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--no-skip-false option, plus docs - closes #527
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@ -916,6 +916,8 @@ This will add the new column, if it does not already exist. You can pass ``outpu
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If you want to drop the original column after saving the results in a separate output column, pass ``drop=True``.
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By default any rows with a falsey value for the column - such as ``0`` or ``None`` - will be skipped. Pass ``skip_false=False`` to disable this behaviour.
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You can create multiple new columns from a single input column by passing ``multi=True`` and a conversion function that returns a Python dictionary. This example creates new ``upper`` and ``lower`` columns populated from the single ``title`` column:
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.. code-block:: python
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