github.com/apache/beam/sdks/v2@v2.48.2/python/apache_beam/examples/snippets/transforms/elementwise/tostring.py (about)

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    10  #    http://www.apache.org/licenses/LICENSE-2.0
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    12  # Unless required by applicable law or agreed to in writing, software
    13  # distributed under the License is distributed on an "AS IS" BASIS,
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    15  # See the License for the specific language governing permissions and
    16  # limitations under the License.
    17  #
    18  
    19  # pytype: skip-file
    20  
    21  
    22  def tostring_kvs(test=None):
    23    # [START tostring_kvs]
    24    import apache_beam as beam
    25  
    26    with beam.Pipeline() as pipeline:
    27      plants = (
    28          pipeline
    29          | 'Garden plants' >> beam.Create([
    30              ('🍓', 'Strawberry'),
    31              ('🥕', 'Carrot'),
    32              ('🍆', 'Eggplant'),
    33              ('🍅', 'Tomato'),
    34              ('🥔', 'Potato'),
    35          ])
    36          | 'To string' >> beam.ToString.Kvs()
    37          | beam.Map(print))
    38      # [END tostring_kvs]
    39      if test:
    40        test(plants)
    41  
    42  
    43  def tostring_element(test=None):
    44    # [START tostring_element]
    45    import apache_beam as beam
    46  
    47    with beam.Pipeline() as pipeline:
    48      plant_lists = (
    49          pipeline
    50          | 'Garden plants' >> beam.Create([
    51              ['🍓', 'Strawberry', 'perennial'],
    52              ['🥕', 'Carrot', 'biennial'],
    53              ['🍆', 'Eggplant', 'perennial'],
    54              ['🍅', 'Tomato', 'annual'],
    55              ['🥔', 'Potato', 'perennial'],
    56          ])
    57          | 'To string' >> beam.ToString.Element()
    58          | beam.Map(print))
    59      # [END tostring_element]
    60      if test:
    61        test(plant_lists)
    62  
    63  
    64  def tostring_iterables(test=None):
    65    # [START tostring_iterables]
    66    import apache_beam as beam
    67  
    68    with beam.Pipeline() as pipeline:
    69      plants_csv = (
    70          pipeline
    71          | 'Garden plants' >> beam.Create([
    72              ['🍓', 'Strawberry', 'perennial'],
    73              ['🥕', 'Carrot', 'biennial'],
    74              ['🍆', 'Eggplant', 'perennial'],
    75              ['🍅', 'Tomato', 'annual'],
    76              ['🥔', 'Potato', 'perennial'],
    77          ])
    78          | 'To string' >> beam.ToString.Iterables()
    79          | beam.Map(print))
    80      # [END tostring_iterables]
    81      if test:
    82        test(plants_csv)