code: def seasonal_subset(dataframe,
                      months='all'):
      '''Get the seasonal data.
  
      Parameters
      ----------
      dataframe : pd.DataFrame
      months: int, str
          Months to use for statistics, or 'all' for 1-12 (default='all')
      '''
  
      if isinstance(months, str) and months == 'all':
          months = np.arange(12) + 1
  
      for month_num, month in enumerate(months):
          df_cur = dataframe[dataframe.index.month == month]
  
          if month_num == 0:
              df = df_cur
          else:
              df = df.append(df_cur)
  
      return df.sort_index(f seasonal_subset(dataframe,
                      months='all'):
      '''Get the seasonal data.
  
      Parameters
      ----------
      dataframe : pd.DataFrame
      months: int, str
          Months to use for statistics, or 'all' for 1-12 (default='all')
      '''
  
      if isinstance(months, str) and months == 'all':
          months = np.arange(12) + 1
  
      for month_num, month in enumerate(months):
          df_cur = dataframe[dataframe.index.month == month]
  
          if month_num == 0:
              df = df_cur
          else:
              df = df.append(df_cur)
  
      return df.sort_index()
docs: Get the seasonal data.
  
      Parameters
      ----------
      dataframe : pd.DataFrame
      months: int, str
          Months to use for statistics, or 'all' for 1-12 (default='all')