Context Managers! I'd like to start with this question. Whether there is a pythonic or non-pythonic way of doing this will probably be the least of your concerns - the hard question will be whether what you are trying to achieve will be possible at all. How to skip directory in use instead of finish process early? To close the file automatically after the task (regardless of whether an exception was raised or not in the try block) you can add the finally block. Once the full code is compiled and executed, it will close the open file if it was opened. Tip: The three letters .txt that follow the dot in names.txt is the "extension" of the file, or its type. So, we will iterate over all the running process and for each process whose name contains the given string, we will keep it's info in a list i.e. You should use the fstat command, you can run it as user : The fstat utility identifies open files. Perhaps you could create a new file if it doesn't exist already. You can simply write open(). then the problem's parameters are changed. This question is about Excel and how it affects file locking. If favouring the "check whether the legacy application has the file open" (intrusive approach prone to race conditions) then you can solve the said race condition by: Updated NOTE on this solution: Checking with FileAccess.ReadWrite will fail for Read-Only files so the solution has been modified to check with FileAccess.Read. If the file is found, the code will return True, otherwise it'll return False. Weapon damage assessment, or What hell have I unleashed? @Ace: Are you talking about Excel? If the code is not indented, it will not be considered part of the context manager. while I vim a file, but it returned False. At a minimum you should pair the two rename operations together. One of the shell commands is probably the most portable way to get that native code, unless you find something on CPAN. open ("demo.txt") We have a line that tries to read it again, right here below: This error is thrown because we are trying to read a closed file. Here is how I did it: just write your log processing code in the except part and you are good to go. Each string represents a line to be added to the file. Familiarity with any Python-supported text editor of your choice. Forrester: Four Digital Intelligence Products of AsiaInfo Included in China Data Governance Ecology Report, Top Notch! The difficult part about this is to avoid reading the entire file into memory in order to measure its size, as this could make the process extremely slow for larger files, this can however be avoided using some file mechanic trickery. En Wed, 07 Mar 2007 02:28:33 -0300, Ros ) first! Interactive coding lessons - all freely available to the author to show them you care and Writable.... 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