Python Pandas - 返回索引中的唯一值
若要返回索引中的唯一值,请在 Pandas 中使用index.unique() 方法。首先,导入必需的库 -
import pandas as pd
创建 Pandas 索引 -
index = pd.Index([10, 50, 70, 10, 90, 50, 10, 30])
显示 Pandas 索引 -
print("Pandas Index...\n",index)从索引中获取唯一值。唯一值按出现顺序返回,这不进行排序 -
index.unique()
示例
以下是代码 -
import pandas as pd
# Creating Pandas index
index = pd.Index([10, 50, 70, 10, 90, 50, 10, 30])
# Display the Pandas index
print("Pandas Index...\n",index)
# Return the number of elements in the Index
print("\nNumber of elements in the index...\n",index.size)
# Return the dtype of the data
print("\nThe dtype object...\n",index.dtype)
# get the unique values from the index
# Unique values are returned in order of appearance, this does NOT sort
print("\nUnique values from the Index..\n", index.unique())输出
将生成以下输出 -
Pandas Index... Int64Index([10, 50, 70, 10, 90, 50, 10, 30], dtype='int64') Number of elements in the index... 8 The dtype object... int64 Unique values from the Index.. Int64Index([10, 50, 70, 90, 30], dtype='int64')
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