Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #102932

Re: Make a unique filesystem path, without creating the file

Show all headers | View raw

Dan Sommers <dan@tombstonezero.net> writes:

> On Mon, 15 Feb 2016 11:08:52 +1100, Ben Finney wrote:
>
> > I am unconcerned with whether there is a real filesystem entry of
> > that name; the goal entails having no filesystem activity for this.
> > I want a valid unique filesystem path, without touching the
> > filesystem.
>
> That's an odd use case.

It's very common to want filesystem paths divorced from accessing a
filesystem entry.

For example: test paths in a unit test. Filesystem access is orders of
magnitude slower than accessing fake files in memory only, it is more
complex and prone to irrelevant failures. So in such a test case
filesystem access should be avoided as unnecessary.

> If it's really just one valid filesystem path (your original post said
> *paths*, plural), then how about __file__? or os.__file__?

One valid filesystem path each time it's accessed. That is, behaviour
equivalent to ‘tempfile.mktemp’.

My question is because the standard library clearly has this useful
functionality implemented, but simultaneously warns strongly against its
use.

I'm looking for how to get at that functionality in a non-deprecated
way, without re-implementing it myself.

-- 
 \      “The most common way people give up their power is by thinking |
  `\                               they don't have any.” —Alice Walker |
_o__)                                                                  |
Ben Finney

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: Make a unique filesystem path, without creating the file Ben Finney <ben+python@benfinney.id.au> - 2016-02-15 11:08 +1100
  Re: Make a unique filesystem path, without creating the file Dan Sommers <dan@tombstonezero.net> - 2016-02-15 01:07 +0000
    Re: Make a unique filesystem path, without creating the file Ben Finney <ben+python@benfinney.id.au> - 2016-02-15 12:19 +1100
      Re: Make a unique filesystem path, without creating the file Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-02-15 15:54 +1100
        Re: Make a unique filesystem path, without creating the file Ben Finney <ben+python@benfinney.id.au> - 2016-02-15 16:25 +1100
        Re: Make a unique filesystem path, without creating the file Rick Johnson <rantingrickjohnson@gmail.com> - 2016-02-15 18:26 -0800
      Re: Make a unique filesystem path, without creating the file Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-02-15 21:00 +1300
        Re: Make a unique filesystem path, without creating the file Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-16 01:18 +0100
      Re: Make a unique filesystem path, without creating the file Grant Edwards <invalid@invalid.invalid> - 2016-02-15 15:49 +0000
  Re: Make a unique filesystem path, without creating the file Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-02-15 15:06 +1100
    Re: Make a unique filesystem path, without creating the file Ben Finney <ben+python@benfinney.id.au> - 2016-02-15 15:28 +1100
      Re: Make a unique filesystem path, without creating the file Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-02-15 21:11 +1300
      Re: Make a unique filesystem path, without creating the file Nobody <nobody@nowhere.invalid> - 2016-02-16 02:14 +0000
    Re: Make a unique filesystem path, without creating the file "Martin A. Brown" <martin@linux-ip.net> - 2016-02-14 20:48 -0800

csiph-web