python3_matplotlib_figure()函数解析

1.绘图库导入

import
import

2.创建一个图形实例

plt.figure(figsize=(15,5

figure说明：The Figure instance returned will also be passed to new_figure_manager in the backends, which allows to hook custom Figure classes into the pylab interface. Additional kwargs will be passed to the figure init function。

note:If you are creating many figures, make sure you explicitly call "close" on the figures you are not using, because this will enable pylab to properly clean up the memory.

注意：如果你创建了多个figure实例，必须确保你显式的调用“close”来释放你已经不再使用的figure实例。因为只有这样pylab才能正确的释放内存。

3.函数头：

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defNoneNoneNoneNoneNoneTrueFalse

4.参数说明:

num : integer or string, optional, default: none
If not provided, a new figure will be created, and the figure number will be incremented. The figure objects holds this number in a number attribute. If num is provided, and a figure with this id already exists, make it active, and returns a reference to it. If this figure does not exists, create it and returns it. If num is a string, the window title will be set to this figure's num.

num:如果此参数没有提供，则一个新的figure对象将被创建，同时增加figure的计数数值，此数值被保存在figure对象的一个数字属性当中。如果有此参数，且存在对应id的figure对象，则激活对于id的figure对象。如果对应id的figur对象不存在，则创建它并返回它。如果num的值是字符串，则将窗口标题设置为此字符串。

figsize : tuple of integers, optional, default: None

width, height in inches. If not provided, defaults to rc figure.figsize

figsize:以英寸为单位的宽高，缺省值为 rc figure.figsize (1英寸等于2.54厘米)

实验：

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