add types

qadence_libs/types.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from qadence.types import StrEnum
+
+__all__ = ["BasisSet", "ReuploadScaling"]
+
+
+class BasisSet(StrEnum):
+    """Basis set for feature maps."""
+
+    FOURIER = "Fourier"
+    """Fourier basis set."""
+    CHEBYSHEV = "Chebyshev"
+    """Chebyshev polynomials of the first kind."""
+
+
+class ReuploadScaling(StrEnum):
+    """Scaling for data reuploads in feature maps."""
+
+    CONSTANT = "Constant"
+    """Constant scaling."""
+    TOWER = "Tower"
+    """Linearly increasing scaling."""
+    EXP = "Exponential"
+    """Exponentially increasing scaling."""