[Python-Dev] Handling of sys.args (Re: User's complaints)

[Guido van Rossum]

Whoa, whoa. What's the *problem* we're trying to solve here?

On 7/14/06, Nick Coghlan <ncoghlan at gmail.com> wrote:
> Greg Ewing wrote:
> > Maybe sys needs to be split into two modules, with
> > the non-sensitive one pre-imported (so that the
> > importless interpreter you suggest wouldn't be
> > unnecessarily crippled).
>
> Maybe not splitting it, but providing a read-only mechanism of getting at
> certain elements, with "import sys" still being the way of *modifying* any of
> these things.
>
> Relatively safe items (could be provided as attributes and methods of a
> read-only class instance in builtins instead of as a module):
>
>    argv (as a tuple instead of a list)
>    byteorder
>    maxint
>    maxunicode
>    builtin_module_names
>    copyright
>    exc_info()
>    exec_prefix
>    executable
>    exit([arg])
>    getdefaultencoding()
>    getfilesystemencoding()
>    getwindowsversion()
>    hexversion
>    platform
>    prefix
>    stdin
>    stdout
>    stderr
>    version
>    version_info
>    winver
>
>
> Arguably privileged information (no real reason for non-privileged code to
> know this stuff):
>    subversion
>    getcheckinterval()
>    getdlopenflags()
>    dllhandle
>    _current_frames()
>    getrefcount(object)
>    getrecursionlimit()
>    _getframe([depth])
>    __displayhook__
>    __excepthook__
>    __stdin__
>    __stdout__
>    __stderr__
>    api_version
>    warnoptions
>    tracebacklimit
>    displayhook(value)
>    excepthook(type, value, traceback)
>    ps1
>    ps2
>
>
> Definitely privileged operations:
>    Actually *setting* any of the above to something different
>    modules
>    path
>    exc_clear()
>    setcheckinterval(interval)
>    setdefaultencoding(name)
>    setdlopenflags(n)
>    setprofile(profilefunc)
>    setrecursionlimit(limit)
>    settrace(tracefunc)
>    settscdump(on_flag)
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
> ---------------------------------------------------------------
>              http://www.boredomandlaziness.org
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)