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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def execute(paramPath, executable='pParse.exe'):
 """Execute pParse with the specified parameter file. :param paramPath: location of the pParse parameter file :param executable: must specify the complete file path of the pParse.exe if its location is not in the ``PATH`` environment variable. :returns: :func:`subprocess.Popen` return code, 0 if pParse was executed successful """

    procArgs = [executable, paramPath]

    ## run it ##
    proc = subprocess.Popen(procArgs, stderr=subprocess.PIPE)

    ## But do not wait till netstat finish, start displaying output immediately ##
    while True:
        out = proc.stderr.read(1)
        if out == '' and proc.poll() != None:
            break
        if out != '':
            sys.stdout.write(out)
            sys.stdout.flush()

    return proc.returncode