def by_education_category_id(self,education_category_id: str) -> EducationCategoryItemRequestBuilder:
        """
        Gets an item from the msgraph.generated.education.me.assignments.item.categories.item collection
        param education_category_id: The unique identifier of educationCategory
        Returns: EducationCategoryItemRequestBuilder
        """
        if education_category_id is None:
            raise TypeError("education_category_id cannot be null.")
        from .item.education_category_item_request_builder import EducationCategoryItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["educationCategory%2Did"] = education_category_id
        return EducationCategoryItemRequestBuilder(self.request_adapter, url_tpl_params)

        Gets an item from the msgraph.generated.education.me.assignments.item.categories.item collection
        param education_category_id: The unique identifier of educationCategory
        Returns: EducationCategoryItemRequestBuilder
        
msgraph/generated/education/me/assignments/item/categories/categories_request_builder.py