1

I want to pass some values to a running process, how can I do that ?

say for example I have a worker.py and it has this code.

import os
import sys

def my_test():
    print " I am starting now"
    a = raw_input("Do you want to start ? ")[0].lower()
    if a == "y":
        print "Yes I am starting now"
my_test()

and this file is a executable file. And I have another python file in that file I am using commands to start my worker.py like this.

status, message = commands.getstatusoutput ("/tmp/worker.py")

but command can't go next level because of the raw_input.

Is there anyway I can pass "y" to worker through commands or subprocess ?.

PS : I am running this command through a pyqt gui.

Thanks in advance.

UPDATE :

I found it at last and here is my solution, and yes its using pexpect.

fully working solution of my problem. I hope it will help some in else in future :)

#!/usr/bin/python

import sys
import pexpect
import re
from PyQt4 import QtGui, QtCore


class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Message box')
        qbtn = QtGui.QPushButton('Quit', self)
        qbtn.clicked.connect(self.spawnJob)
        self.qtxte = QtGui.QPlainTextEdit(self)
        qbtn.resize(qbtn.sizeHint())
        qbtn.move(260, 150)
        self.setGeometry(300, 300, 340, 200)
        self.setWindowTitle('Quit button')
        self.show()

    def spawnJob(self):
        self.child = pexpect.spawn ('/usr/local/bin/python /tmp/worker.py')
        a = self.child.expect ('Do you')
        if str(self.child.after) == 'Do you':
            self.test_one()

       before_msg = self.child.before
           self.qtxte.appendPlainText(before_msg)

       for ln in self.child.readlines():
           self.qtxte.appendPlainText(ln.rstrip())

    def test_one(self):

        reply = QtGui.QMessageBox.question(self, 'Message',
            "Are you sure to quit?", QtGui.QMessageBox.Yes |
            QtGui.QMessageBox.No, QtGui.QMessageBox.No)

        if reply == QtGui.QMessageBox.Yes:
            self.child.sendline ('y')
        else:
            self.child.kill(0)

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()
4

1 回答 1

1

彭彭呢？您可以使用它将内容传递给 stdin 上的进程。

或者，您可以尝试类似"yes | /tmp/worker.py"命令。 yes只是将一堆'y'转储到它的标准输出上，然后由worker.py拾取。

更简单的是，"echo y | /tmp/worker.py"用作您的命令。我刚试了一下，对我来说效果很好。

于 2012-06-14T01:21:57.947 回答