Function _readline

Lib/test/test_pty.py:66–69

Read one line. May block forever if no newline is read.

(fd)

    return data

def _readline(fd):
    """Read one line.  May block forever if no newline is read."""
    reader = io.FileIO(fd, mode='rb', closefd=False)
    return reader.readline()

def expectedFailureIfStdinIsTTY(fun):
    # avoid isatty()