为什么找不到这个元素，用的是selenium

Question

Promises = self.driver.find_element_by_class_name('tb-serPromise')
# Promises = driver.find_element_by_xpath('//ul[@class="tb-serPromise"]')

这两个都不行，提示selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: .tb-serPromise

明明有这个class

Answer 1

等待一秒就好了

Answer 2

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