How to use databand - 10 common examples

def test_params_parse(self):
        class TParseTask(TTask):
            bool_param = parameter[bool]
            int_param = parameter[int]
            float_param = parameters.FloatParameter()
            date_param = parameter[date]
            timedelta_param = parameters.TimeDeltaParameter()

            def run(self):
                assert isinstance(self.float_param, float)
                super(TParseTask, self).run()

        target = TParseTask(
            bool_param="yes",
            int_param="666",
            float_param="123.456",
            date_param="2018-11-10",
            timedelta_param="44d",
        )
        assert_run_task(target)

dbnd.parameter,
            dbnd.data,
            databand.task,
            tasks.DataSourceTask,
            tasks.PipelineTask,
            targets.Target,
            targets.DataTarget,
            dbnd._core.task_build.task_namespace.namespace,
            parameters.Parameter,
            parameters.DateHourParameter,
            parameters.DateMinuteParameter,
            parameters.DateSecondParameter,
            parameters.DateParameter,
            parameters.MonthParameter,
            parameters.YearParameter,
            parameters.DateIntervalParameter,
            parameters.TimeDeltaParameter,
            parameters.IntParameter,
            parameters.FloatParameter,
            parameters.BoolParameter,
        ]
        assert len(expected) > 0

def test_parse(self):
        ds = parameters.DateSecondParameter()._p.parse_from_str("2013-02-01T184227")
        assert ds == datetime.datetime(2013, 2, 1, 18, 42, 27, tzinfo=utc)

import logging

from datetime import date, timedelta
from typing import Dict

import pandas as pd

from databand import parameters
from dbnd import PipelineTask, output, parameter, task
from dbnd.testing.helpers_pytest import assert_run_task
from dbnd_test_scenarios.test_common.task.factories import TTask


class DummyTask(TTask):
    float_param = parameters.FloatParameter()
    expected_param = parameters.FloatParameter()

    timedelta_param = parameters.TimeDeltaParameter()
    expected_timedelta_param = parameters.TimeDeltaParameter()

    def run(self):
        assert isinstance(self.float_param, float)
        assert isinstance(self.timedelta_param, timedelta)
        assert self.float_param == self.expected_param
        assert self.timedelta_param == self.expected_timedelta_param
        super(DummyTask, self).run()


class DummyWrapper(PipelineTask):
    defaults = {DummyTask.float_param: "0.1", DummyTask.timedelta_param: "4d"}
    output = output

def test_parse(self):
        d = parameters.DictParameter()._p.parse_from_str(
            json.dumps(TestDictParameter._dict)
        )
        assert d == TestDictParameter._dict

def test_serialize(self):
        dh = parameters.DateHourParameter()._p.to_str(
            datetime.datetime(2013, 2, 1, 18, 0, 0)
        )
        assert dh == "2013-02-01T18"

def test_params_parse(self):
        class TParseTask(TTask):
            bool_param = parameter[bool]
            int_param = parameter[int]
            float_param = parameters.FloatParameter()
            date_param = parameter[date]
            timedelta_param = parameters.TimeDeltaParameter()

            def run(self):
                assert isinstance(self.float_param, float)
                super(TParseTask, self).run()

        target = TParseTask(
            bool_param="yes",
            int_param="666",
            float_param="123.456",
            date_param="2018-11-10",
            timedelta_param="44d",
        )
        assert_run_task(target)

from dbnd import parameter
from dbnd._core.utils.timezone import utc
from dbnd.testing.helpers import build_task
from dbnd_test_scenarios.test_common.task.factories import TTask


class DateTask(TTask):
    day = parameter[datetime.date]


class DateHourTask(TTask):
    dh = parameters.DateHourParameter()


class DateMinuteTask(TTask):
    dm = parameters.DateMinuteParameter()


class DateSecondTask(TTask):
    ds = parameters.DateSecondParameter()


class MonthTask(TTask):
    month = MonthParameter()


class YearTask(TTask):
    year = YearParameter()


class TestDateParameter(object):
    def test_parse(self):

from typing import Dict

import pandas as pd

from databand import parameters
from dbnd import PipelineTask, output, parameter, task
from dbnd.testing.helpers_pytest import assert_run_task
from dbnd_test_scenarios.test_common.task.factories import TTask


class DummyTask(TTask):
    float_param = parameters.FloatParameter()
    expected_param = parameters.FloatParameter()

    timedelta_param = parameters.TimeDeltaParameter()
    expected_timedelta_param = parameters.TimeDeltaParameter()

    def run(self):
        assert isinstance(self.float_param, float)
        assert isinstance(self.timedelta_param, timedelta)
        assert self.float_param == self.expected_param
        assert self.timedelta_param == self.expected_timedelta_param
        super(DummyTask, self).run()


class DummyWrapper(PipelineTask):
    defaults = {DummyTask.float_param: "0.1", DummyTask.timedelta_param: "4d"}
    output = output

    def band(self):
        self.output = DummyTask().t_output

import targets

        # These should exist (if not, this will cause AttributeErrors)
        expected = [
            dbnd.Config,
            dbnd.Task,
            dbnd.output,
            dbnd.parameter,
            dbnd.data,
            databand.task,
            tasks.DataSourceTask,
            tasks.PipelineTask,
            targets.Target,
            targets.DataTarget,
            dbnd._core.task_build.task_namespace.namespace,
            parameters.Parameter,
            parameters.DateHourParameter,
            parameters.DateMinuteParameter,
            parameters.DateSecondParameter,
            parameters.DateParameter,
            parameters.MonthParameter,
            parameters.YearParameter,
            parameters.DateIntervalParameter,
            parameters.TimeDeltaParameter,
            parameters.IntParameter,
            parameters.FloatParameter,
            parameters.BoolParameter,
        ]
        assert len(expected) > 0