best way to ensure './' is at beginning of sys.path?

[Wildman]

On Fri, 03 Feb 2017 11:06:00 -0500, Neal Becker wrote:

> I want to make sure any modules I build in the current directory overide any 
> others.  To do this, I'd like sys.path to always have './' at the beginning.
> 
> What's the best way to ensure this is always true whenever I run python3?

In python, this method will work but it is only in effect
for the running process that calls it while it is running.
It is not system wide and it is not permanent.

import os
os.environ["PATH"] = os.environ["PATH"] + ":./"
  or
os.environ["PATH"] = "./:" + os.environ["PATH"]

(assuming Linux platform)
To make it permanent for a certain user, add one of
these lines to /home/user/.profile and log out/in:

PATH="$PATH:./"
  or
PATH="./:$PATH"

To make it permanent for all users, add one of
these pairs of lines to /etc/rc.local and reboot:

export PATH=$PATH:./
exit 0
  or
export PATH=./:$PATH
exit 0

Add 'exit 0' only if it doesn't exist already and it
must be the last line.  If /etc/rc.local does not
exist, create it.

-- 
<Wildman> GNU/Linux user #557453
The cow died so I don't need your bull!