missing 1 required positional argument: 'self'。我这实例化有错误吗？

Question

```python
from selenium.webdriver.chrome import webdriver
from selenium.webdriver.firefox import webdriver
from selenium import webdriver


class PageElements:
    """
    浏览器元素
    """

    def __init__(self):
        print("y")

    def chrome_ele(self):
        """
        谷歌
        :return:
        """
        chr_driver = webdriver.Chrome()
        self.user_name = chr_driver.find_element_by_id("kw")
        self.pdw = chr_driver.find_element_by_id('loginpwd')
        self.login_btn = chr_driver.find_element_by_id('loginBtn')

    def ie_ele(self):
        """
        ie
        :return:
        """
        ie_driver = webdriver.Ie()
        self.ie_usen = ie_driver.find_element_by_id("loginUserName")
        self.ie_usepwd = ie_driver.find_element_by_id("loginPwd")
        self.ielogin_btn = ie_driver.find_element_by_id("loginBtn")
        pass

    def firefox_ele(self):
        """
        firefox
        :return:
        """
        fire_driver = webdriver.Firefox()
        self.fire_usen = fire_driver.find_element_by_id("loginUserName")
        self.fire_usepwd = fire_driver.find_element_by_id("loginPwd")
        self.firelogin_btn = fire_driver.find_element_by_id("loginBtn")
        pass

    def edge_ele(self):
        """
        edge
        :return:
        """
        edeg_driver = webdriver.Edge()
        self.edge_usen = edeg_driver.find_element_by_id("loginUserName")
        self.edge_useped = edeg_driver.find_element_by_id("loginPwd")
        self.edgelogin_btn = edeg_driver.find_element_by_id("loginBtn")


chrome_ele = PageElements.chrome_ele()
ie_ele = PageElements.ie_ele()
fire_ele = PageElements.firefox_ele()
edge_ele = PageElements.edge_ele()

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/281354351536190.png "=600 #left")

Answer 1

你好,python类是需要初始化的,你没有执行初始化就开始调用函数出错了,代码做如下修改即可

from selenium.webdriver.chrome import webdriver
from selenium.webdriver.firefox import webdriver
from selenium import webdriver


class PageElements:
    """
    浏览器元素
    """

    def __init__(self):
        print("y")

    def chrome_ele(self):
        """
        谷歌
        :return:
        """
        chr_driver = webdriver.Chrome()
        self.user_name = chr_driver.find_element_by_id("kw")
        self.pdw = chr_driver.find_element_by_id('loginpwd')
        self.login_btn = chr_driver.find_element_by_id('loginBtn')

    def ie_ele(self):
        """
        ie
        :return:
        """
        ie_driver = webdriver.Ie()
        self.ie_usen = ie_driver.find_element_by_id("loginUserName")
        self.ie_usepwd = ie_driver.find_element_by_id("loginPwd")
        self.ielogin_btn = ie_driver.find_element_by_id("loginBtn")
        pass

    def firefox_ele(self):
        """
        firefox
        :return:
        """
        fire_driver = webdriver.Firefox()
        self.fire_usen = fire_driver.find_element_by_id("loginUserName")
        self.fire_usepwd = fire_driver.find_element_by_id("loginPwd")
        self.firelogin_btn = fire_driver.find_element_by_id("loginBtn")
        pass

    def edge_ele(self):
        """
        edge
        :return:
        """
        edeg_driver = webdriver.Edge()
        self.edge_usen = edeg_driver.find_element_by_id("loginUserName")
        self.edge_useped = edeg_driver.find_element_by_id("loginPwd")
        self.edgelogin_btn = edeg_driver.find_element_by_id("loginBtn")

PageElementsobjec=PageElements()
chrome_ele = PageElementsobjec.chrome_ele()
ie_ele = PageElementsobjec.ie_ele()
fire_ele = PageElementsobjec.firefox_ele()
edge_ele = PageElementsobjec.edge_ele()

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