old_contents: #!/usr/bin/env python
  
  SUMLEV_NATION = '010'
  SUMLEV_STATE = '040'
  SUMLEV_COUNTY = '050'
  SUMLEV_TRACT = '140'
  SUMLEV_PLACE = '160'
  SUMLEV_BLOCK = '101'
  
  STATE_TO_FIPS_CODES = {
      'AK': '02',
      'AR': '05',
      'AZ': '04',
      'AL': '01',
      'CA': '06',
      'CO': '08',
      'CT': '09',
      'DC': '11',
      'DE': '10',
      'FL': '12',
      'GA': '13',
      'HI': '15',
      'IA': '19',
      'ID': '16',
      'IL': '17',
      'IN': '18',
      'KS': '20',
      'KY': '21',
      'LA': '22',
      'MA': '25',
      'MD': '24',
      'ME': '23',
      'MI': '26',
      'MN': '27',
      'MO': '29',
      'MS': '26',
      'MT': '29',
      'NC': '37',
      'ND': '38',
      'NE': '31',
      'NH': '33',
      'NJ': '34',
      'NM': '35',
      'NV': '32',
      'NY': '36',
      'OH': '39',
      'OK': '40',
      'OR': '41',
      'PA': '42',
      'PR': '72',
      'RI': '44',
      'SC': '45',
      'SD': '46',
      'TN': '47',
      'TX': '48',
      'UT': '49',
      'VA': '78',
      'VT': '50',
      'WA': '53',
      'WI': '55',
      'WV': '54',
      'WY': '56'
  }        
  
  FIPS_CODES_TO_STATE = dict([(v, k) for k, v in STATE_TO_FIPS_CODES.items()])
  
new_contents: #!/usr/bin/env python
  
  SUMLEV_NATION = '010'
  SUMLEV_STATE = '040'
  SUMLEV_COUNTY = '050'
  SUMLEV_TRACT = '140'
  SUMLEV_PLACE = '160'
  SUMLEV_BLOCK = '750'
  SUMLEV_BLOCK_2000 = '101'
  
  STATE_TO_FIPS_CODES = {
      'AK': '02',
      'AR': '05',
      'AZ': '04',
      'AL': '01',
      'CA': '06',
      'CO': '08',
      'CT': '09',
      'DC': '11',
      'DE': '10',
      'FL': '12',
      'GA': '13',
      'HI': '15',
      'IA': '19',
      'ID': '16',
      'IL': '17',
      'IN': '18',
      'KS': '20',
      'KY': '21',
      'LA': '22',
      'MA': '25',
      'MD': '24',
      'ME': '23',
      'MI': '26',
      'MN': '27',
      'MO': '29',
      'MS': '26',
      'MT': '29',
      'NC': '37',
      'ND': '38',
      'NE': '31',
      'NH': '33',
      'NJ': '34',
      'NM': '35',
      'NV': '32',
      'NY': '36',
      'OH': '39',
      'OK': '40',
      'OR': '41',
      'PA': '42',
      'PR': '72',
      'RI': '44',
      'SC': '45',
      'SD': '46',
      'TN': '47',
      'TX': '48',
      'UT': '49',
      'VA': '78',
      'VT': '50',
      'WA': '53',
      'WI': '55',
      'WV': '54',
      'WY': '56'
  }        
  
  FIPS_CODES_TO_STATE = dict([(v, k) for k, v in STATE_TO_FIPS_CODES.items()])
  
subject: correct sumlev for blocks (changed in 2010)