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+--- Thread: How to define a global file? (/thread-298.html)
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How to define a global file? - dullboy - Oct-05-2016
I need to set up a file as a log file in my python program. So basically I need to create a global file. I am just wondering what is the best way to define a global file in python? Thanks.
RE: How to define a global file? - wavic - Oct-05-2016
I don't get you what you mean with the fraze 'a global file'. With Python you can read and write any file as long as you have permissions to do that.
RE: How to define a global file? - Larz60+ - Oct-05-2016
Logging is a fairly complex subject. Where you declare the file, and open it is very much dependent on how your code is structured.
the easiest thing to do is go to https://pypi.python.org/ and query 'logging' find a suitable module, install it and just import
into your code.
RE: How to define a global file? - dullboy - Oct-05-2016
Actually, all I want is to trace the program execution and list the functions executed during the program run. Should I simply use trace module? Thanks.
RE: How to define a global file? - Skaperen - Oct-05-2016
in some cases i cheat to do logging. i open() or os.open() a file and os.dup2() its file descriptor to stdout (1). i am running Linux. i have no idea if this works in Windows (nor do i care). then all print() goes to that file, even in called functions and forked processes (which i do a lot of).
RE: How to define a global file? - wavic - Oct-05-2016
I am running linux too. @scaperen, you say that all output from a program can be wrote in a file? Which os. method is doing that?
RE: How to define a global file? - j.crater - Oct-05-2016
I once wanted to output data from top to a file, so I used this
top -n 10 -b > top-output.txt
to run the process.
RE: How to define a global file? - wavic - Oct-05-2016
Output redirection is one thing I know well but I was asking how to do it from Python script. I will look at os module later to see what is provided.
RE: How to define a global file? - j.crater - Oct-05-2016
Oh sorry then wavic, I didn't catch that bit. I will be glad to hear what you found out if you will look into it.
RE: How to define a global file? - wavic - Oct-05-2016
Actually that is crossed my mind after @scaperen's post. Post #5