DeprecationWarning: find_element_by_* commands are deprecated. Please use find_element() instead

DeprecationWarning: find_element_by_* commands are deprecated. Please use find_element() instead driver.find_element_by_####("###")

弃用警告：find_element_by_* 的一系列命令已经被弃用。请使用 find_element() 代替……

一、解决方式

1、首先需要导入By包

from selenium.webdriver.common.by import By

2、用 find_element() 代替 find_element_by_* [例举部分常用的]

driver = webdriver.Chrome("chromedriver.exe")

# driver.find_element_by_name("NAME")
driver.find_element(By.NAME, "NAME")
# driver.find_element_by_class_name("CLASS_NAME")
driver.find_element(By.CLASS_NAME, "CLASS_NAME")
# driver.find_element_by_id("ID")
driver.find_element(By.ID, "ID")
# driver.find_element_by_xpath("XPATH")
driver.find_element(By.XPATH, "XPATH")

二、分析源码

以 find_element_by_name()为例

1、find_element_by_name() 源码如下：

selenium.webdriver.remote.webdriver.WebDriver.find_element_by_name

def find_element_by_name(self, name) -> WebElement:
    """
    Finds an element by name.

    :Args:
     - name: The name of the element to find.

    :Returns:
     - WebElement - the element if it was found

    :Raises:
     - NoSuchElementException - if the element wasn't found

    :Usage:
        ::

            element = driver.find_element_by_name('foo')
    """
    warnings.warn(
        "find_element_by_* commands are deprecated. Please use find_element() instead",
        DeprecationWarning,
        stacklevel=2,
    )
    return self.find_element(by=By.NAME, value=name)

当进入find_element_by_name()方法，首先会提示弃用警告，最后返回的内容还是调用find_element() 方法，对应传入查找方式By.NAME

2、find_element() 源码如下

selenium.webdriver.remote.webdriver.WebDriver.find_element

    def find_element(self, by=By.ID, value=None) -> WebElement:
        """
        Find an element given a By strategy and locator.

        :Usage:
            ::

                element = driver.find_element(By.ID, 'foo')

        :rtype: WebElement
        """
        if isinstance(by, RelativeBy):
            return self.find_elements(by=by, value=value)[0]

        if by == By.ID:
            by = By.CSS_SELECTOR
            value = '[id="%s"]' % value
        elif by == By.TAG_NAME:
            by = By.CSS_SELECTOR
        elif by == By.CLASS_NAME:
            by = By.CSS_SELECTOR
            value = ".%s" % value
        elif by == By.NAME:
            by = By.CSS_SELECTOR
            value = '[name="%s"]' % value

        return self.execute(Command.FIND_ELEMENT, {
            'using': by,
            'value': value})['value']

isinstance() 函数来判断一个对象是否是一个已知的类型，如果是则返回并跳转到 find_elements() 方法执行， 如果不是则接着进入判断，看by 的内容和哪个匹配，给by和value赋对应的值，最后返回调用execute()执行结果

3、by.py 源码

selenium.webdriver.common.by.By

class By(object):
    """
    Set of supported locator strategies.
    """

    ID = "id"
    XPATH = "xpath"
    LINK_TEXT = "link text"
    PARTIAL_LINK_TEXT = "partial link text"
    NAME = "name"
    TAG_NAME = "tag name"
    CLASS_NAME = "class name"
    CSS_SELECTOR = "css selector"

来源：懒笑翻