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Use an explicit skip list for columns ignored during auto-grouping #1053

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Merged
has2k1 merged 1 commit into from
Apr 18, 2026
Merged

Use an explicit skip list for columns ignored during auto-grouping #1053

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9 changes: 7 additions & 2 deletions plotnine/layer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@
from ._utils import array_kind, check_required_aesthetics, ninteraction
from ._utils.registry import Registry
from .exceptions import PlotnineError
from .mapping.aes import NO_GROUP, SCALED_AESTHETICS, aes, make_labels
from .mapping.aes import NO_GROUP, aes, make_labels
from .mapping.evaluation import evaluate, stage

if typing.TYPE_CHECKING:
Expand Down Expand Up @@ -577,7 +577,12 @@ def add_group(data: pd.DataFrame) -> pd.DataFrame:
return data

if "group" not in data:
ignore = data.columns.difference(list(SCALED_AESTHETICS))
# Exclude some "special" aesthetics from contributing towards
# the grouping.
# label - geom_text, geom_label
# geometry - geom_map
# where - geom_ribbon
ignore = ["PANEL", "label", "geometry", "where"]
disc = discrete_columns(data, ignore=ignore)
if disc:
data["group"] = ninteraction(data[disc], drop=True)
Expand Down
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