Python grammar.Parser類代碼示例

    def test_filtered_parse(self):
        """The Parser can filter a trace"""
        trace = trappy.FTrace()

        prs = Parser(trace, filters={"cdev_state": 3})
        dfr_res = prs.solve("devfreq_out_power:freq")
        self.assertEquals(len(dfr_res), 1)

 def test_exp_ops(self):
     """Test exponentiation: Numeric"""
     parser = Parser(trappy.BareTrace())
     eqn = "3**3 * 2**4"
     self.assertEquals(parser.solve(eqn), 432)
     eqn = "3**(4/2)"
     self.assertEquals(parser.solve(eqn), 9)

    def test_mul_ops(self):
        """Test Mult and Division: Numeric"""

        parser = Parser(trappy.Run())
        eqn = "(10 * 2 / 10)"
        self.assertEquals(parser.solve(eqn), 2)
        eqn = "-2 * 2 + 2 * 10 / 10"
        self.assertEquals(parser.solve(eqn), -2)

    def test_var_forward(self):
        """Test Forwarding: Variable"""

        thermal_zone_id = 0
        pvars = {}
        pvars["control_temp"] = 78000
        parser = Parser(trappy.FTrace(), pvars=pvars)
        eqn = "numpy.mean(trappy.thermal.Thermal:temp) < control_temp"
        self.assertTrue(parser.solve(eqn)[thermal_zone_id])

    def test_single_func_call(self):
        """Test Single Function Call"""

        thermal_zone_id = 0
        parser = Parser(trappy.FTrace())
        eqn = "numpy.mean(trappy.thermal.Thermal:temp)"
        self.assertEquals(
            parser.solve(eqn)[thermal_zone_id],
            np.mean(
                parser.data.thermal.data_frame["temp"]))

    def test_bool_ops_scalar(self):
        """Test Logical Operations: Vector"""

        thermal_zone_id=0
        parser = Parser(trappy.FTrace())
        # The equation returns a boolean scalar
        eqn = "(numpy.mean(trappy.thermal.Thermal:temp) > 65000) && (numpy.mean(trappy.cpu_power.CpuOutPower) > 500)"
        self.assertTrue(parser.solve(eqn)[thermal_zone_id])
        eqn = "(numpy.mean(trappy.thermal.Thermal:temp) > 65000) || (numpy.mean(trappy.cpu_power.CpuOutPower) < 500)"
        self.assertTrue(parser.solve(eqn)[thermal_zone_id])

    def test_bool_ops_vector(self):
        """Test Logical Operations: Vector"""

        thermal_zone_id = 0
        # The equation returns a vector mask
        parser = Parser(trappy.FTrace())
        eqn = "(trappy.thermal.ThermalGovernor:current_temperature > 77000)\
                & (trappy.pid_controller.PIDController:output > 2500)"
        mask = parser.solve(eqn)
        self.assertEquals(len(parser.ref(mask.dropna()[0])), 0)

    def test_funcparams_mul(self):
        """Test Mult and Division: Data"""

        thermal_zone_id = 0
        parser = Parser(trappy.FTrace())
        eqn = "trappy.thermal.Thermal:temp * 10.0"
        series = parser.data.thermal.data_frame["temp"]
        assert_series_equal(parser.solve(eqn)[thermal_zone_id], series * 10.0, check_names=False)
        eqn = "trappy.thermal.Thermal:temp / trappy.thermal.Thermal:temp * 10"
        assert_series_equal(parser.solve(eqn)[thermal_zone_id], series / series * 10, check_names=False)

    def test_func_forward(self):
        """Test Forwarding: Mixed"""

        thermal_zone_id = 0
        pvars = {}
        pvars["mean"] = np.mean
        pvars["control_temp"] = 78000
        parser = Parser(trappy.FTrace(), pvars=pvars)
        eqn = "mean(trappy.thermal.Thermal:temp) < control_temp"
        self.assertTrue(parser.solve(eqn)[thermal_zone_id])

    def test_sum_operator(self):
        """Test Addition And Subtraction: Numeric"""

        parser = Parser(trappy.BareTrace())
        # Simple equation
        eqn = "10 + 2 - 3"
        self.assertEquals(parser.solve(eqn), 9)
        # Equation with bracket and unary ops
        eqn = "(10 + 2) - (-3 + 2)"
        self.assertEquals(parser.solve(eqn), 13)

    def test_parser_with_name(self):
        """Test equation using event name"""

        thermal_zone_id = 0
        parser = Parser(trappy.FTrace())
        # Equation with functions as parameters (Mixed)
        eqn = "numpy.mean(thermal:temp) + 1000"
        self.assertEquals(
            parser.solve(eqn)[thermal_zone_id],
            np.mean(
                parser.data.thermal.data_frame["temp"]) + 1000)

    def test_super_indexing(self):
        "Test if super-indexing works correctly"""

        trace = trappy.FTrace()
        parser = Parser(trace)
        # The first event has less index values
        sol1 = parser.solve("trappy.thermal.Thermal:temp")
        # The second index has more index values
        sol2 = parser.solve("trappy.pid_controller.PIDController:output")
        # Super Indexing should result in len(sol2) > len(sol1)
        self.assertGreater(len(sol2), len(sol1))

    def test_for_parsed_event(self):
        """Test if an added parsed event can be accessed"""

        trace = trappy.FTrace(scope="custom")
        dfr = pandas.DataFrame({"l1_misses": [24, 535,  41],
                                "l2_misses": [155, 11, 200],
                                "cpu":       [ 0,   1,   0]},
                           index=pandas.Series([1.020, 1.342, 1.451], name="Time"))
        trace.add_parsed_event("pmu_counters", dfr)

        p = Parser(trace)
        self.assertTrue(len(p.solve("pmu_counters:cpu")), 3)

class Analyzer(object):

    """
    :param data: TRAPpy Run Object
    :type data: :mod:`trappy.run.Run`

    :param config: A dictionary of variables, classes
        and functions that can be used in the statements
    :type config: dict
    """

    def __init__(self, data, config, topology=None):
        self._parser = Parser(data, config, topology)

    def assertStatement(self, statement, select=None):
        """Solve the statement for a boolean result

        :param statement: A string representing a valid
            :mod:`trappy.stats.grammar` statement
        :type statement: str

        :param select: If the result represents a boolean
            mask and the data was derived from a TRAPpy event
            with a pivot value. The :code:`select` can be
            used to select a particular pivot value
        :type select: :mod:`pandas.DataFrame` column
        """

        result = self.getStatement(statement, select=select)

        # pylint: disable=no-member
        if not (isinstance(result, bool) or isinstance(result, np.bool_)):
            warnings.warn(
                "solution of {} is not an instance of bool".format(statement))
        return result
        # pylint: enable=no-member

    def getStatement(self, statement, reference=False, select=None):
        """Evaluate the statement"""

        result = self._parser.solve(statement)

        # pylint: disable=no-member
        if np.isscalar(result):
            return result
        # pylint: enable=no-member

        if select is not None and len(result):
            result = result[select]
            if reference:
                result = self._parser.ref(result)

        return result

    def test_accessors_sum(self):
        """Test Addition And Subtraction: Data"""

        thermal_zone_id = 0
        parser = Parser(trappy.FTrace())
        # Equation with dataframe accessors
        eqn = "trappy.thermal.Thermal:temp + \
trappy.thermal.Thermal:temp"

        assert_series_equal(
            parser.solve(eqn)[thermal_zone_id],
            2 *
            parser.data.thermal.data_frame["temp"], check_names=False)