def response(method):

    if method == "POST":

        return "/post"

    elif method == "GET":

        return "/get"

    elif method == "HEAD":

        return "/head"

    return "/"

def resposne_by_dict(method_dict, method):

    '''用字典代替if 语句   '''

    return method_dict.get(method, "/")

if __name__ == '__main__':

    method_dict = {

        "POST": "/post",

        "GET": "/get",

        "HEAD": "/head",

    }

    method = "POST"

    print(response(method))

    print(resposne_by_dict(method_dict, method))

method_dict = {

            'id':            self.driver.find_element_by_id,

            'name':          self.driver.find_element_by_name,

            'className':     self.driver.find_element_by_class_name,

            'xpath':         self.driver.find_element_by_xpath,

            'link_text':     self.driver.find_element_by_link_text,

            'css_selector':  self.driver.find_element_by_css_selector,

            'names':         self.driver.find_elements_by_name,

            'classNames':    self.driver.find_elements_by_class_name,

            'xpaths':        self.driver.find_elements_by_xpath,

            'css_selectors': self.driver.find_elements_by_css_selector,

        }