Read and edit PDF metadata (standard and XML metadata) in Python using PyMuPDF library. Check https://products.documentprocessing.com/metadata/python/pymupdf/ for more details.

edit-metadata-of-pdfs-using-pymupdf-library.py

# Import PyMuPDF library
import fitz

# Open the PDF file
doc = fitz.open('documentprocessing.pdf')

# Define new metadata
new_metadata = {
    'author': 'Document Processing',
    'title': 'Test Document',
    'subject': 'Test document to review document processing libraries'
}

# Set the new metadata in the document
doc.set_metadata(new_metadata)

# Save the document with the changes
doc.save("doc.pdf")

# Close the document to release resources
doc.close()

edit-xml-metadata-of-pdfs-using-pymupdf-library.py

# Import the PyMuPDF library
import fitz

# Open the PDF file
doc = fitz.open("documentprocessing.pdf")

# Get the current metadata as XML
xml_metadata = doc.get_xml_metadata()

# Update the creator field in the XML metadata
updated_xml_metadata = xml_metadata.replace(
    '<rdf:li>Document</rdf:li>',
    f'<rdf:li>Document Processing</rdf:li>'
)

# Set the updated XML metadata in the PDF document
doc.set_xml_metadata(updated_xml_metadata)

# Save the changes to a new PDF file
doc.save("data.pdf")

# Close the PDF document
doc.close()

read-pdf-metadata-using-pymupdf-library.py

# Import PyMuPDF library
import fitz

# Import pprint module for pretty printing
from pprint import pprint

# Open the PDF file using PyMuPDF
doc = fitz.open('doc.pdf')

# Pretty print the metadata of the opened PDF
pprint(doc.metadata)

# Close the PDF document to release resources
doc.close()

read-xml-metadata-of-pdfs-using-pymupdf-library.py

# Import the PyMuPDF module
import fitz

# Open the PDF file
doc = fitz.open("data.pdf")

# Print the XML metadata of the PDF document
print(doc.get_xml_metadata())

# Close the PDF document
doc.close()