How to delete lines from another file using python code?

Question

Python

How to use Python code to find a match and remove from another file?
There are two files, one is running and one is just like a config.
I need to find matches in another file from the running python file and remove this line from it.
Is it possible?

Answer 1

Well, regular expressions can help you.
You loop through the lines of the source file. You check each line against a set of expressions. If there were no matches, put the lines in a temporary file, then move the temporary file to the place of the original one.
More important question - why do you need it? Trying to blacklist functions for untrusted code? So I have bad news, there are quite a few ways to get around this.