【pandas数据处理】数据结构

Xuannn_n2023-11-24 22:22

Series

一维数组对象，不仅包含数据元素，还包含一组与数据元素对应的行标签。

python 复制代码

import pandas as pd
s = pd.Series(['短裤','毛衣'])
print(s)

python 复制代码

import pandas as pd
s = pd.Series(['短裤','毛衣'], index=['a0001','a0002'])
print(s)

python 复制代码

import pandas as pd
s = pd.Series({'a0001':'短裤','a0002':'毛衣'})
print(s)

python 复制代码

import pandas as pd
df = pd.DataFrame([['短裤',45],['毛衣',56]])
print(df)

通过设置参数columns和index来分别设置行列标签

python 复制代码

import pandas as pd
df = pd.DataFrame([['短裤',45],['毛衣',56]],columns=['产品','单价'],index=['a0001','a0002'])
print(df)

python 复制代码

import pandas as pd
df = pd.DataFrame({'产品':['短裤','毛衣'],'单价':[45,56]},index=['a0001','a0002'])
print(df)