sycan.cas

sycan.cas — pluggable CAS backend.

Sycan keeps every symbolic primitive — Symbol, Matrix, solve(), simplify(), etc. — behind this thin proxy module so that the underlying CAS library can be swapped without touching the rest of the codebase. Today only "sympy" is wired up; future backends can be added by writing another _<name>_backend.py and extending select_backend().

Typical use:

from sycan import cas as cas
x = cas.Symbol("x")
cas.solve(cas.Eq(x**2, 4), x)

To force a specific backend (otherwise "sympy" is selected on first attribute access):

from sycan import cas
cas.select_backend("sympy")

The proxy forwards getattr to the active backend module, so any name the backend exposes is reachable directly — both as attribute access (cas.Matrix) and as from sycan.cas import Matrix.

Functions

available_backends()	Return the tuple of backend names recognised by select_backend().
backend_name()	Return the active backend's name (selecting the default if needed).
select_backend(name)	Choose the active CAS backend.

sycan.cas.select_backend(name)

Choose the active CAS backend.

Parameters:

name (str) – Backend identifier. Currently supported values are "sympy" (default, full coverage) and "symengine" (fast C++ core; simplify / solve / factor and friends bridge to sympy under the hood, the rest runs natively in symengine).

Return type:

None

sycan.cas.backend_name()

Return the active backend’s name (selecting the default if needed).

Return type:

str

sycan.cas.available_backends()

Return the tuple of backend names recognised by select_backend().

Return type:

tuple[str, …]