Auto HTML Linebreak filter

def autolinebreaks(value, autoescape=None):
    """
    Checks if the content is html or plain text if plain text 
    replaces line breaks with appropriate HTML; a single
    newline becomes an HTML line break (``<br />``) and a new line
    followed by a blank line becomes a paragraph break (``</p>``).
    """
    import re
    html_match = re.compile('<br>|<br />|<p>|<table>', re.IGNORECASE)
    if not html_match.search(value):
        from django.utils.html import linebreaks
        autoescape = autoescape and not isinstance(value, SafeData)
        return mark_safe(linebreaks(value, autoescape))
    else:
        return value
autolinebreaks.is_safe = True
autolinebreaks.needs_autoescape = True
autolinebreaks = stringfilter(autolinebreaks)
register.filter(autolinebreaks)