PageWait 如果元素进入判断None为，休眠未重新获取对象，导致一直为None

[kuaidanian]

`class PageWait(object):

def __init__(self, elm, timeout=3):
    """
    wait webelement display
    """
    try:
        timeout_int = int(timeout)
    except TypeError:
        raise ValueError("Type 'timeout' error, must be type int() ")

    for i in range(timeout_int):
        if elm is not None:
            if elm.is_displayed() is True:
                break
            else:
                sleep(1)
        else:
            sleep(1)
    else:
        raise TimeoutError("Timeout, element invisible")`

elm进Pagewait判断的时候如果是个空置，休眠后应该再重新去获取对象

[klookAppTest]

该方法不推荐使用！