You can look into the flock or lockf methods in fcntl module
(or)
the following link will help you
http://www.python.org/doc/2.4/lib/module-fcntl.html
VishnuMohan
Alan Gauld wrote:
"Jeff Peery" <[EMAIL PROTECTED]> wrote
does anyone know if there is a way in python to lock
a file so others cannot open it, or can only read it?
Thats normally controlled by your OS and the rules vary
slightly between them. In general if you open a file for
writing the OS should lock it against writing (and in
some cases against reading too!). So if you want to
lock an existing file while you read and write you could use
a mode string of 'r+'. If you want to create a new locked
file use 'w+''. BUT remember that its up to you to manage
where the cursor is, otherwise you could wind up overwriting
your data.
Another way to protect access, but less reliable, is
to change the file permissions (using os.chmod())
at the start of the operation and change themback at
the end. But that will only protect ahainst access by
other users not against access by other programs that
you might be running! Also you need to have
permission to change permissions in the first place!
HTH,
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