What are XPath and CSS Selectors, and how do you use them to locate elements in Python?
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XPath and CSS Selectors are powerful methods used in Selenium (and other web scraping or automation tools) to locate elements within a web page’s HTML structure.
XPath (XML Path Language):
XPath is a query language for selecting nodes from an XML document. In Selenium, it’s used to navigate through elements and attributes.
Types:
-
Absolute XPath: Starts from the root (
/html/body/div[1]/...
) -
Relative XPath: Starts from the middle (
//div[@id='example']
)
CSS Selectors:
CSS Selectors use CSS rules to pinpoint HTML elements. They're generally faster and more readable than XPath.
CSS Selector Features:
-
#id
— select by ID (#login
) -
.class
— select by class (.button
) -
tag[attr='value']
— select by attribute (input[type='text']
)
When to Use Which?
-
Use XPath when you need to navigate complex structures or use advanced queries (like selecting based on text).
-
Use CSS Selectors for speed and simplicity when attributes or classes suffice.
Both methods are essential for dynamic element identification in automation scripts using Selenium with Python.
Read More
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