old_contents: import numpy as np
  import pandas as pd
  import requests
  import json
  
  class EIA(object):
      
      def __init__(self, token: str, series_id: str):
          """Fetch data from www.eia.gov
          
          Attributes
          ----------
          token: str
              EIA token
          series_id : str
              series id
          
          Methods
          -------
          getData(token: str, series_id: str)
              Fetch data from website and return a pd.Series()
              
          Examples
          -------
          # Get daily prices of natural gas, series id NG.RNGC1.D
          # http://www.eia.gov/beta/api/qb.cfm?category=462457&sdid=NG.RNGC1.D
          token = 'YOUR_EIA_TOKEN'
          nat_gas = 'NG.RNGC1.D'
          eia = EIA(token, nat_gas)
          print(eia.getData())
          """
          self.token = token
          self.series_id = series_id
   
      def getData(self) -> pd.Series:
          # Construct url
          url = 'http://api.eia.gov/series/?api_key=' + self.token + '&series_id=' + self.series_id.upper()
  
          try:
              # Fetch data
              r = requests.get(url)
              jso = r.json()
              dic = jso['series'][0]['data']
  
              # Create series object
              lst_dates = np.column_stack(dic)[0]
              lst_values = np.column_stack(dic)[1]
              data = pd.Series(data=lst_values,
                               index=lst_dates)
              data.index = pd.to_datetime(data.index)
              data.name = self.series_id
  
              return data
          
          # Except anything
          except Exception as e:
              print(e)
  
new_contents: # """ eia.py """
  
  import numpy as np
  import pandas as pd
  import requests
  import json
  
  class EIA(object):
      
      def __init__(self, token: str, series_id: str):
          """Fetch data from www.eia.gov
          
          Attributes
          ----------
          token: str
              EIA token
          series_id : str
              series id
          
          Methods
          -------
          getData(token: str, series_id: str)
              Fetch data from website and return a pd.Series()
              
          Examples
          -------
          # Get daily prices of natural gas, series id NG.RNGC1.D
          # http://www.eia.gov/beta/api/qb.cfm?category=462457&sdid=NG.RNGC1.D
          token = 'YOUR_EIA_TOKEN'
          nat_gas = 'NG.RNGC1.D'
          eia = EIA(token, nat_gas)
          print(eia.getData())
          """
          self.token = token
          self.series_id = series_id
   
      def getData(self) -> pd.Series:
          # Url
          url = 'http://api.eia.gov/series/?api_key={}&series_id={}'.format(self.token, self.series_id.upper()) 
          
          # Fetch data
          try:
              r = requests.get(url)
              jso = r.json()
              dic = jso['series'][0]['data']
  
              # Create series object
              lst_dates = np.column_stack(dic)[0]
              lst_values = np.column_stack(dic)[1]
              data = pd.Series(data=lst_values,
                               index=lst_dates)
              data.index = pd.to_datetime(data.index)
              data.name = self.series_id
  
              return data
          
          # Except anything
          except Exception as e:
              print(e)
  
subject: Update eia.py