arrays – Rectilinear arrays to be converted to NumPy arrays of at least 1 dimension.
axis (int) – The dimension at which this operation is applied. The outermost dimension is
0, followed by
1, etc., and negative values count backward from the innermost:
-1is the innermost dimension,
-2is the next level up, etc.
arrays are not all rectilinear (i.e. if #np.to_numpy would raise an
error), then this function raise an error.
Note: this function returns a NumPy array, not an Awkward Array.