Best Python code snippet using molecule_python
expressions.py
Source: expressions.py
...19 def __init__(self, children=None, connector=None, negated=False):20 if children is not None and len(children) > 1 and connector is None:21 raise TypeError('You have to specify a connector.')22 super(ExpressionNode, self).__init__(children, connector, negated)23 def _combine(self, other, connector, reversed, node=None):24 if reversed:25 obj = ExpressionNode([other], connector)26 obj.add(node or self, connector)27 else:28 obj = node or ExpressionNode([self], connector)29 obj.add(other, connector)30 return obj31 ###################32 # VISITOR METHODS #33 ###################34 def prepare(self, evaluator, query, allow_joins):35 return evaluator.prepare_node(self, query, allow_joins)36 def evaluate(self, evaluator, qn, connection):37 return evaluator.evaluate_node(self, qn, connection)38 #############39 # OPERATORS #40 #############41 def __add__(self, other):42 return self._combine(other, self.ADD, False)43 def __sub__(self, other):44 return self._combine(other, self.SUB, False)45 def __mul__(self, other):46 return self._combine(other, self.MUL, False)47 def __div__(self, other):48 return self._combine(other, self.DIV, False)49 def __mod__(self, other):50 return self._combine(other, self.MOD, False)51 def __and__(self, other):52 return self._combine(other, self.AND, False)53 def __or__(self, other):54 return self._combine(other, self.OR, False)55 def __radd__(self, other):56 return self._combine(other, self.ADD, True)57 def __rsub__(self, other):58 return self._combine(other, self.SUB, True)59 def __rmul__(self, other):60 return self._combine(other, self.MUL, True)61 def __rdiv__(self, other):62 return self._combine(other, self.DIV, True)63 def __rmod__(self, other):64 return self._combine(other, self.MOD, True)65 def __rand__(self, other):66 return self._combine(other, self.AND, True)67 def __ror__(self, other):68 return self._combine(other, self.OR, True)69 def prepare_database_save(self, unused):70 return self71class F(ExpressionNode):72 """73 An expression representing the value of the given field.74 """75 def __init__(self, name):76 super(F, self).__init__(None, None, False)77 self.name = name78 def __deepcopy__(self, memodict):79 obj = super(F, self).__deepcopy__(memodict)80 obj.name = self.name81 return obj82 def prepare(self, evaluator, query, allow_joins):...
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