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f9e7197 May 21, 2015
@tommyengstrom @themalkolm @steenzout @Tarrasch
97 lines (73 sloc) 2.77 KB
# -*- coding: utf-8 -*-
#
# Copyright 2012-2015 Spotify AB
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import random as rnd
import time
import luigi
class Config(luigi.Task):
seed = luigi.IntParameter()
def output(self):
"""
Returns the target output for this task.
In this case, a successful execution of this task will create a file on the local filesystem.
:return: the target output for this task.
:rtype: object (:py:class:`luigi.target.Target`)
"""
return luigi.LocalTarget('/tmp/Config_%d.txt' % self.seed)
def run(self):
time.sleep(5)
rnd.seed(self.seed)
result = ','.join(
[str(x) for x in rnd.sample(list(range(300)), rnd.randint(7, 25))])
with self.output().open('w') as f:
f.write(result)
class Data(luigi.Task):
magic_number = luigi.IntParameter()
def output(self):
"""
Returns the target output for this task.
In this case, a successful execution of this task will create a file on the local filesystem.
:return: the target output for this task.
:rtype: object (:py:class:`luigi.target.Target`)
"""
return luigi.LocalTarget('/tmp/Data_%d.txt' % self.magic_number)
def run(self):
time.sleep(1)
with self.output().open('w') as f:
f.write('%s' % self.magic_number)
class Dynamic(luigi.Task):
seed = luigi.IntParameter(default=1)
def output(self):
"""
Returns the target output for this task.
In this case, a successful execution of this task will create a file on the local filesystem.
:return: the target output for this task.
:rtype: object (:py:class:`luigi.target.Target`)
"""
return luigi.LocalTarget('/tmp/Dynamic_%d.txt' % self.seed)
def run(self):
# This could be done using regular requires method
config = self.clone(Config)
yield config
with config.output().open() as f:
data = [int(x) for x in f.read().split(',')]
# ... but not this
data_dependent_deps = [Data(magic_number=x) for x in data]
yield data_dependent_deps
with self.output().open('w') as f:
f.write('Tada!')
if __name__ == '__main__':
luigi.run()