{"record":{"id":"1c2e67c7243330a6","repo":"microsoft/qlib","slug":"please-implement-the-calculate-stock-value-metho","errorCode":null,"errorMessage":"Please implement the `calculate_stock_value` method","messagePattern":"Please implement the `calculate_stock_value` method","errorType":"exception","errorClass":"NotImplementedError","httpStatus":null,"severity":"error","filePath":"qlib/backtest/position.py","lineNumber":95,"sourceCode":"        Parameters\n        ----------\n        stock_id :\n            the id of the stock\n        price : float\n            the price to be updated\n        \"\"\"\n        raise NotImplementedError(f\"Please implement the `update stock price` method\")\n\n    def calculate_stock_value(self) -> float:\n        \"\"\"\n        calculate the value of the all assets except cash in the position\n\n        Returns\n        -------\n        float:\n            the value(money) of all the stock\n        \"\"\"\n        raise NotImplementedError(f\"Please implement the `calculate_stock_value` method\")\n\n    def calculate_value(self) -> float:\n        raise NotImplementedError(f\"Please implement the `calculate_value` method\")\n\n    def get_stock_list(self) -> List[str]:\n        \"\"\"\n        Get the list of stocks in the position.\n        \"\"\"\n        raise NotImplementedError(f\"Please implement the `get_stock_list` method\")\n\n    def get_stock_price(self, code: str) -> float:\n        \"\"\"\n        get the latest price of the stock\n\n        Parameters\n        ----------\n        code :\n            the code of the stock","sourceCodeStart":77,"sourceCodeEnd":113,"githubUrl":"https://github.com/microsoft/qlib/blob/79633dd9506ea689e5400dea0197717b5b3d74b7/qlib/backtest/position.py#L77-L113","documentation":"Error \"Please implement the `calculate_stock_value` method\" thrown in microsoft/qlib.","triggerScenarios":"This error is raised at qlib/backtest/position.py:95 when the guard condition fails: \"Please implement the `calculate_stock_value` method\". It triggers when the code path receives input or a state that violates the precondition checked at this point — e.g. an unimplemented abstract method being called, an unsupported argument type/value, or an invalid configuration. To avoid it, satisfy the documented precondition before this call: implement the required method in your subclass, or pass a supported value of the expected type as described by the message.","commonSituations":"See trigger scenarios.","solutions":["Implement the `calculate_stock_value` method in your Position subclass before calling it.","Use the built-in Position class which already implements `calculate_stock_value`."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"79633dd9506ea689e5400dea0197717b5b3d74b7","analyzedAt":"2026-08-15T07:01:27.511Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}