Writer

soffice --writer template.odt

import uno

def create_document():
    local_ctx = uno.getComponentContext()
    resolver = local_ctx.ServiceManager.createInstanceWithContext(
        "com.sun.star.bridge.UnoUrlResolver", local_ctx
    )
    ctx = resolver.resolve(
        "uno:socket,host=localhost,port=8100;urp;StarOffice.ComponentContext"
    )
    smgr = ctx.ServiceManager
    doc = smgr.createInstanceWithContext("com.sun.star.text.TextDocument", ctx)
    text = doc.Text
    cursor = text.createTextCursor()
    text.insertString(cursor, "Hello from LibreOffice Writer!", 0)
    doc.storeToURL("file:///path/to/document.odt", ())
    doc.close(True)

from odf.opendocument import OpenDocumentText
from odf.text import P, H

doc = OpenDocumentText()
h1 = H(outlinelevel='1', text='Document Title')
doc.text.appendChild(h1)
doc.save("document.odt")

# ODT to DOCX
soffice --headless --convert-to docx document.odt

# ODT to PDF
soffice --headless --convert-to pdf document.odt

# DOCX to ODT
soffice --headless --convert-to odt document.docx

# Batch convert
for file in *.odt; do
    soffice --headless --convert-to pdf "$file"
done

import subprocess
import tempfile
from pathlib import Path

def generate_from_template(template_path, variables, output_path):
    with tempfile.TemporaryDirectory() as tmpdir:
        subprocess.run(['unzip', '-q', template_path, '-d', tmpdir])
        content_file = Path(tmpdir) / 'content.xml'
        content = content_file.read_text()
        for key, value in variables.items():
            content = content.replace(f'${{{key}}}', str(value))
        content_file.write_text(content)
        subprocess.run(['zip', '-rq', output_path, '.'], cwd=tmpdir)
    return output_path

soffice --headless
soffice --headless --convert-to <format> <file>
soffice --writer    # Writer
soffice --calc      # Calc
soffice --impress   # Impress
soffice --draw      # Draw

pip install odfpy     # ODF manipulation
pip install ezodf     # Easier ODF handling