code: def get_name_from_abbrev(abbrev, case_sensitive=False):
      
      if case_sensitive:
          country_code = abbrev
      else:
          country_code = abbrev.upper()
  
      for code, full_name in COUNTRY_TUPLES:
          if country_code == code:
              return full_name
  
      raise KeyError('No country with that country code.')
docs: Given a country code abbreviation, get the full name from the table.
  
      abbrev: (str) Country code to retrieve the full name of.
      case_sensitive: (bool) When True, enforce case sensitivity.