正则表达式，不包含字符

Question

I have a pattern that looks like this:

pattern = '.*class=(.*)'

and it gives me the result something like this:

my_class=Hello
your_class=Hi
fclass=FHello
class=That's What I need

Basically I want to say that I need to return a string that contains class only, and not some fclass my_class and so on

Answer 1

If you're running the regex on individual lines, you can use the ^ symbol to target the beginning of a regex:

pattern = r'^class=(.*)'

If not, word boundaries might be helpful:

pattern = r'\bclass=(.*)'