mem0/embedchain/utils.py

import re


def clean_string(text):
    """
    This function takes in a string and performs a series of text cleaning operations. 

    Args:
        text (str): The text to be cleaned. This is expected to be a string.

    Returns:
        cleaned_text (str): The cleaned text after all the cleaning operations have been performed.
    """
    # Replacement of newline characters:
    text = text.replace('\n', ' ')
    
    # Stripping and reducing multiple spaces to single:
    cleaned_text = re.sub(r'\s+', ' ', text.strip())
    
    # Removing backslashes:
    cleaned_text = cleaned_text.replace('\\', '')
    
    # Replacing hash characters:
    cleaned_text = cleaned_text.replace('#', ' ')
    
    # Eliminating consecutive non-alphanumeric characters:
    # This regex identifies consecutive non-alphanumeric characters (i.e., not a word character [a-zA-Z0-9_] and not a whitespace) in the string 
    # and replaces each group of such characters with a single occurrence of that character. 
    # For example, "!!! hello !!!" would become "! hello !".
    cleaned_text = re.sub(r'([^\w\s])\1*', r'\1', cleaned_text)
    
    return cleaned_text