def METHOD_NAME(self, s):
    """
    Given string s, will replace the symbols appearing as keys in
    self.symbol_ludict with their corresponding entries.
    """
    for k, v in self.symbol_ludict.items():
        s = s.replace(k, v)
    if s == '0':
        s = '0.0e0'
    # Replace all double precision literals with custom real type
    # literals
    # constant type specifier
    const_spec = "_rt"
    # we want append any "e" scientific notation with "_rt".  This
    # matches stuff like -1.25d-10, and gives us separate groups
    # for the prefix and exponent.  The [^\w] makes sure a letter
    # isn't right in front of the match (like
    # 'k3d-1'). Alternately, we allow for a match at the start of
    # the string.
    e_re = re.compile(r"([^\w\+\-]|\A)([\+\-0-9.][0-9.]+)[eE]([\+\-]?[0-9]+)", re.IGNORECASE | re.DOTALL)
    # update "d" scientific notation -- allow for multiple
    # constants in a single string
    for ee in e_re.finditer(s):
        old_num = ee.group(0).strip()
        s = s.replace(old_num, f"{old_num}{const_spec}")
    return s