=0)
self.downpayment_text = tk.Text(self.downpayment_frame, height=1, width=20, foreground="red")
self.downpayment_text.grid(row=0, column=1)
self.installment_frame = tk.Frame(self)
self.installment_frame.grid(row=1, column=0, padx=5, pady=5)
# right side
self.form_frame = tk.Frame(self)
self.form_frame.grid(row=0, column=1, padx=5, pady=5)
# Labels for the enrty boxes
self.yearly_interest = tk.Label(self.form_frame, text="Yearly Interest", foreground="blue")
self.yearly_interest.grid(row=0, column=0)
self.price_list = tk.Label(self.form_frame, text="List Price", foreground="blue")
self.price_list.grid(row=1, column=0)
self.per_downpayment = tk.Label(self.form_frame, text="Downpayment Percentage", foreground="blue")
self.per_downpayment.grid(row=2, column=0)
self.n_installments = tk.Label(self.form_frame, text="Number Of Installments", foreground="blue")
self.n_installments.grid(row=3, column=0)
# Entry boxes
self.interest_value = tk.StringVar()
self.interest = tk.Entry(self.form_frame, textvariable=self.interest_value)
self.interest.grid(row=0, column=1)
self.list_price = tk.StringVar()
self.price = tk.Entry(self.form_frame, textvariable=self.list_price)
self.price.grid(row=1, column=1)
self.downpayment_percentage = tk.StringVar()
self.downpayment = tk.Entry(self.form_frame, textvariable=self.downpayment_percentage)
self.downpayment.grid(row=2, column=1)
self.number_of_installments = tk.IntVar(value="")
self.installment = tk.Entry(self.form_frame, textvariable=self.number_of_installments)
self.installment.grid(row=3, column=1)
# Create button for creating number of grids based on the number of installments.
self.create_button = tk.Button(self.form_frame, text="Create", command=self.create)
self.create_button.grid(row=0, column=2, rowspan=4, padx=[5, 0])
# Net present values of the installments are calculated in this part.
def NPV_calculation(self, number, list_price, percentage):
interest_rate = [pow(1+0.0125,i) for i in range(1,int(number)+1)]
installment_amount = (float(list_price)-(float(list_price)*float(percentage)))/(float(number))
calculation = [installment_amount/i for i in interest_rate]
return calculation
def downpayment_calculation(self, list_price, percentage):
downpayment = float(list_price)*float(percentage)
return downpayment
def create(self):
number = self.number_of_installments.get()
list_price = self.list_price.get()
percentage = self.downpayment_percentage.get()
# get new values and set data attributes
self.downpayment_value = self.downpayment_calculation(list_price, percentage)
self.calculation_list = self.NPV_calculation(number, list_price, percentage)
# clear previous values
self.downpayment_text.delete("1.0", tk.END)
for i in self.installment_frame.winfo_children():
i.destroy()
# insert new values
self.downpayment_text.insert(tk.END, self.downpayment_value)
for y in range(number):
label = tk.Label(self.installment_frame,text= '%s.Installment'%(y+1), foreground="green")
label.grid(row=y, column=0)
for y in range(number):
text = tk.Text(self.installment_frame, height=1, width=20, foreground="red")
text.grid(row=y, column=1)
text.insert(tk.END, self.calculation_list[y])
self.get_calculation()
def get_calculation(self):
print(self.downpayment_value)
print(self.calculation_list)
root = tk.Tk()
app = Application(master=root)
app.pack()
app.mainloop()