Python Pandas - 返回按升序排列的索引对象中唯一值计数的序列

要返回按升序排列的索引对象中唯一值计数的序列，请使用带有参数 ascending 和 True 的 index.value_counts() 方法。

首先，导入所需的库 -

import pandas as pd

创建 Pandas 索引 -

index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 30])

显示 Pandas 索引 -

print("Pandas Index...\n",index)

按升序排列的唯一值计数 -

print("\nGet the count of unique values sorted in ascending order..." "\n",index.value_counts(ascending=True))

示例

以下为代码 -

import pandas as pd

# Creating Pandas index
index = pd.Index([50, 10, 70, 110, 90, 50, 110, 90, 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)

# count of unique values sorted in ascending order
print("\nGet the count of unique values sorted in ascending order..." "\n",index.value_counts(ascending=True))

输出

这将生成以下输出 -

Pandas Index...
Int64Index([50, 10, 70, 110, 90, 50, 110, 90, 30], dtype='int64')

Number of elements in the index...
9

The dtype object...
int64

Get the count of unique values sorted in ascending order...
10   1
70   1
30   1
50   2
110  2
90   2
dtype: int64

更新于: 13-10-2021

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