Chunk Any Piece of Text

import re
from typing import List

def chunk_text(text, chunk_by) -> List[str]:
    """
    Splits the input text into chunks based on the specified granularity (sentences or paragraphs).
    
    Parameters:
    - text: The input text to be chunked.
    - chunk_by: The granularity for chunking ('sentence' or 'paragraph').
    
    Returns:
    - A list of strings, where each string is a chunk of the original text.
    """
    if chunk_by == "sentence":
        sentences = re.split(r'(?<!\d)[.?!](?!\d)', text)
        sentences = [sentence.strip() for sentence in sentences if sentence.strip()]
        return sentences
    elif chunk_by == "paragraph":
        paragraphs = [paragraph.strip() for paragraph in text.split("\n") if paragraph.strip()]
        return paragraphs
    else:
        raise ValueError("Invalid chunk_by value. Choose 'sentence' or 'paragraph'.")