matplotlib.pyplot.text(x, y, s, fontdict=None, withdash=False, **kwargs)
- x, y:表示坐标;
 - s:字符串文本;
 - fontdict:字典,可选;
 - kw: 
- fontsize=12,
 - horizontalalignment=‘center’、ha=’cener’
 - verticalalignment=’center’、va=’center’
 
 
fig.text()(fig = plt.figure(…))
- ax.text()(ax = plt.subplot(…))
 
                    
                
                
            
        
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