Attempt to build python 3.7.0 on OpenSuse Leap 15

[snippsat]

but want to verify that the activate script is no longer needed (because I can't find one in the bin directory).

It should be just the same as before using venv(also it's builds into python).
Here a test using 3.7:

mint@mint / $ python -V
Python 3.7.0

# Make 
mint@mint ~ $ python -m venv env_test

# Cd in
mint@mint ~ $ cd env_test

# Activate
mint@mint ~/env_test $ source bin/activate

# Test python an pip using environment 
(env_test) mint@mint ~/env_test $ which python
/home/mint/env_test/bin/python

(env_test) mint@mint ~/env_test $ pip -V
pip 10.0.1 from /home/mint/env_test/lib/python3.7/site-packages/pip (python 3.7)

There is no difference compare to 3.6.
The bin folder get generated when using venv.
A look at bin folder in environment,there is a activate file there.

env_test) mint@mint ~/env_test $ ls bin
activate  activate.csh  activate.fish  easy_install  easy_install-3.7  pip  pip3  pip3.7  python  python3