def test_selection_to_dict():
brush = alt.selection(type='interval')
# test some value selections
# Note: X and Y cannot have conditions
alt.Chart('path/to/data.json').mark_point().encode(
color=alt.condition(brush, alt.ColorValue('red'), alt.ColorValue('blue')),
opacity=alt.condition(brush, alt.value(0.5), alt.value(1.0)),
text=alt.condition(brush, alt.TextValue('foo'), alt.value('bar'))
).to_dict()
# test some field selections
# Note: X and Y cannot have conditions
# Conditions cannot both be fields
alt.Chart('path/to/data.json').mark_point().encode(
color=alt.condition(brush, alt.Color('col1:N'), alt.value('blue')),
opacity=alt.condition(brush, 'col1:N', alt.value(0.5)),
text=alt.condition(brush, alt.value('abc'), alt.Text('col2:N')),
size=alt.condition(brush, alt.value(20), 'col2:N')
).to_dict()
def test_selection_to_dict():
brush = alt.selection(type="interval")
# test some value selections
# Note: X and Y cannot have conditions
alt.Chart("path/to/data.json").mark_point().encode(
color=alt.condition(brush, alt.ColorValue("red"), alt.ColorValue("blue")),
opacity=alt.condition(brush, alt.value(0.5), alt.value(1.0)),
text=alt.condition(brush, alt.TextValue("foo"), alt.value("bar")),
).to_dict()
# test some field selections
# Note: X and Y cannot have conditions
# Conditions cannot both be fields
alt.Chart("path/to/data.json").mark_point().encode(
color=alt.condition(brush, alt.Color("col1:N"), alt.value("blue")),
opacity=alt.condition(brush, "col1:N", alt.value(0.5)),
text=alt.condition(brush, alt.value("abc"), alt.Text("col2:N")),
size=alt.condition(brush, alt.value(20), "col2:N"),
).to_dict()