[Python-Dev] Improvements for Pathlib

[Xavier Morel]

On 2014-11-08, at 16:46 , Ionel Cristian Mărieș <contact at ionelmc.ro> wrote:
> Hello,
> 
> In the current incarnation Pathlib is missing some key features I need in my usecases. I want to contribute them but i'd like a bit of feedback on the new api before jumping to implementation.
> 
> The four things I need are:
> 
> #1. A context manager for temporary files and dirs (that cleans everything up on exit). Eg:
> 
> with pathlib.TmpDir(suffix='', prefix='') as tmp:
> assert isinstance(tmp, pathlib.Path)
> 
> with pathlib.TmpFile(suffix='', prefix='') as tmp:
> assert isinstance(tmp, pathlib.Path)
> 

Why would pathlib need to provide this when tempfile already does?

  with tempfile.NamedTemporaryFile(prefix='') as f:
      tmp = pathlib.Path(f.name)

  with tempfile.TemporaryDirectoryDirectory(prefix='') as d:
      tmp = pathlib.Path(d.name)

On 2014-11-08, at 19:14 , Ryan Gonzalez <rymg19 at gmail.com> wrote:
> +1 for the context manager ideas. Anything that is like a resource should be available as a context manager.

The current working directory is not "a resource" though it's a big
piece of global state. I've been bitten by
context-manager-unexpectedly-being-global-state in the past (with
warnings.catch_warnings, I had not noticed the note about
thread-safety). All in all, not a fan.