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How to use test_optional_column method in pandera

Best Python code snippet using pandera_python

test_column_mapper.py

Source:test_column_mapper.py

...44    def test_set_tag_columns(self):45        mapper = ColumnMapper()46        mapper.set_tag_columns(self.one_based_tag_columns, finalize_mapping=True)47        self.assertTrue(len(mapper._final_column_map) >= 2)48    def test_optional_column(self):49        mapper = ColumnMapper()50        mapper.set_tag_columns(tag_columns=["HED"])51        mapper.set_column_map({1: "HED"})52        self.assertTrue(len(mapper._final_column_map) == 1)53        mapper = ColumnMapper()54        mapper.set_tag_columns(optional_tag_columns=["HED"])55        mapper.set_column_map({1: "HED"})56        self.assertTrue(len(mapper._final_column_map) == 1)57        mapper = ColumnMapper()58        mapper.set_tag_columns(tag_columns=["HED"])59        self.assertTrue(len(mapper._final_column_map) == 0)60        self.assertTrue(len(mapper._finalize_mapping_issues) == 1)61        mapper = ColumnMapper()62        mapper.set_tag_columns(optional_tag_columns=["HED"])...

datasource.py

Source:datasource.py

...149        ds = Datasource.as_datasource(model=SimpleDemoModel,150                                      columns=[BooleanColumn('boolean')])151        self.assertSequenceEqual([c.title for c in ds.columns], ['Boolean'])152        self.assertSequenceEqual(ds, [(True,), (True,)])153    def test_optional_column(self):154        G(DemoOptionalModel, n=2, name='abc', user=G(User, n=1, first_name='user1'))155        ds = Datasource.as_datasource(model=DemoOptionalModel,156                                      columns=[Column('name'), OptionalColumn('user.first_name')])157        self.assertSequenceEqual([c.title for c in ds.columns], ['name', 'first name'])158        self.assertSequenceEqual(ds, [('abc', 'user1',), ('abc', 'user1')])159    def test_optional_column_optional(self):160        G(DemoOptionalModel, n=2, name='abc', user=None)161        ds = Datasource.as_datasource(model=DemoOptionalModel,162                                      columns=[Column('name'), OptionalColumn('user.first_name')])163        self.assertSequenceEqual([c.title for c in ds.columns], ['name', 'first name'])...

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