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matplotlib.axis.YAxis.get_major_ticks
YAxis.get_major_ticks(self, numticks=None)- 
    
Get the tick instances; grow as necessary.
 
Examples using matplotlib.axis.YAxis.get_major_ticks
  
  
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 https://matplotlib.org/3.2.2/api/_as_gen/matplotlib.axis.YAxis.get_major_ticks.html