有没有办法将 tkinter 中的条目文本框转换为变量

Question

我试图打印 x、y、z 和 w，然后在输入小部件中按一个按钮为它们分配一个数字，所以一旦我按下按钮 x、y、z 和 w 就会打印

Curve1_lb = Label(canvas,text='Curve 1')
Curve1 = Entry(canvas)

Curve2_lb = Label(canvas,text='Curve 2')
Curve2 = Entry(canvas)

Curve3_lb = Label(canvas,text='Curve 3')
Curve3 = Entry(canvas)

Curve4_lb = Label(canvas, text='Curve 4')
Curve4 = Entry(canvas)

Curve1.pack()  
Curve2.pack() 
Curve3.pack()
Curve4.pack()
Curve1_lb.pack()
Curve2_lb.pack()
Curve3_lb.pack() 
Curve4_lb.pack() 

x = Curve1
y = Curve2
z = Curve3 
w = Curve4   

btn = Button(canvas,text='Print',relief=SOLID, command = prints)
btn.pack(pady=10)
                                                                                   
def prints():
    print(x)
    print(y)
    print(z)
    print(w)

Answer 1

在您的代码中，x 只是对Curve1 小部件的另一个引用。要获取小部件的内容，您必须调用get：

from tkinter import *

canvas = Tk()

Curve1_lb = Label(canvas,text='Curve 1')
Curve1 = Entry(canvas)

Curve2_lb = Label(canvas,text='Curve 2')
Curve2 = Entry(canvas)

Curve3_lb = Label(canvas,text='Curve 3')
Curve3 = Entry(canvas)

Curve4_lb = Label(canvas, text='Curve 4')
Curve4 = Entry(canvas)

Curve1_lb.pack()
Curve1.pack()
Curve2_lb.pack()
Curve2.pack()
Curve3_lb.pack()
Curve3.pack()
Curve4_lb.pack()
Curve4.pack()

def prints():
    print(Curve1.get())
    print(Curve2.get())
    print(Curve3.get())
    print(Curve4.get())

btn = Button(canvas,text='Print',relief=SOLID, command = prints)
btn.pack(pady=10)

canvas.mainloop()

还可以在小部件和局部变量之间创建“实时”连接，但这在这里并不是必需的。

Answer 2

尝试使用 x 作为

x = Curve1.get("1.0","end") #this will get all the text in the entry widget
print(x)

Answer 3

我不会说这是更好的方法，而是替代方法。它有点冗长，但请尝试一次，它可以替代您的代码。

from tkinter import *

canvas = Tk()

c1=StringVar()
c2=StringVar()
c3=StringVar()
c4=StringVar()

Curve1_lb = Label(canvas,text='Curve 1')
Curve1 = Entry(canvas,textvariable=c1)
Curve1_lb.pack()
Curve1.pack()

Curve2_lb = Label(canvas,text='Curve 2')
Curve2 = Entry(canvas,textvariable=c2)
Curve2_lb.pack()
Curve2.pack()

Curve3_lb = Label(canvas,text='Curve 3')
Curve3 = Entry(canvas,textvariable=c3)
Curve3_lb.pack()
Curve3.pack()

Curve4_lb = Label(canvas, text='Curve 4')
Curve4 = Entry(canvas,textvariable=c4)
Curve4_lb.pack()
Curve4.pack()

def prints():
    print(c1.get())
    print(c2.get())
    print(c3.get())
    print(c4.get())

btn = Button(canvas,text='Print',relief=SOLID, command = prints)
btn.pack(pady=10)

canvas.mainloop()

我们正在为每个条目创建新变量并将其分别保存在c1、c2、c3、c4。