[Patches] [ python-Patches-608182 ] Enhanced file constructor

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Patches item #608182, was opened at 2002-09-11 22:45
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Category: Core (C code)
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Taral (taral)
Assigned to: Nobody/Anonymous (nobody)
Summary: Enhanced file constructor

Initial Comment:
This patch allows the file constructor to take a file
descriptor, allowing for  much easier extension of its
functionality.

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>Comment By: Taral (taral)
Date: 2003-01-31 14:12

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Didn't make it into 2.3alpha?

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Comment By: Taral (taral)
Date: 2002-09-12 13:39

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class some_class(file):
    def __init__(self, arg):
        fd = do_some_os_stuff_with_forks_and_pipes_or_sockets
        return file.__init__(self, fd, 'r')

    def close(self):
        do_some_cleanup_stuff
        return file.close(self)

and so on.

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Comment By: Martin v. Löwis (loewis)
Date: 2002-09-12 01:59

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What's wrong with os.fdopen? Why is

f = file(10, "r")

much easier than

f = os.fdopen(10, "r")

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Comment By: Taral (taral)
Date: 2002-09-12 00:31

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Okay, fixed it all. Passes 'make test' on linux/x86 with
default configure (does not test dbm/gdbm/mpz/bsddb).

(btw, old versions can be deleted)

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Comment By: Neal Norwitz (nnorwitz)
Date: 2002-09-11 23:10

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fp's and fd's are not interchangable.  The variable should
be called fd, since it's an int.  fill_file_fields() 2nd arg
is a FILE*, not an int.  So you would need to do file =
fdopen(fd, mode), then pass file as the 2nd arg.  In order
for this patch to be accepted, a test would also need to be
added (see Lib/test/test_file.py) and doc should be updated
(see Doc/lib/libfuncs.tex).

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Comment By: Taral (taral)
Date: 2002-09-11 22:47

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Bah, forgot the variable.

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