def wrap(s, prefix=r'\b', suffix=r'\b', grouper='()'):
    r"""Wrap a string (tyically a regex) with a prefix and suffix (usually a nonconuming word break)
    Arguments:
      prefix, suffix (str): strings to append to the front and back of the provided string
      grouper (2-len str or 2-tuple): characters or strings to separate prefix and suffix from the middle
    >>> wrap(r'\w*')
    '\\b(\\w*)\\b'
    >>> wrap(r'middle', prefix=None)
    '(middle)\\b'
    """
    return ((prefix or '') + try_get(grouper, 0, '') + (s or '') +
            try_get(grouper, 1, try_get(grouper, 0, '')) + (suffix or ''))