yandextank/common/util.py
def read_with_lock(self, pos, _len=None):
        """
        Reads {_len} characters if _len is not None else reads line
        :param pos: start reading position
        :param _len: number of characters to read
        :rtype: (string, int)
        """
        self.wait_lock()
        try:
            self._opened_file.seek(pos)
            result = self._opened_file.read(_len) if _len is not None else self._opened_file.readline()
            stop_pos = self._opened_file.tell()
        finally:
            self.unlock()
        if not result and self.stop.is_set():
            result = None
        return result, stop_pos
def read_with_lock(self, pos, _len=None):
        """
        Reads {_len} characters if _len is not None else reads line
        :param pos: start reading position
        :param _len: number of characters to read
        :rtype: (string, int)
        """
        self.wait_lock()
        try:
            self._opened_file.seek(pos)
            result = self._opened_file.read(_len) if _len is not None else self._opened_file.readline()
            stop_pos = self._opened_file.tell()
        finally:
            self.unlock()
        if not result and self.stop.is_set():
            result = None
        return result, stop_pos
Reads {_len} characters if _len is not None else reads line
        :param pos: start reading position
        :param _len: number of characters to read
        :rtype: (string, int)