我试图创建一个Python tkinter登录注册但遇到一个小问题。
错误消息是:
self.Label_Name = Label(top, text="What is your username: ")
AttributeError: Label instance has no __call__ method
请你能证明我的代码:
from Tkinter import *
class Register:
def __init__(self, parent):
top = self.top = Toplevel(parent)
# Variables to store the entries
self.VarEntUser = StringVar()
self.VarEntPass = StringVar()
self.VarEntRetype = StringVar()
self.Label_Name = Label(top, text="What is your username: ")
self.Label_Password = Label(top, text="Enter a password: ")
self.Label_Retype = Label(top, text="Retype Password: ")
# Entry fields for the user to enter there details
self.Ent_Name = Entry(top, textvariable=self.VarEntUser)
self.Ent_Password = Entry(top, textvariable=self.VarEntPass)
self.Ent_Retype = Entry(top, textvariable=self.VarEntRetype)
# Puts all the fields ^, into the window
self.Label_Name.grid(row=0, sticky=W)
self.Label_Password.grid(row=1, sticky=W)
self.Label_Retype.grid(row=2, sticky=W)
self.Ent_Password.grid(row=1, column=1)
self.Ent_Retype.grid(row=2, column=1)
self.Ent_Name.grid(row=0, column=2)
# Run the RegisterCheck function
# submit button which Checks the Entered details then writes the user and pass to a .txt file
self.MySubmitButton = Button(top, text='Submit', command=RegisterCheck)
self.MySubmitButton.pack()
self.U = raw_input(self.VarEntUser.get())
self.P = raw_input(self.VarEntPass.get())
self.R = raw_input(self.VarEntRetype.get())
class LogIn:
def __init__(self, parent):
top = self.top = Toplevel(parent)
self.a = StringVar()
self.b = StringVar()
self.Label_Log_User1 = Label(top, text='Username:')
self.Label_Log_Pass = Label(top, text='Password: ')
self.Ent_User_Log = Entry(top, textvariable=self.a)
self.Ent_Pass_Log = Entry(top, textvariable=self.b)
self.Label_Log_User1.grid(row=1)
self.Pass_Log.grid(row=2)
self.EntUserLog.grid(row=1, column=1)
self.EntPassLog.grid(row=2, column=1)
self.User = raw_input(self.EntUserLog.get())
self.Pass = raw_input(self.EntUserLog.get())
# runs the 'LoginCheck' function
self.LogInButton = Button(top, text="Log In", command=LogInCheck)
self.LogInButton.pack()
def LogInCheck(self):
# Checks if the fields are blanking displaying an error
if len(self.User) <= 0 and len(self.Pass) <= 0:
print "Please fill in all fields."
else:
pass
# Checks to see if the user and pass have been created
if self.User in 'username.txt' and self.Pass in 'password':
print 'You are now logged in!'
else:
print "Log in Failed"
def RegisterCheck(self):
# Checks if the fields are blank
if len(self.P) <= 0 and len(self.U) <= 0:
print "Please fill out all fields."
else:
pass
# Check is the password and the retype match
if self.P == self.R:
pass
else:
print "Passwords do not match"
# After registering write the user and pass to a .txt file
with open('username.txt', 'a') as fout:
fout.write(self.U + '\n')
with open('password.txt', 'a') as fout:
fout.write(self.P + '\n')
# Depending on what the user chooses, either log in or register than opens the specific window
def launch_Register():
inputDialog = Register(root)
root.wait_window(inputDialog.top)
def launch_LogIn():
inputdialog2 = LogIn(root)
root.wait_window(inputdialog2.top)
root = Tk()
label = Label(root, text='Choose an option')
label.pack()
loginB = Button(root, text='Log In', command=launch_LogIn)
loginB.pack()
registerB = Button(root, text='Register', command=launch_Register)
registerB.pack()
root.mainloop()
答案 0 :(得分:2)
问题在于这一行
Label = Label(root, text='Choose an option')
定义名为Label
的{{1}},从而遮蔽Label
构造函数。然后,在Label
和Register
类中创建几个标签(由这两个按钮触发),名称Login
不再绑定到构造函数,而是绑定到特定标签
更改标签的名称,然后它应该有效。另外,我建议你对变量和方法使用小写名称。仅这一点可能有助于防止许多此类错误。
Label
请注意,您的代码存在一些 许多更多问题:
root = Tk()
label = Label(root, text='Choose an option')
label.pack()
loginB = Button(root, text='Log In', command=launch_LogIn)
loginB.pack()
registerB = Button(root, text='Register', command=launch_Register)
registerB.pack()
root.mainloop()
StringVar
和a
应该是b
和self.a
self.b
在raw_input
窗口小部件中获取用户输入;这是错的!相反,只需读取变量的值即可获得值,例如:而不是Entry
,请使用self.User
self.a.get()
和grid
布局pack
将不检查该名称是否在该文件中if self.User in 'username.txt'
和loginCheck
应该是各自类的方法一旦我在这里,这是我的代码版本(部分),以帮助您入门:
registerCheck
请注意,我将登录“数据库”从文件更改为字典,以简化操作并专注于Tkinter问题。当然,简单字典和纯文本文件都不是存储登录信息的适当方式。
另外,我将GUI小部件的创建和布局放在一行上。在这种情况下,这是可能的,因为我们不需要对这些小部件的引用,但要注意永远不要这样做。 class Register:
def __init__(self, parent):
top = self.top = Toplevel(parent)
self.var_user = StringVar()
self.var_pass = StringVar()
self.var_retype = StringVar()
Label(top, text="What is your username: ").grid(row=0, sticky=W)
Label(top, text="Enter a password: ").grid(row=1, sticky=W)
Label(top, text="Retype Password: ").grid(row=2, sticky=W)
Entry(top, textvariable=self.var_user).grid(row=0, column=1)
Entry(top, textvariable=self.var_pass).grid(row=1, column=1)
Entry(top, textvariable=self.var_retype).grid(row=2, column=1)
Button(top, text='Submit', command=self.registerCheck).grid(row=3)
def registerCheck(self):
u, p, r = self.var_user.get(), self.var_pass.get(), self.var_retype.get()
if p and u:
if p == r:
logins[u] = p
else:
print "Passwords do not match"
else:
print "Please fill out all fields."
class LogIn:
# analogeous to Register; try to figure this out xourself
def launch_Register():
inputDialog = Register(root)
root.wait_window(inputDialog.top)
def launch_LogIn():
inputDialog = LogIn(root)
root.wait_window(inputDialog.top)
logins = {}
root = Tk()
Label(root, text='Choose an option').pack()
Button(root, text='Log In', command=launch_LogIn).pack()
Button(root, text='Register', command=launch_Register).pack()
root.mainloop()
,因为这会将self.label = Label(...).grid(...)
绑定到self.label
的结果,而不会绑定到实际的grid
。
最后,这仍然会将所有消息打印到标准输出。相反,您应该为此添加另一个Label
,或者打开一个消息对话框,但这仍然是读者的练习......