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Provide shape info in shape mismatch error. #3619

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Dec 13, 2019
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5 changes: 4 additions & 1 deletion xarray/core/variable.py
Original file line number Diff line number Diff line change
Expand Up @@ -346,7 +346,10 @@ def data(self):
def data(self, data):
data = as_compatible_data(data)
if data.shape != self.shape:
raise ValueError("replacement data must match the Variable's shape")
raise ValueError(
f"replacement data must match the Variable's shape. "
f"replacement data has shape {data.shape}; Variable has shape {self.shape}"
)
self._data = data

def load(self, **kwargs):
Expand Down