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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 check_pause(self, low):
        '''
        Check to see if this low chunk has been paused
        '''
        if not self.jid:
            # Can't pause on salt-ssh since we can't track continuous state
            return
        pause_path = os.path.join(self.opts['cachedir'], 'state_pause', self.jid)
        start = time.time()
        if os.path.isfile(pause_path):
            try:
                while True:
                    tries = 0
                    with salt.utils.files.fopen(pause_path, 'rb') as fp_:
                        try:
                            pdat = msgpack_deserialize(fp_.read())
                        except msgpack.UnpackValueError:
                            # Reading race condition
                            if tries > 10:
                                # Break out if there are a ton of read errors
                                return
                            tries += 1
                            time.sleep(1)
                            continue
                        id_ = low['__id__']
                        key = ''
                        if id_ in pdat:
                            key = id_
                        elif '__all__' in pdat:
                            key = '__all__'
                        if key:
                            if 'duration' in pdat[key]:
                                now = time.time()
                                if now - start > pdat[key]['duration']:
                                    return 'run'
                            if 'kill' in pdat[key]:
                                return 'kill'
                        else:
                            return 'run'
                        time.sleep(1)
            except Exception as exc:
                log.error('Failed to read in pause data for file located at: %s', pause_path)
                return 'run'
        return 'run'