NumPy系统是Python的一种开源的数值计算扩展。这种工具可用来存储和处理大型矩阵，比Python自身的嵌套列表（nested list structure)结构要高效的多（该结构也可以用来表示矩阵（matrix））。据说NumPy将Python相当于变成一种免费的更强大的MatLab系统。-NumPy system is an open source Python numerical calculation extensions. This tool can be used to store and process large matrix structures much more efficient than Python itself nested lists (nested list structure) (This structure can also be used to represent matrix (matrix)). Python NumPy will reportedly become the equivalent of a free, more powerful MatLab system.