在PyQt4中使用KWallet

Question

如果有人能教我怎么在pyqt4中使用KWallet，那就太好了。

Answer 1

我在这里找到了一个很好的例子，你还需要使用PyKDE4，而不仅仅是PyQt。

Answer 2

在Python命令行中的教程

首先，我将展示如何在Python命令行中使用kwallet来读取和写入密码：

$ python

# We import the necessary modules.
>>> from PyKDE4.kdeui import KWallet
>>> from PyQt4 import QtGui

# We create a QApplication. We will not use it, but otherwise
# we would get a "QEventLoop: Cannot be used without
# QApplication" error message.
>>> app = QtGui.QApplication([])

# We open the wallet.
>>> wallet = KWallet.Wallet.openWallet(
                 KWallet.Wallet.LocalWallet(), 0)

# We create a folder in which we will store our password,
# and set it as current.
>>> wallet.createFolder('myfolder')
True
>>> wallet.hasFolder('myfolder')
True
>>> wallet.setFolder('myfolder')
True

# We read the password (which does not exist yet), write it,
# and read it again.
>>> wallet.readPassword('mykey')
(0, PyQt4.QtCore.QString(u''))
>>> wallet.writePassword('mykey', 'mypassword')
0
>>> wallet.readPassword('mykey')
(0, PyQt4.QtCore.QString(u'mypassword'))

作为Python模块的教程

通常，你会想创建一些简单的函数来封装kwallet的方法。下面这个Python模块可以打开钱包，并获取和设置密码：

#!/usr/bin/python

from PyKDE4.kdeui import KWallet
from PyQt4 import QtGui

def open_wallet():
    app = QtGui.QApplication([])
    wallet = KWallet.Wallet.openWallet(
                 KWallet.Wallet.LocalWallet(), 0)
    if not wallet.hasFolder('kwallet_example'):
        wallet.createFolder('kwallet_example')
    wallet.setFolder('kwallet_example')
    return wallet

def get_password(wallet):
    key, qstr_password = wallet.readPassword('mykey')

    # converting the password from PyQt4.QtCore.QString to str
    return str(qstr_password)

def set_password(wallet, password):
    wallet.writePassword('mykey', password)

它可以这样使用：

$ python
>>> import kwallet_example
>>> wallet = kwallet_example.open_wallet()
>>> kwallet_example.set_password(wallet, 'mypass')
>>> kwallet_example.get_password(wallet)