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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_component_info(self, compinfo):
 """Add sub-component specific information to a particular data selection Parameters compinfo : `ModelComponentInfo` object Sub-component being added """

        if self.components is None:
            self.components = {}
        self.components[compinfo.comp_key] = compinfo