Add numpy constants to pytensor.tensor scope

[ricardoV94]

One can thus write:

import pytensor.tensor as pt

x = pt.scalar("x")
y = x * pt.pi

[michaelosthege]

Isn't the __all__ in there totally incomplete? It exports only the random submodule, but not even the *-imported stuff

[ricardoV94]

Isn't the __all__ in there totally incomplete? It exports only the random submodule, but not even the *-imported stuff

No idea why it was needed to add the random, but we probably don't want to list everything explicitly. It also looked funny to me.