Add symbolic backends

.gitignore

@@ -1,2 +1,5 @@
 *~
-__pycache__/
+__pycache__/
+*.egg-info/
+./*/_version.py
+/graphix_symbolic/_version.py

graphix_symbolic/__init__.py

@@ -1,3 +1,5 @@
+from graphix_symbolic.density_matrix import DensityMatrix, DensityMatrixBackend
+from graphix_symbolic.statevec import Statevec, StatevectorBackend
 from graphix_symbolic.sympy_parameter import SympyParameter
 
-__all__ = ["SympyParameter"]
+__all__ = ["DensityMatrix", "DensityMatrixBackend", "Statevec", "StatevectorBackend", "SympyParameter"]

graphix_symbolic/_version.py

@@ -0,0 +1,24 @@
+# file generated by vcs-versioning
+# don't change, don't track in version control
+from __future__ import annotations
+
+__all__ = [
+    "__version__",
+    "__version_tuple__",
+    "version",
+    "version_tuple",
+    "__commit_id__",
+    "commit_id",
+]
+
+version: str
+__version__: str
+__version_tuple__: tuple[int | str, ...]
+version_tuple: tuple[int | str, ...]
+commit_id: str | None
+__commit_id__: str | None
+
+__version__ = version = '0.1.dev11+g0221c7919.d20260528'
+__version_tuple__ = version_tuple = (0, 1, 'dev11', 'g0221c7919.d20260528')
+
+__commit_id__ = commit_id = 'g0221c7919'