Probe Class Reference

Public Member Functions
def	__init__
def	__deepcopy__
def	__del__ (self)
def	__lt__ (self, other)
def	__gt__ (self, other)
def	__le__ (self, other)
def	__ge__ (self, other)
def	__eq__ (self, other)
def	__ne__ (self, other)
def	__call__ (self, goal)

Data Fields
	ctx
	probe

Detailed Description

Probes are used to inspect a goal (aka problem) and collect information that may be used
to decide which solver and/or preprocessing step will be used.

Definition at line 8718 of file z3py.py.

Constructor & Destructor Documentation

def __init__	(		self,
			probe,
			ctx = None
	)

Definition at line 8723 of file z3py.py.

    def __init__(self, probe, ctx=None):
        self.ctx = _get_ctx(ctx)
        self.probe = None
        if isinstance(probe, ProbeObj):
            self.probe = probe
        elif isinstance(probe, float):
            self.probe = Z3_probe_const(self.ctx.ref(), probe)
        elif _is_int(probe):
            self.probe = Z3_probe_const(self.ctx.ref(), float(probe))
        elif isinstance(probe, bool):
            if probe:
                self.probe = Z3_probe_const(self.ctx.ref(), 1.0)
            else:
                self.probe = Z3_probe_const(self.ctx.ref(), 0.0)
        else:
            if z3_debug():
                _z3_assert(isinstance(probe, str), "probe name expected")
            try:
                self.probe = Z3_mk_probe(self.ctx.ref(), probe)
            except Z3Exception:
                raise Z3Exception("unknown probe '%s'" % probe)
        Z3_probe_inc_ref(self.ctx.ref(), self.probe)

def __del__

(

self

)

Definition at line 8749 of file z3py.py.

    def __del__(self):
        if self.probe is not None and self.ctx.ref() is not None and Z3_probe_dec_ref is not None:
            Z3_probe_dec_ref(self.ctx.ref(), self.probe)

Member Function Documentation

def __call__	(		self,
			goal
	)

Evaluate the probe `self` in the given goal.

>>> p = Probe('size')
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
2.0
>>> g.add(x < 20)
>>> p(g)
3.0
>>> p = Probe('num-consts')
>>> p(g)
1.0
>>> p = Probe('is-propositional')
>>> p(g)
0.0
>>> p = Probe('is-qflia')
>>> p(g)
1.0

Definition at line 8838 of file z3py.py.

    def __call__(self, goal):
        """Evaluate the probe `self` in the given goal.

        >>> p = Probe('size')
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        2.0
        >>> g.add(x < 20)
        >>> p(g)
        3.0
        >>> p = Probe('num-consts')
        >>> p(g)
        1.0
        >>> p = Probe('is-propositional')
        >>> p(g)
        0.0
        >>> p = Probe('is-qflia')
        >>> p(g)
        1.0
        """
        if z3_debug():
            _z3_assert(isinstance(goal, (Goal, BoolRef)), "Z3 Goal or Boolean expression expected")
        goal = _to_goal(goal)
        return Z3_probe_apply(self.ctx.ref(), self.probe, goal.goal)

def __deepcopy__	(		self,
			memo = {}
	)

Definition at line 8746 of file z3py.py.

    def __deepcopy__(self, memo={}):
        return Probe(self.probe, self.ctx)

def __eq__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is equal to the value returned by `other`.

>>> p = Probe('size') == 2
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
1.0

Definition at line 8809 of file z3py.py.

Referenced by Probe.__ne__().

    def __eq__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is equal to the value returned by `other`.

        >>> p = Probe('size') == 2
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        1.0
        """
        return Probe(Z3_probe_eq(self.ctx.ref(), self.probe, _to_probe(other, self.ctx).probe), self.ctx)

def __ge__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is greater than or equal to the value returned by `other`.

>>> p = Probe('size') >= 2
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
1.0

Definition at line 8795 of file z3py.py.

    def __ge__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is greater than or equal to the value returned by `other`.

        >>> p = Probe('size') >= 2
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        1.0
        """
        return Probe(Z3_probe_ge(self.ctx.ref(), self.probe, _to_probe(other, self.ctx).probe), self.ctx)

def __gt__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is greater than the value returned by `other`.

>>> p = Probe('size') > 10
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
0.0

Definition at line 8767 of file z3py.py.

    def __gt__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is greater than the value returned by `other`.

        >>> p = Probe('size') > 10
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        0.0
        """
        return Probe(Z3_probe_gt(self.ctx.ref(), self.probe, _to_probe(other, self.ctx).probe), self.ctx)

def __le__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is less than or equal to the value returned by `other`.

>>> p = Probe('size') <= 2
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
1.0

Definition at line 8781 of file z3py.py.

    def __le__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is less than or equal to the value returned by `other`.

        >>> p = Probe('size') <= 2
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        1.0
        """
        return Probe(Z3_probe_le(self.ctx.ref(), self.probe, _to_probe(other, self.ctx).probe), self.ctx)

def __lt__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is less than the value returned by `other`.

>>> p = Probe('size') < 10
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
1.0

Definition at line 8753 of file z3py.py.

    def __lt__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is less than the value returned by `other`.

        >>> p = Probe('size') < 10
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        1.0
        """
        return Probe(Z3_probe_lt(self.ctx.ref(), self.probe, _to_probe(other, self.ctx).probe), self.ctx)

def __ne__	(		self,
			other
	)

Return a probe that evaluates to "true" when the value returned by `self`
is not equal to the value returned by `other`.

>>> p = Probe('size') != 2
>>> x = Int('x')
>>> g = Goal()
>>> g.add(x > 0)
>>> g.add(x < 10)
>>> p(g)
0.0

Definition at line 8823 of file z3py.py.

    def __ne__(self, other):
        """Return a probe that evaluates to "true" when the value returned by `self`
        is not equal to the value returned by `other`.

        >>> p = Probe('size') != 2
        >>> x = Int('x')
        >>> g = Goal()
        >>> g.add(x > 0)
        >>> g.add(x < 10)
        >>> p(g)
        0.0
        """
        p = self.__eq__(other)
        return Probe(Z3_probe_not(self.ctx.ref(), p.probe), self.ctx)

Field Documentation

ctx

Definition at line 8724 of file z3py.py.

Referenced by Probe.__deepcopy__(), Probe.__eq__(), Probe.__ge__(), Probe.__gt__(), Probe.__le__(), Probe.__lt__(), Probe.__ne__(), and ParserContext.from_string().

probe

Definition at line 8725 of file z3py.py.

Referenced by Probe.__call__(), Probe.__deepcopy__(), Probe.__del__(), Probe.__eq__(), Probe.__ge__(), Probe.__gt__(), Probe.__le__(), and Probe.__lt__().