python - How to modify the text in a bar chart -

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I have created a chart once, with some text within each bar, now, if I could

I have created it like this: 

  # Some stuff ... ... modify the size of this text, font size, to reduce it a little bit. rects1 = plt.bar (test, y, bar_width, alpha = opacity, color = 'b') label = [] in rects1 for bar: height = bar.get_height () ax.text (bar.get_x) + bar get_width () / 4, 0.65 * height, '% .2f'% float (height), rotation = 'vertical', horizontal alignment = 'left', va = 'bottom') label.endend (bar.get_x) + bar.get_width () / 2.) ... ... ...   
 More results look more or less like this:  
 Enter image details here   
 
 
 You may be looking for:  
 For example you  
  ax.text (bar.get_x) + bar.get_widt h (vertical), horizontal alignment = 'left', va = 'bottom', weight = 'bold' )   
 To use a bold font, you can use fontsize = somenumber to change the font size.

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