@property
    def headers(self) -> dict:
        return {"app_id": self.mathpix_api_id, "app_key": self.mathpix_api_key}
    @property
    def url(self) -> str:
        return "https://api.mathpix.com/v3/pdf"
    @property
    def data(self) -> dict:
        options = {"conversion_formats": {self.processed_file_format: True}}
        return {"options_json": json.dumps(options)}
[docs]    def send_pdf(self) -> str:
        with open(self.file_path, "rb") as f:
            files = {"file": f}
            response = requests.post(
                self.url, headers=self.headers, files=files, data=self.data
            )
        response_data = response.json()
        if "pdf_id" in response_data:
            pdf_id = response_data["pdf_id"]
            return pdf_id
        else:
            raise ValueError("Unable to send PDF to Mathpix.")
[docs]    def wait_for_processing(self, pdf_id: str) -> None:
        url = self.url + "/" + pdf_id
        for _ in range(0, self.max_wait_time_seconds, 5):
            response = requests.get(url, headers=self.headers)
            response_data = response.json()
            status = response_data.get("status", None)
            if status == "completed":
                return
            elif status == "error":
                raise ValueError("Unable to retrieve PDF from Mathpix")
            else:
                print(f"Status: {status}, waiting for processing to complete")
                time.sleep(5)
        raise TimeoutError
[docs]    def get_processed_pdf(self, pdf_id: str) -> str:
        self.wait_for_processing(pdf_id)
rtdocs_stable/api.python.langchain.com/en/stable/_modules/langchain/document_loaders/pdf.html