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Adapt exception handling logic in CFTimeIndex.__sub__ and __rsub__ #5006

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merged 1 commit into from
Mar 7, 2021
Merged

Adapt exception handling logic in CFTimeIndex.__sub__ and __rsub__ #5006

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10 changes: 8 additions & 2 deletions xarray/coding/cftimeindex.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,12 @@
REPR_ELLIPSIS_SHOW_ITEMS_FRONT_END = 10


if LooseVersion(pd.__version__) > LooseVersion("1.2.3"):
OUT_OF_BOUNDS_TIMEDELTA_ERROR = pd.errors.OutOfBoundsTimedelta
else:
OUT_OF_BOUNDS_TIMEDELTA_ERROR = OverflowError


def named(name, pattern):
return "(?P<" + name + ">" + pattern + ")"

Expand Down Expand Up @@ -562,7 +568,7 @@ def __sub__(self, other):
elif _contains_cftime_datetimes(np.array(other)):
try:
return pd.TimedeltaIndex(np.array(self) - np.array(other))
except OverflowError:
except OUT_OF_BOUNDS_TIMEDELTA_ERROR:
raise ValueError(
"The time difference exceeds the range of values "
"that can be expressed at the nanosecond resolution."
Expand All @@ -573,7 +579,7 @@ def __sub__(self, other):
def __rsub__(self, other):
try:
return pd.TimedeltaIndex(other - np.array(self))
except OverflowError:
except OUT_OF_BOUNDS_TIMEDELTA_ERROR:
raise ValueError(
"The time difference exceeds the range of values "
"that can be expressed at the nanosecond resolution."
Expand Down