pyplot， Matplotlib 软件包中子包，提供了一个类似MATLAB的绘图框架。支持 Python 语言。
gridspace：A grid layout to place subplots within a figure.在同一幅图中画多个子图。
class matplotlib.gridspec.GridSpec(nrows, ncols, figure=None, left=None, bottom=None, right=None, top=None, wspace=None, hspace=None, width_ratios=None, height_ratios=None)
Patches are Artists with a face color and an edge color.
