单一的元素定位方法不能满足所有元素的定位，可以根据每个元素的特点来找到合适的方法，可以参考下图的方法：

elementFind.py

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from common.log import log


class ElementFind(object):
    def __init__(self, driver):
        self.driver = driver

    def find_element(self, locator, timeout=2, internal=0.2):
        """

        :param locator:
        :param timeout:
        :param internal:
        :return:
        """
        for _ in range(2):
            log.info('001:step --> find_element:{ele} time={num}'.format(ele=locator, num=_ + 1))
            try:
                element = WebDriverWait(self.driver, timeout, internal).until(EC.presence_of_element_located(locator))
                return element
            except Exception as e:
                log.warning('[BS]_404:unknown error! %s' % e)
                break

用百度页面搜索做例子，输入框和查询框通过id定位如下：