(m)
unescape single escape seq.
unescape single escape seq.
unescape single escape seq .
def _sub_unescape_c(m):
    """unescape single escape seq."""
    v = m.group(1)
    if (len(v) == 1) and (v < '0' or v > '7'):
        try:
            return _esc_map[v]
        except KeyError:
            return v
    else:
        return chr(int(v, 8))
def _sub_unescape_c ( m ) : v = m . group ( 1 ) if ( len ( v ) == 1 ) and ( v < '0' or v > '7' ) : try : return _esc_map [ v ] except KeyError : return v else : return chr ( int ( v , 8 ) )