如何在Python中将while True更改为while False？

Question

当我试图创建一个旋转的斜杠this时，我想，“我该怎么办?我该怎么办？”关于这段代码。

def stat():
    if True:
        driver.get(webs)
        return False


def spin():
    def spinning_cursor():
        while True:
            for cursor in '|/-\\':
                yield cursor

    spinner = spinning_cursor()
    while stat():
        sys.stdout.write(next(spinner))
        sys.stdout.flush()
        time.sleep(0.1)
        sys.stdout.write('\b')

def catch(xpath=xpaths, image_name=image_names):
    try:
        print('Initializing Chrome: ', end="")
        global driver
        driver = webdriver.Chrome()
        spin()

在函数spin()；while stat()中，我希望它为true，然后当stat()完成时，我希望它返回false，这样spin()将停止，catch()将继续

Answer 1

也许你可以尝试一下这样的方法：

def stat():
    if driver.get(webs):
        return False
    else:
        return True


def spin():
    def spinning_cursor():
        while True:
            for cursor in '|/-\\':
                yield cursor

    spinner = spinning_cursor()
    while stat():
        sys.stdout.write(next(spinner))
        sys.stdout.flush()
        time.sleep(0.1)
        sys.stdout.write('\b')

stat()函数是对Python的if expression evaluation的更显式的求值。

这意味着可以将stat()函数替换为在if表达式中调用driver.get(webs)：

def spin():
    def spinning_cursor():
        while True:
            for cursor in '|/-\\':
                yield cursor

    spinner = spinning_cursor()
    while driver.get(webs):
        sys.stdout.write(next(spinner))
        sys.stdout.flush()
        time.sleep(0.1)
        sys.stdout.write('\b')