numpy.concatenate# numpy.concatenate((a1, a2, ...), axis=0, out=None, dtype=None, casting="same_kind")# Join a sequence of arrays along an existing axis. Parameters: a1, a2, …sequence of array_likeThe arrays must have the same shape, except in the dimension corresponding to axis (the first, by default). axisint, optionalThe axis along which the arrays will be joined. If axis is None, arrays are fl