All public modules, classes, methods, and functions must have docstrings that follow PEP 257 formatting standards. This ensures consistent, professional documentation across the codebase.

Required PEP 257 Format:

Examples:

Single-line docstring:

def get_nltk_data_dir() -> str | None:
    """The directory where `nltk` resources are located."""

Multi-line docstring:

def clean_pdfminer_inner_elements(document: "DocumentLayout") -> "DocumentLayout":
    """Move pdfminer elements from inside tables to the extra_info dictionary.

    Each element appears in the `extra_info` dictionary using its table id as the key.
    """

Module docstring:

"""NDJSON file utilities for document processing.

This module provides functionality for reading and writing newline-delimited JSON files.
Used primarily for batch processing of document elements during partitioning workflows.
"""

Coverage Requirements:

This standard improves code discoverability, reduces onboarding time, and maintains professional documentation quality throughout the codebase.