File: optional.py

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magicgui 0.9.1-2
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"""# Optional user choice

Optional user input using a dropdown selection widget.
"""

from typing import Optional

from magicgui import magicgui


# Using optional will add a '----' to the combobox, which returns "None"
@magicgui(path={"choices": ["a", "b"]})
def f(path: Optional[str] = None):
    """Öptional user input function."""
    print(path, type(path))


f.show(run=True)