Replace Text in PDF in Python SDK

    import shutil
    import json
    import logging
    from pathlib import Path
    from asposepdfcloud import ApiClient, PdfApi, TextReplace, TextReplaceListRequest

    class Config:
        """Configuration parameters."""
        CREDENTIALS_FILE = Path(r"C:\\Projects\\ASPOSE\\Pdf.Cloud\\Credentials\\credentials.json")
        LOCAL_FOLDER = Path(r"C:\\Samples")
        PDF_DOCUMENT_NAME = "sample.pdf"
        LOCAL_RESULT_DOCUMENT_NAME = "output_sample.pdf"
        PAGE_NUMBER = 2
        TEXT_SOURCE_FOR_REPLACE = "YOUR source text"
        TEXT_NEW_VALUE = "YOUR new text"

    # Configure logging
    logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")

    class PdfTexts:
        """Class for managing PDF texts using Aspose PDF Cloud API."""

        def __init__(self, credentials_file: Path = Config.CREDENTIALS_FILE):
            self.pdf_api = None
            self._init_api(credentials_file)

        def _init_api(self, credentials_file: Path):
            """Initialize the API client."""
            try:
                with credentials_file.open("r", encoding="utf-8") as file:
                    credentials = json.load(file)
                    api_key, app_id = credentials.get("key"), credentials.get("id")
                    if not api_key or not app_id:
                        raise ValueError("Error: Missing API keys in the credentials file.")
                    self.pdf_api = PdfApi(ApiClient(api_key, app_id))
            except (FileNotFoundError, json.JSONDecodeError, ValueError) as e:
                logging.error(f"Failed to load credentials: {e}")

        def _ensure_api_initialized(self):
            """Check if the API is initialized before making API calls."""
            if not self.pdf_api:
                logging.error("PDF API is not initialized. Operation aborted.")
                return False
            return True

        def upload_document(self):
            """Upload a PDF document to the Aspose Cloud server."""
            if not self._ensure_api_initialized():
                return

            file_path = Config.LOCAL_FOLDER / Config.PDF_DOCUMENT_NAME
            try:
                self.pdf_api.upload_file(Config.PDF_DOCUMENT_NAME, str(file_path))
                logging.info(f"File {Config.PDF_DOCUMENT_NAME} uploaded successfully.")
            except Exception as e:
                logging.error(f"Failed to upload file: {e}")

        def download_result(self):
            """ Download the processed PDF document from the Aspose Cloud server """
            if not self._ensure_api_initialized():
                return

            try:
                temp_file = self.pdf_api.download_file(Config.PDF_DOCUMENT_NAME)
                local_path = Config.LOCAL_FOLDER / Config.LOCAL_RESULT_DOCUMENT_NAME
                shutil.move(temp_file, str(local_path))
                logging.info(f"download_result(): File successfully downloaded: {local_path}")
            except Exception as e:
                logging.error(f"download_result(): Failed to download file: {e}")

        def replace_document_texts(self):
            """ Replace text in the PDF document """
            if not self.pdf_api:
                return

            text_replace_obj = TextReplace(old_value=Config.TEXT_SOURCE_FOR_REPLACE, new_value=Config.TEXT_NEW_VALUE, regex=False)

            text_replace_request = TextReplaceListRequest([text_replace_obj])

            response = self.pdf_api.post_document_text_replace(
                Config.PDF_DOCUMENT_NAME, text_replace_request
            )

            if response.code == 200:
                print(f"Text '{Config.TEXT_SOURCE_FOR_REPLACE}' replaced with '{Config.TEXT_NEW_VALUE}' - successfully.")
            else:
                print("Failed to replace text in document.")

        def replace_page_texts(self):
            """ Replace text on the page in PDF document """
            if not self.pdf_api:
                return

            text_replace_obj = TextReplace(old_value=Config.TEXT_NEW_VALUE, new_value=Config.TEXT_SOURCE_FOR_REPLACE, regex=False)

            text_replace_request = TextReplaceListRequest([text_replace_obj])

            response = self.pdf_api.post_page_text_replace(
                Config.PDF_DOCUMENT_NAME,
                Config.PAGE_NUMBER,
                text_replace_request
            )

            if response.code == 200:
                print(f"Text '{Config.TEXT_NEW_VALUE}' replaced with '{Config.TEXT_SOURCE_FOR_REPLACE}' - successfully.")
            else:
                print("Failed to replace text in document.")



    if __name__ == "__main__":
        pdf_texts = PdfTexts()
        pdf_texts.upload_document()
        pdf_texts.replace_document_texts()
        pdf_texts.replace_page_texts()
        pdf_texts.download_result()