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⚡️ Speed up function label_from_attrs by 1,093% #60

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⚡️ Speed up function label_from_attrs by 1,093% #60

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5 changes: 3 additions & 2 deletions xarray/plot/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@
from xarray.core.utils import is_scalar, module_available
from xarray.namedarray.pycompat import DuckArrayModule

_pint_array_type = None

nc_time_axis_available = module_available("nc_time_axis")


Expand Down Expand Up @@ -499,9 +501,8 @@ def _maybe_gca(**subplot_kws: Any) -> Axes:

def _get_units_from_attrs(da: DataArray) -> str:
"""Extracts and formats the unit/units from a attributes."""
pint_array_type = DuckArrayModule("pint").type
units = " [{}]"
if isinstance(da.data, pint_array_type):
if _pint_array_type is not None and isinstance(da.data, _pint_array_type):
return units.format(str(da.data.units))
if "units" in da.attrs:
return units.format(da.attrs["units"])
Expand Down