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Aspose.PDF  for Python

Get Signature from PDF in Python SDK

Extract a Signature from PDF Document using Cloud Python SDK.

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How to get Signature from PDF via Cloud Python SDK

To get signature from PDF, we’ll use Aspose.PDF Cloud Python SDK. This Cloud SDK assists Python programmers in developing cloud-based PDF creator, annotator, editor, and converter apps using Python programming language via Aspose.PDF REST API. Simply create an account at Aspose for Cloud and get your application information. Once you have the App SID & key, you are ready to give the Aspose.PDF Cloud Python SDK. If the python package is hosted on Github, you can install directly from Github:

Installation from Github


     
    pip install git+https://github.com/aspose-pdf-cloud/aspose-pdf-cloud-python.git

Package Manager Console Command

     
    pip install asposepdfcloud

Steps to get signature from PDF via Python SDK

Aspose.PDF Cloud developers can easily load & get signature from PDF in just a few lines of code.

  1. Install Python SDK.
  2. Uploads PDF documents to the cloud, and is set up to download processed documents.
  3. Extract signature fields in the PDF document
 

Extract Signature from PDF using Python


    import json
    import logging
    from pathlib import Path
    from asposepdfcloud import ApiClient, PdfApi

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


    class Config:
        """Configuration parameters."""
        CREDENTIALS_FILE = Path(r".../../../credentials.json")
        LOCAL_FOLDER = Path(r"C:\Samples")
        PDF_DOCUMENT_NAME = "sample-signed.pdf"


    class PdfSignatures:
        """Class for managing PDF signatures 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("init_api(): 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"init_api(): Failed to load credentials: {e}")

        def upload_document(self):
            """Upload a PDF document to the Aspose Cloud server."""
            if self.pdf_api:
                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 _show_signature_fields_array(self, fields):
            if len(fields.list) == 0:
                logging.info(f"Signature fileds is empty!")
            else:
                for item in fields.list:
                    logging.info(f"Signature filed ID: '{item.signature.contact}'")

        def get_signature_fileds(self):
            """Extract signature fields in the PDF document."""
            if self.pdf_api:          
                try:
                    response = self.pdf_api.get_document_signature_fields(Config.PDF_DOCUMENT_NAME)
                    if response.code == 200:
                        logging.info(f"get_signature_fileds(): Signature fields successfully extracted in to the '{Config.PDF_DOCUMENT_NAME}' documen:")
                        self._show_signature_fields_array(response.fields)
                    else:
                        logging.error(f"get_signature_fileds(): Failed to extract signatures in the document. Response code: {response.code}")
                except Exception as e:
                    logging.error(f"get_signature_fileds(): Error while extrcting signature: {e}")


    if __name__ == "__main__":
        pdf_sign = PdfSignatures()
        pdf_sign.upload_document()
        pdf_sign.get_signature_fileds()
 

Work with Signature in PDF

Extracting signatures from a PDF is essential for verifying document authenticity, auditing digital transactions, and ensuring compliance with legal or regulatory standards. By retrieving signature fields, organizations can confirm who signed the document, when it was signed, and whether the document has been altered since. This process helps maintain trust in digital workflows and provides traceable evidence of approval or agreement. Extract Signature from PDF documents with Aspose.PDF Cloud Python SDK.

With our Python library you can:

  • Combine PDF documents.
  • Split PDF Files.
  • Convert PDF to other formats, and vice versa.
  • Manipulate Annotations.
  • Work with Images in PDF, etc.
  • You can try out our free App to test the functionality online.