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]