[Python-Dev] PEP 549: Instance Properties (aka: module properties)

[Chris Barker]

On Thu, Sep 7, 2017 at 3:49 PM, Larry Hastings <larry at hastings.org> wrote:

>  But I can cite at least one place in the standard library that would have
> been better if it'd been implemented as a module property:
>
os.stat_float_times().
>
I wish there were a property feature available almost very time I encounter
a "get*" method in the stdlib (or any where):

There are a heck of a lot in the os module:


In [4]: [s for s in dir(os) if s.startswith('get')]
Out[4]:

['get_blocking',
 'get_exec_path',
 'get_inheritable',
 'get_terminal_size',
 'getcwd',
 'getcwdb',
 'getegid',
 'getenv',
 'getenvb',
 'geteuid',
 'getgid',
 'getgrouplist',
 'getgroups',
 'getloadavg',
 'getlogin',
 'getpgid',
 'getpgrp',
 'getpid',
 'getppid',
 'getpriority',
 'getsid',
 'getuid']

Many of those may be good use-cases for getters, but still...

And just yesterday I was getting annoyed by some in sysconfig:

In [6]: [s for s in dir(sysconfig)  if s.startswith('get')]
Out[6]:

['get_config_h_filename',
 'get_config_var',
 'get_config_vars',
 'get_makefile_filename',
 'get_path',
 'get_path_names',
 'get_paths',
 'get_platform',
 'get_python_version',
 'get_scheme_names']


modules serve the very useful function of a global singleton -- if we think
properties are a good idea for classes, then they are a good idea for
modules...

-CHB


-- 

Christopher Barker, Ph.D.
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