Question

基本上我想要做的是将命令行可执行文件（如coursera-dl）生成的输出放到文本控件中。但它（命令行可执行文件）使用logging.info打印输出，似乎子进程无法读取logging.info打印输出但是当logging.info函数更改为print时，wxpython能够读取输出cmd到textctrl。我用python27。我的代码来自网络上的一堆代码：

self.courses_list = ""
def execute(self,command,textctrl):
        #clear the textctrl
        #try:
        textctrl.SetValue("")
        si=subprocess.STARTUPINFO()
        si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
        process = subprocess.Popen(command,stdout=subprocess.PIPE,**self.subprocess_args(False))
        output = ''
        self.out=[]
   # Poll process for new output until finished
    for line in iter(process.stdout.readline, ""):
        textctrl.AppendText(line)
        output += line#.strip().decode('utf-8')
        self.courses_list+=line
        print(line)
        self.out.append(line)

    process.wait()
    exitCode = process.returncode

    if (exitCode == 0):
        return output
    else:
        raise Exception(command, exitCode, output)

def subprocess_args(self,include_stdout=True):
    if hasattr(subprocess, 'STARTUPINFO'):
        si=subprocess.STARTUPINFO()
        si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
        env = os.environ
    else:
        si=None
        env=None

    if include_stdout:
        ret={'stdout:':subprocess.PIPE}
    else:
        ret={}

    ret.update({'stdin':subprocess.PIPE,
                'stderr':subprocess.PIPE,
                'startupinfo':si,
                'env':env})
    return ret

Answer 1

它似乎与读取stderr的输出有关。所以将'stderr'：subprocess.PIPE更改为'stderr'：subprocess.STDOUT解决了这个问题。所以这里是ret部分的变化如何

    ret.update({'stdin':subprocess.PIPE,
            'stderr':subprocess.STDOUT,#here's the solution
            'startupinfo':si,
            'env':env})

在wxpython文本控件中打印logging.info生成的输出

1 个答案: