Load modules in when starting the python interpreter, if available.

.python_startup.py

MOD_LIST = [
    ['math'],
    ['tensorflow', 'tf'],
]


def load_module(module):
    import importlib
    assert len(module) in (1, 2), module
    try:
        globals()[module[-1]] = importlib.import_module(module[0])
    except ImportError:
        print("Module {} not loaded".format(module[0]))


for module in MOD_LIST:
    load_module(module)