Python:创建新流程 [英] Python : creating a new process

问题描述

我是Python的新手.我应该创建一个具有多个菜单的GUI.单击特定菜单后，应开始一个新过程，并且不应挂起用户界面.但是我无法做到这一点.在进行网络搜索之后，我编写了类似的代码.

I am new to Python . I was supposed to create a GUI with multiple menus . On clicking a particular menu a new process should start and it should not hang the User Interface . But i am not able to achieve that . After web searches I have made a similar kind of code .

在此代码中，我的目标是在不挂起UI的情况下激活深层打印"语句(单击(单击Me即可激活))

In this code my aim is to make the "print deep"statement active without hanging the UI (which gets active after clicking (Click Me ))

在这方面请帮助我.

import Tkinter

class simpleapp_tk(Tkinter.Tk):
    def __init__(self,parent):
        Tkinter.Tk.__init__(self,parent)
        self.parent = parent
        self.initialize()

    def initialize(self):
        self.grid()

        self.entryVariable = Tkinter.StringVar()
        self.entry = Tkinter.Entry(self,textvariable=self.entryVariable)
        self.entry.grid(column=0,row=0,sticky='EW')
        self.entry.bind("<Return>", self.OnPressEnter)
        self.entryVariable.set(u"Enter text here.")

        button = Tkinter.Button(self,text=u"Click me !",
                                command=self.OnButtonClick)
        button.grid(column=1,row=0)

        self.labelVariable = Tkinter.StringVar()
        label = Tkinter.Label(self,textvariable=self.labelVariable,
                              anchor="w",fg="white",bg="blue")
        label.grid(column=0,row=1,columnspan=2,sticky='EW')
        self.labelVariable.set(u"Hello !")

        self.grid_columnconfigure(0,weight=1)
        self.resizable(True,False)
        self.update()
        self.geometry(self.geometry())       
        self.entry.focus_set()
        self.entry.selection_range(0, Tkinter.END)

    def OnButtonClick(self):
        while True:
            print 'deep'
    def OnPressEnter(self,event):
        self.labelVariable.set( self.entryVariable.get()+" (You pressed ENTER)" )
        self.entry.focus_set()
        self.entry.selection_range(0, Tkinter.END)

if __name__ == "__main__":
    app = simpleapp_tk(None)
    app.title('my application')
    app.mainloop()

推荐答案

import threading

class simpleapp_tk(Tkinter.Tk):
    # .............................

    def OnButtonClick(self):
       thr = threading.Thread(target=self.print_deep)
       thr.start()

    def print_deep(self):
       while True:
          print 'deep'

如果要创建新进程，则需要创建单独的脚本，该脚本将在单独的进程中运行. 我仍然认为更好的解决方案是使用线程.

If you want to create a new process you need to create separate script that will run in separate process. I still thing that better solution will be using threads.

proc.py

while True:
    print('deep')

parent_proc.py

parent_proc.py

import subprocess
import sys    

class simpleapp_tk(Tkinter.Tk):
    # .............................

    def OnButtonClick(self):
        subprocess.Popen(args=['python', 'proc.py'], stdout=sys.stdout])

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