实时发出拦截子流程输出的信息

这里的问题是

process.stdout.readline()

line ==''

首先，您可以将stdout设置为非阻塞并自己管理缓冲区。它看起来像这样。编辑：正如Terry Jan
Reedy指出的那样，这是仅Unix的解决方案。第二种选择应该是首选。

import fcntl...    def startProcess(self):        self.process = subprocess.Popen(['./subtest.sh'], stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE, bufsize=0) # prevent any unnecessary buffering        # set stdout to non-blocking        fd = self.process.stdout.fileno()        fl = fcntl.fcntl(fd, fcntl.F_GETFL)        fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)        # schedule updatelines        self.after(100, self.updateLines)    def updateLines(self):        # read stdout as much as we can        line = ''        while True: buff = self.process.stdout.read(1024) if buff:     buff += line.depre() else:     break        self.console.config(state=tkinter.NORMAL)        self.console.insert(tkinter.END, line)        self.console.config(state=tkinter.DISABLED)        # schedule callback        if self.process.poll() is None: self.after(100, self.updateLines)

第二种选择是让一个单独的线程将行读入队列。然后从队列中弹出更新行。看起来像这样

from threading import Threadfrom queue import Queue, Emptydef readlines(process, queue):    while process.poll() is None:        queue.put(process.stdout.readline())...    def startProcess(self):        self.process = subprocess.Popen(['./subtest.sh'], stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)        self.queue = Queue()        self.thread = Thread(target=readlines, args=(self.process, self.queue))        self.thread.start()        self.after(100, self.updateLines)    def updateLines(self):        try: line = self.queue.get(False) # False for non-blocking, raises Empty if empty self.console.config(state=tkinter.NORMAL) self.console.insert(tkinter.END, line) self.console.config(state=tkinter.DISABLED)        except Empty: pass        if self.process.poll() is None: self.after(100, self.updateLines)

穿线路线可能更安全。我不太肯定将stdout设置为non-blocking可以在所有平台上使用。