def __eq__(self, other):
"""
@return: true if this C{CFGProduction} is equal to C{other}.
@rtype: C{boolean}
"""
return (_classeq(self, other) and
self._lhs == other._lhs and
self._rhs == other._rhs)
def __eq__(self, other):
"""
@return: True if this non-terminal is equal to C{other}. In
particular, return true iff C{other} is a C{Nonterminal}
and this non-terminal's symbol is equal to C{other}'s
symbol.
@rtype: C{boolean}
"""
return (self is other or _classeq(self, other) and
self._symbol == other._symbol)
def __eq__(self, other):
return (_classeq(self, other) and
self._lhs == other._lhs and
self._rhs == other._rhs and
self.prob() == other.prob())
def __cmp__(self, other):
if not _classeq(self, other): return -1
return cmp((self._lhs, self._rhs), (other._lhs, other._rhs))
