BUG: RangeIndex has zero length after subtraction from constant value · Issue #53255 · pandas-dev/pandas (original) (raw)

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ValueError                                Traceback (most recent call last)
Input In [26], in <cell line: 2>()
      1 s = pd.Series([0,1,2,3])
----> 2 s.index = s.index.max() - s.index

File /opt/conda/envs/bk3/lib/python3.9/site-packages/pandas/core/generic.py:6002, in NDFrame.__setattr__(self, name, value)
   6000 try:
   6001     object.__getattribute__(self, name)
-> 6002     return object.__setattr__(self, name, value)
   6003 except AttributeError:
   6004     pass

File /opt/conda/envs/bk3/lib/python3.9/site-packages/pandas/_libs/properties.pyx:69, in pandas._libs.properties.AxisProperty.__set__()

File /opt/conda/envs/bk3/lib/python3.9/site-packages/pandas/core/generic.py:730, in NDFrame._set_axis(self, axis, labels)
    725 """
    726 This is called from the cython code when we set the `index` attribute
    727 directly, e.g. `series.index = [1, 2, 3]`.
    728 """
    729 labels = ensure_index(labels)
--> 730 self._mgr.set_axis(axis, labels)
    731 self._clear_item_cache()

File /opt/conda/envs/bk3/lib/python3.9/site-packages/pandas/core/internals/managers.py:225, in BaseBlockManager.set_axis(self, axis, new_labels)
    223 def set_axis(self, axis: AxisInt, new_labels: Index) -> None:
    224     # Caller is responsible for ensuring we have an Index object.
--> 225     self._validate_set_axis(axis, new_labels)
    226     self.axes[axis] = new_labels

File /opt/conda/envs/bk3/lib/python3.9/site-packages/pandas/core/internals/base.py:70, in DataManager._validate_set_axis(self, axis, new_labels)
     67     pass
     69 elif new_len != old_len:
---> 70     raise ValueError(
     71         f"Length mismatch: Expected axis has {old_len} elements, new "
     72         f"values have {new_len} elements"
     73     )

ValueError: Length mismatch: Expected axis has 4 elements, new values have 0 elements