如何将条目转换为字符串[重复]

Question

所以我正在尝试制作自己的登录页面，但在尝试将用户输入保存到文件时遇到错误。我收到一个错误，告诉我我不能（.write）一个它只能做 str 的条目。如何转换或使条目成为 str？

from tkinter import *


root = Tk()

#if user clicks submit

def reg():
    file = open("login.txt", "a")
    file.write(login)

#display login
myLabel = Label(root, text="login")
myLabel.pack()

#creates a user entry
login = Entry(root, textvariable="login")
login.pack()
#submit buttton
Button(root, text="submit", command=reg).pack()
root.mainloop()

Answer 1

你可以调用 Entry.get() 函数来获取内部字符串

with open("file.txt", "w") as f:
    f.write(login.get())

Answer 2

这里我举个例子：

from tkinter import *


root = Tk()

#if user clicks submit

def reg():
    value=entry.get() # here you get the string
    print(Value)
    file = open("login.txt", "a")
    file.write(Value)
    file.close()

#display login
myLabel = Label(root, text="login")
myLabel.pack()

#creates a user entry
entry = StringVar()
entryv = Entry(root, textvariable=entry)
entryv.grid(row=1, column=1, columnspan=2,rowspan=1)    
#submit buttton
Button(root, text="submit", command=reg).pack()
root.mainloop()

Answer 3

此代码按预期工作。

from tkinter import *

root = Tk()

#if user clicks submit

def reg(var):
    with open("login.txt", "a") as file:
        file.write(var.get())


#display login
myLabel = Label(root, text="login")
myLabel.pack()

#creates a user entry
login_var = StringVar()
entryv = Entry(root, textvariable=login_var).pack()

#submit buttton
Button(root, text="submit", command= lambda: reg(login_var)).pack()
root.mainloop()