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matplotlib.axis.Axis.set_label_position
Axis.set_label_position(self, position)[source]- 
    
Set the label position (top or bottom)
Parameters: - 
           
position{'top', 'bottom'} 
 - 
           
 
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 https://matplotlib.org/3.2.2/api/_as_gen/matplotlib.axis.Axis.set_label_position.html