Using a particular python binary with venv

[greenba...@gmail.com]

According to this https://docs.python.org/3.4/library/venv.html#module-venv 'Each virtual environment has its own Python binary (allowing creation of environments with various Python versions)'
So how would I create a virtual environment using the venv module that has a Python 2.7 binary?
tia
g

[Ian Kelly]

On Mon, Jun 1, 2015 at 3:33 PM, <greenba...@gmail.com> wrote:
> According to this https://docs.python.org/3.4/library/venv.html#module-venv 'Each virtual environment has its own Python binary (allowing creation of environments with various Python versions)'
> So how would I create a virtual environment using the venv module that has a Python 2.7 binary?

I wouldn't recommend trying to create a venv virtual environment using
Python 2.7, because venv was only added to the standard library in
Python 3.3. Use the third-party virtualenv instead.

[Carl Meyer]

You can't. The venv module only exists in and supports Python 3.3+.

If you need to support earlier Django versions, you'll need to use the
older "virtualenv" library instead, which looks very similar from the
end-user side. See https://virtualenv.pypa.io/en/latest/

Carl

[Laura Creighton]

In a message of Mon, 01 Jun 2015 14:33:56 -0700, greenba...@gmail.com writ
es:

>--
>https://mail.python.org/mailman/listinfo/python-list

#If you haven't already got it
pip install virtualenv

#Then

cd where_I_want_to_work
virtualenv -p /usr/bin/python2.7 venv
source venv/bin/activate
pip install packages_i_need

# when you are done
deactivate

to get back to your system python.

Laura

[greenba...@gmail.com]

On Tuesday, 2 June 2015 09:43:37 UTC+12, Carl Meyer wrote:

Thanks Carl
I am guessing that the documentation needs to be altered then. I will submit a documentation bug...
cheers
g

[Carl Meyer]

On 06/01/2015 04:07 PM, greenba...@gmail.com wrote:
> On Tuesday, 2 June 2015 09:43:37 UTC+12, Carl Meyer wrote:
>> On 06/01/2015 03:33 PM, orotau wrote:
>>> According to this
>>> https://docs.python.org/3.4/library/venv.html#module-venv 'Each
>>> virtual environment has its own Python binary (allowing creation of
>>> environments with various Python versions)'
>>>
>>> So how would I create a virtual environment using the venv module
>>> that has a Python 2.7 binary?
>>
>> You can't. The venv module only exists in and supports Python 3.3+.
>>
>> If you need to support earlier Django versions, you'll need to use the
>> older "virtualenv" library instead, which looks very similar from the
>> end-user side. See https://virtualenv.pypa.io/en/latest/
>

> Thanks Carl
> I am guessing that the documentation needs to be altered then. I will submit a documentation bug...

I think the documentation is accurate as written (you _can_ create
environments with various Python versions, they just have to be versions
that include and support the venv module), but a clarification on the
supported Python versions in that sentence seems reasonable to me.

Carl

[greenba...@gmail.com]

http://bugs.python.org/issue24356