code: def camel_case_from_underscores(string):
      
  
      components = string.split('_')
      string = ''
  
      for component in components:
          if component in abbreviations:
              string += component
          else:
              string += component[0].upper() + component[1:].lower()
  
      return string
docs: Generate a CamelCase string from an underscore_string