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Fix TypeError in pqk data_map_func with unbound ParameterExpression (Qiskit 2.2.0) #7

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Fix TypeError in pqk data_map_func with unbound ParameterExpression (Qiskit 2.2.0) #7

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8 changes: 7 additions & 1 deletion qbiocode/embeddings/embed.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,7 +66,13 @@ def data_map_func(x: np.ndarray) -> float:
float: the mapped value
"""
coeff = x[0] / 2 if len(x) == 1 else reduce(lambda m, n: (m * n) / 2, x)
return float(coeff)
try:
return float(coeff)
except TypeError:
# coeff is a symbolic ParameterExpression during circuit
# construction (unbound parameters) — return it unevaluated
# and let Qiskit bind real values later.
return coeff

else:
data_map_func = None
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