code: def lower_camel_case_from_underscores(string):
      
      components = string.split('_')
      string = components[0]
      for component in components[1:]:
          string += component[0].upper() + component[1:]
      return string
docs: generate a lower-cased camelCase string from an underscore_string.
      For example: my_variable_name -> myVariableName