original_docstring: 
          Param: df is a DataFrame like data.
          
docstring: df is a DataFrame like data.
docstring_tokens: df is a DataFrame like data .
code: def data_cleaning(self, df):
          """
          Param: df is a DataFrame like data.
          """
          df.drop(['stock_code'], axis=1, inplace=True)
          df.replace('None', np.nan, inplace=True)
          df = df.dropna(axis=0, how='any')
          return df
code_tokens: def data_cleaning ( self , df ) : df . drop ( [ 'stock_code' ] , axis = 1 , inplace = True ) df . replace ( 'None' , np . nan , inplace = True ) df = df . dropna ( axis = 0 , how = 'any' ) return df
short_docstring: Param: df is a DataFrame like data.
short_docstring_tokens: Param : df is a DataFrame like data .
comment: """
          Param: df is a DataFrame like data.
          """