[

   ...:     method_name

   ...:     for method_name in dir(air_quality.plot)

   ...:     if not method_name.startswith("_")

   ...: ]

   ...: 

Out[8]: 

['area',

 'bar',

 'barh',

 'box',

 'density',

 'hexbin',

 'hist',

 'kde',

 'line',

 'pie',

 'scatter']