variable-length-array

Convert Python sequence to NumPy array, filling missing values Question: The implicit conversion of a Python sequence of variable-length lists into a NumPy array cause the array to be of type object. v = [[1], [1, 2]] np.array(v) >>> array([[1], [1, 2]], dtype=object) Trying to force another type will cause an exception: np.array(v, dtype=np.int32) ValueError: …