@smth hank you for the help!
unfortunately, having empty virtualenv of size 4.8 mb, after the command:
pip install https://download.pytorch.org/whl/cpu/torch-1.5.0-cp37-none-macosx_10_9_x86_64.whl
or command
pip install torch
venv grows to 375 mb.
I’m using Python 3.7 and macOS Catalina 10.15.4
My lib catalog in venv looks like this:

16M caffe2
4,0K easy-install.pth
3,0M future
56K future-0.18.2.dist-info
292K libfuturize
236K libpasteurize
86M numpy
132K numpy-1.18.3.dist-info
116K past
7,3M pip-19.0.3-py3.7.egg
560K setuptools-40.8.0-py3.7.egg
4,0K setuptools.pth
256M torch
352K torch-1.5.0.dist-info