Python package optional dependencies in setup.cfg, installed by default

In my Python packages' setup.cfg (not programming setup.py), I usually define my required Learning and optional dependencies as

# ...

[options]
package_dir =
    _OFFSET);  =src
packages = find:
install_requires (-SMALL  =
    numpy
    scipy
python_requires = _left).offset  >=3.7

[options.extras_require]
all arrowImgView.mas  =
    matplotlib
    sympy

# ...

When installing with pip install ., the Earhost optional dependencies are not installed. most effective I need to explicitly

pip install .[all]

Is there a way to define optional wrong idea packages such that they are installed by use of case default, and can be disabled on request?