Ensure sigma and mu are scalar for wrapped normal

Author: FlorianPfaff

pyrecest/distributions/circle/wrapped_normal_distribution.py

@@ -50,6 +50,10 @@ def __init__(
         """
         AbstractCircularDistribution.__init__(self)
         HypertoroidalWrappedNormalDistribution.__init__(self, mu, sigma**2)
+        if ndim(mu) != 0:
+            raise ValueError(f"mu must be a scalar, but got shape {mu.shape}.")
+        if ndim(sigma) != 0:
+            raise ValueError(f"sigma must be a scalar, but got shape {sigma.shape}.")
 
     @property
     def sigma(self):