与subprocess.check_call返回stdout的内容的等效项是什么？

与subprocess.check_call返回stdout的内容的等效项是什么？ Python 2.7以上

from subprocess import check_output as qx

Python <2.7

从subprocess.py：

import subprocessdef check_output(*popenargs, **kwargs):    if 'stdout' in kwargs:        raise ValueError('stdout argument not allowed, it will be overridden.')    process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)    output, unused_err = process.communicate()    retpre = process.poll()    if retpre:        cmd = kwargs.get("args")        if cmd is None: cmd = popenargs[0]        raise subprocess.CalledProcessError(retpre, cmd, output=output)    return outputclass CalledProcessError(Exception):    def __init__(self, returnpre, cmd, output=None):        self.returnpre = returnpre        self.cmd = cmd        self.output = output    def __str__(self):        return "Command '%s' returned non-zero exit status %d" % ( self.cmd, self.returnpre)# overwrite CalledProcessError due to `output` keyword might be not availablesubprocess.CalledProcessError = CalledProcessError

另请参见将系统命令输出捕获为字符串以获取可能的

check_output()

实现的另一个示例。