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Easiest way to ask user for password using graphical dialog in Python?

I am developing a backup daemon that will run quietly in the background. The daemon uses backup software duplicity, which requires an encryption key when backing up. I cannot request a password through the console, because, obviously, the daemon does not have access to this.

How can I easily create a prompt that asks the user to enter a password and return it to the application (via a Python variable)? I am using Python 2.7 .

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5 answers
from Tkinter import *

def getpwd():
    password = ''
    root = Tk()
    pwdbox = Entry(root, show = '*')
    def onpwdentry(evt):
         password = pwdbox.get()
         root.destroy()
    def onokclick():
         password = pwdbox.get()
         root.destroy()
    Label(root, text = 'Password').pack(side = 'top')

    pwdbox.pack(side = 'top')
    pwdbox.bind('<Return>', onpwdentry)
    Button(root, command=onokclick, text = 'OK').pack(side = 'top')

    root.mainloop()
    return password
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Because you asked for the simplest (Python 2.7):

import Tkinter, tkSimpleDialog
tkSimpleDialog.askstring("Password", "Enter password:", show='*')

Python 3.3:

import tkinter
tkinter.simpledialog.askstring("Password", "Enter password:", show='*')
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TK, script PyQt:

from PyQt5.QtWidgets import QApplication, QInputDialog, QLineEdit
import sys
app = QApplication(sys.argv)
qd = QInputDialog()
qd.setTextEchoMode(QLineEdit.Password)
qd.show()
app.exec()

, :

#!/bin/env python3
#passwordPrompt.py

from PyQt5.QtWidgets import QApplication, QInputDialog
import sys, time

def succFunc():
  sys.stdout.write(qd.textValue())
  sys.stdout.flush()
  exit(0)

def failFunc():
  exit(1)

app = QApplication(sys.argv)
qd = QInputDialog()
#QLineEdit.Password
qd.setTextEchoMode(2)
qd.rejected.connect(failFunc)
qd.accepted.connect(succFunc)
qd.show()
app.exec()

bash:

#!/bin/bash

passwordPrompt.py | tee
+3

Resolved coverage issues @ pycoder112358 post:

from tkinter import *

PASSWORD = ''

def get_passwd():
    global PASSWORD
    root = Tk()
    pwdbox = Entry(root, show = '*')

    def onpwdentry(evt):
        global PASSWORD 
        PASSWORD = pwdbox.get()
        root.destroy()
    def onokclick():     
        global PASSWORD
        PASSWORD = pwdbox.get()
        root.destroy()

    Label(root, text = 'Password').pack(side = 'top')

    pwdbox.pack(side = 'top')
    pwdbox.bind('<Return>', onpwdentry)
    Button(root, command=onokclick, text = 'OK').pack(side = 'top')

    root.mainloop()
    return PASSWORD
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Extending Diego's answer with minimal care (without this, I got glitches galore, trying to use his very brief example):

import Tkinter, tkSimpleDialog 
root = Tkinter.Tk() # dialog needs a root window, or will create an "ugly" one for you
root.withdraw() # hide the root window
password = tkSimpleDialog.askstring("Password", "Enter password:", show='*', parent=root)
root.destroy() # clean up after yourself!

This will work well with a program that is otherwise just a terminal / console application.

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