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Learn more about Teams text = fp.read() text = re.sub(r'''.*PROPERTIES:.*\n (?:.*\n)* # multiple lines in the middle .*:END: ''',text, flags=re.VERBOSE) fp.seek(0) fp.write(text) fp.close() clearup("01.foreword.org") #+end_src

Run it but report error:

 TypeError: sub() missing 1 required positional argument: ’string’
What's the problem since there are no arguments missing?
                "What's the problem since there are no arguments missing?" - there is an argument missing. Did you read the doc?
– zvone
                Dec 16, 2019 at 1:48
                In other words, "What's the problem since there are no arguments missing?`"—there are arguments missing. Read the documentation for the code you're trying to run before saying there are no arguments missing.
– Chris
                Dec 16, 2019 at 1:33
From python document: https://docs.python.org/3/library/re.html#re.sub
re.sub(pattern, repl, string, count=0, flags=0)
quite a lot of arguments, and together with re.VERBOSE, it is so confusing, and the position of the arguments is error-prone.
So I would suggest separating defining pattern and .sub move in to two lines:
pt = re.compile(pattern, flags = re.VERBOSE)
text = pt.sub(repl, string)
which is more readable in my opinion.
If you're still confused about this or if anyone else comes here to read this. The author of the post was probably trying to call the sub function on the created Regex not on re.
When you do that, you only need to give 2 args to sub
myRegex = re.compile(.... something.....)
myRegex.sub( <regex pattern with which to replace>, <string that has to be subbed>)
        
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