> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# atoti.Column.isin()

#### Column.isin(\*elements: ConstantT\_co) → MembershipCondition\[ColumnIdentifier, 'IN', TypeVar] | RelationalCondition\[ColumnIdentifier, 'EQ', TypeVar]

#### Column.isin(\*elements: ConstantT\_co | [None](https://docs.python.org/3/library/constants.html#None)) → MembershipCondition\[TypeAliasForwardRef, 'IN', TypeVar | NoneType] | RelationalCondition\[TypeAliasForwardRef, 'EQ', TypeVar | NoneType]

Return a condition evaluating to `True` for elements of this column included in the given *elements*, and evaluating to `False` elsewhere.

* **Parameters:**
  **elements** – One or more values that the column elements will be compared against.

### Example

```pycon theme={"languages":{"custom":["/engine/python-sdk/0.9/languages/pycon.tmLanguage.json"]}}
>>> df = pd.DataFrame(
...     columns=["City", "Price"],
...     data=[
...         ("Berlin", 150),
...         ("London", 270),
...         ("Madrid", 200),
...     ],
... )
>>> table = session.read_pandas(df, keys={"City"}, table_name="Example")
>>> condition = table["City"].isin("Berlin", "Madrid")
>>> condition
t['Example']['City'].isin('Berlin', 'Madrid')
>>> table.drop(condition)
>>> table.head().sort_index()
        Price
City
London    270
```