pandas.errors.UnsortedIndexError

异常 pandas.errors。UnsortedIndexError

对尚未进行词法排序的 MultiIndex 进行切片时引发错误。

KeyError的子类。

例子

>>> df = pd.DataFrame({"cat": [0, 0, 1, 1],
...                    "color": ["white", "white", "brown", "black"],
...                    "lives": [4, 4, 3, 7]},
...                   )
>>> df = df.set_index(["cat", "color"])
>>> df
            lives
cat  color
0    white    4
     white    4
1    brown    3
     black    7
>>> df.loc[(0, "black"):(1, "white")]
Traceback (most recent call last):
UnsortedIndexError: 'Key length (2) was greater
than MultiIndex lexsort depth (1)'