_utils.py 文件源码

def _environ_cols_linux(fp):  # pragma: no cover

    # import os
    # if fp is None:
    #     try:
    #         fp = os.open(os.ctermid(), os.O_RDONLY)
    #     except:
    #         pass
    try:
        from termios import TIOCGWINSZ
        from fcntl import ioctl
        from array import array
    except ImportError:
        return None
    else:
        try:
            return array('h', ioctl(fp, TIOCGWINSZ, '\0' * 8))[1]
        except:
            try:
                from os.environ import get
            except ImportError:
                return None
            else:
                return int(get('COLUMNS', 1)) - 1