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I want to write a simple regular expression in Python that extracts a number from HTML. The HTML sample is as follows:
Your number is <b>123</b> Now, how can I extract "123", i.e. the contents of the first bold text after the string "Your number is"?
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One simple way to parse HTML is to use regular expressions to repeatedly search for and extract substrings that match a particular pattern. We can construct a well-formed regular expression to match and extract the link values from the above text as follows: href="http[s]?://.
The regex [0-9] matches single-digit numbers 0 to 9. [1-9][0-9] matches double-digit numbers 10 to 99. That's the easy part. Matching the three-digit numbers is a little more complicated, since we need to exclude numbers 256 through 999.
Basically (0+1)* mathes any sequence of ones and zeroes. So, in your example (0+1)*1(0+1)* should match any sequence that has 1. It would not match 000 , but it would match 010 , 1 , 111 etc. (0+1) means 0 OR 1.
Definition and Usage. The [0-9] expression is used to find any character between the brackets. The digits inside the brackets can be any numbers or span of numbers from 0 to 9. Tip: Use the [^0-9] expression to find any character that is NOT a digit.
import re m = re.search("Your number is <b>(\d+)</b>", "xxx Your number is <b>123</b> fdjsk") if m: print m.groups()[0] If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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