Python Pandas CategoricalIndex - 获取该分类的分类代码

要获取此分类的分类代码，请使用Pandas中CategoricalIndex的代码属性。首先，导入所需的库-

import pandas as pd

CategoricalIndex只能采用有限且通常是固定数量的可能值（类别）。使用“categories”参数设置分类的类别。使用“有序”参数将分类视为有序。代码是一个整数数组，它们是类别数组中实际值的位置-

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

显示分类索引-

print("Categorical Index...\n",catIndex)

获取类别代码-

print("\nCategory codes from CategoricalIndex...\n",catIndex.codes)

示例

以下是代码-

import pandas as pd #CategoricalIndex只能采用有限且通常是固定数量的可能值 # Set the categories for the categorical using the "categories" parameter # Treat the categorical as ordered using the "ordered" parameter #代码是一个整数数组，它们是类别数组中实际值的位置。 catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], ordered=True, categories=["p", "q", "r", "s"]) #显示分类索引 print("Categorical Index...\n",catIndex) #获取类别 print("\nDisplayingCategories from CategoricalIndex...\n",catIndex.categories) #获取类别代码 print("\nCategory codes from CategoricalIndex...\n",catIndex.codes)输出结果

这将产生以下输出-

Categorical Index... CategoricalIndex([p, q, r, s, p, q, r, s], categories=[p, q, r, s], ordered=True, dtype=category) DisplayingCategories from CategoricalIndex... Index([p, q, r, s], dtype=object) Category codes from CategoricalIndex... [0 1 2 3 0 1 2 3]