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18 lis 2013 · You are using a regular expression, and matching HTML with such expressions get too complicated, too fast. Use a HTML parser instead, Python has several to choose from. I recommend you use BeautifulSoup , a popular 3rd party library.
I want to grab the value of a hidden input field in HTML. <input type="hidden" name="fooId" value="12-3456789-1111111111" />. I want to write a regular expression in Python that will return the value of fooId, given that I know the line in the HTML follows the format.
1 dzień temu · Regular expressions (called REs, or regexes, or regex patterns) are essentially a tiny, highly specialized programming language embedded inside Python and made available through the re module.
A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern. RegEx can be used to check if a string contains the specified search pattern.
The (<regex>) metacharacter sequence shown above is the most straightforward way to perform grouping within a regex in Python. The next section introduces you to some enhanced grouping constructs that allow you to tweak when and how grouping occurs.
One simple way to parse HTML is to use regular expressions to repeatedly search for and extract substrings that match a particular pattern. Here is a simple web page: <h1>The First Page</h1> If you like, you can switch to the <a href="http://www.dr-chuck.com/page2.htm"> Second Page</a>. </p>
Parsing HTML using regular expressions ¶. One simple way to parse HTML is to use regular expressions to repeatedly search for and extract substrings that match a particular pattern. Here is a simple web page: <h1>The First Page</h1> <p> If you like, you can switch to the. <a href="http://www.dr-chuck.com/page2.htm"> Second Page</a>. </p>
