Python Pandas - 设置要排序的 CategoricalIndex 的类别

要设置要排序的CategoricalIndex的类别，请使用as_ordered()Pandas中的方法。

首先，导入所需的库-

import pandas as pd

使用“categories”参数设置分类的类别-

catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"])

获取类别-

print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories)

设置要订购的类别-

print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())

示例

以下是代码-

import pandas as pd # Set the categories for the categorical using the "categories" parameter catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"]) #显示分类索引 print("CategoricalIndex...\n",catIndex) #获取类别 print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories) #设置要排序的类别 print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())输出结果

这将产生以下输出-

CategoricalIndex... CategoricalIndex([p, q, r, s, p, q, r, s], categories=[p, q, r, s], ordered=False, dtype=category) Displaying Categories from CategoricalIndex... Index([p, q, r, s], dtype=object) CategoricalIndex ordered... CategoricalIndex([p, q, r, s, p, q, r, s], categories=[p, q, r, s], ordered=True, dtype=category)