[Tutor] Percentage of installations without setuptools (Was if __name__=='__main__' ...)

[Thomas Güttler]

I start a new thread, since this is a new topic.

I don't have the deep knowledge like Chris, Steven or Alan.

I guess most python installations have setuptools. But this is only my naive vague guess.

How high is the percentage of python installation which don't have setuptools?

I have no clue. Is it 5%, 10%, 15% ...?

I know there is no definite answer to this question. But you can guess this better than me.

Regards,
  Thomas Güttler



Am 10.08.2017 um 12:01 schrieb Chris Warrick:
 > On 9 August 2017 at 23:15, Steven D'Aprano <steve at pearwood.info> wrote:
 >> On Tue, Aug 08, 2017 at 12:56:56PM +0200, Chris Warrick wrote:
 >>
 >>> While setuptools is not officially part of the stdlib,
 >>
 >> This is the critical factor. How can you use *by default* something that
 >> is *NOT* supplied by default?
 >>
 >> Obviously you cannot. It is physically impossible.
 >
 >
 > The problem with setuptools (and pip) is that they are not first-party
 > stdlib members, but they are not third-party packages either. They’re
 > somewhere in between. They have been blessed by the core developers.
 > And yes, setuptools might be in all the places you mentioned:
 >
 >> But this does NOT hold for everyone, possibly not even for the majority
 >> of Python users. For example:
 >>
 >> - students using their school's computers;
 >>
 >> - corporate and government users using a SOE (Standard Operating
 >>    Environment);
 >>
 >> - people using a system where, for policy reasons, only the
 >>    standard library is permitted.
 >
 > * If those computers run Windows (as they often do) and run a recent
 > Python version (3.4 or newer/2.7.9 or newer), setuptools will be
 > installed, unless the IT people explicitly disabled ensurepip.
 > * On macOS, setuptools will be installed if they’re using the system
 > Python, the python.org installers (which are not uninstallable), or
 > Python from Homebrew. The last two also have pip, and system Python
 > has ensurepip.
 > * On Linux, setuptools/pip is likely to be there, but it’s not
 > required in all distributions. (Fedora mandates setuptools; Debian
 > even rips out ensurepip by default and hides it in python3-venv
 > because reasons…)
 >
 > If the users are meant to install Python packages, their system
 > administrators would take care of that — either by setting up
 > setuptools/pip and perhaps virtualenv, or taking install requests from
 > users. If users are not supposed to be running setuptools/pip, they
 > probably shouldn’t, but they can still install it from ensurepip or
 > downloading get-pip.py.
 >
 >> I've worked in places where installing unauthorized software was a
 >> firing offence.
 >
 > Those people don’t need setuptools. Those people should not be using
 > distutils either. They might not even be allowed to download packages
 > and run __main__.py without installation.
 >
-- 
Thomas Guettler http://www.thomas-guettler.de/


-- 
Thomas Guettler http://www.thomas-guettler.de/