Token Capture Sequences Python Not Working Correctly

I am testing out my python grepper script. It takes multiple search patterns, and works well with regular expressions and plain text. For this test, my input.txt has the following

Solution 1:

You are currently interpreting the command line arguments as regex patterns, without replacing the placeholders %{0} and %{1}. You'll probably want to replace the placeholders with .* or something similar, like so:

class Grepper(object):
    def __init__(self, patterns, debug=False):
        patterns= [re.sub(r'%\{\d\}', '.*', p) for p in patterns]
        self.patterns = [re.compile(p) for p in patterns]