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pythonhtml-parsing

Validating if a string is a valid HTML in python?

What is the best technique to be used in-order to find out that a string contains a valid html with correct syntax?

I tried looking into HTMLParser from module html.parser and if it doesn't produce any error during parsing, I conclude that the string is a valid HTML . However it didn't help me as it was even parsing invalid strings without raising any errors.

from html.parser import HTMLParser

parser = HTMLParser()

parser.feed('<h1> hi')
parser.close()

I expected it to throw some exception or error since the closing tag is missing but it didn't.

Solution 
  •     from bs4 import BeautifulSoup
    st = """<html>
    ... <head><title>I'm title</title></head>
    ... </html>"""
    st1="who are you"
    bool(BeautifulSoup(st, "html.parser").find())
    True
    bool(BeautifulSoup(st1, "html.parser").find())
    False