text: #!/usr/bin/env python3
  # Copyright 2019 Google LLC
  #
  # 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.
  """This is a simple toy example demonstrating how to use preemptible computing resources."""
  
  from kfp import dsl
  from kfp import gcp
  
  
  class FlipCoinOp(dsl.ContainerOp):
    """Flip a coin and output heads or tails randomly."""
  
    def __init__(self):
      super(FlipCoinOp, self).__init__(
          name='Flip',
          image='python:alpine3.6',
          command=['sh', '-c'],
          arguments=[
              'python -c "import random; result = \'heads\' if random.randint(0,1) == 0 '
              'else \'tails\'; print(result)" | tee /tmp/output'
          ],
          file_outputs={'output': '/tmp/output'})
  
  
  @dsl.pipeline(
      name='pipeline flip coin', description='shows how to use dsl.Condition.')
  def flipcoin():
    flip = FlipCoinOp().apply(gcp.use_preemptible_nodepool()).set_gpu_limit(
        1, 'nvidia').set_retry(5)
  
  
  if __name__ == '__main__':
    import kfp.compiler as compiler
    compiler.Compiler().compile(flipcoin, __file__ + '.yaml')
  