[Pandas技巧] 字段栏位名筛选与顺序调整

美图欣赏2022/06/16

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1.筛选字段栏位名 

import pandas as pd 
 
df = pd.DataFrame([[1,'FOC','WK10_Q217'],
                   [2,'ACD','WK11_Q217'],
                   [3,'TED','WK12_Q217']
                  ],columns=['Id','Site','Wk_odin'])

# 获取Id和Wk_odin两列
df = df[['Id','Wk_odin']]
# 对'Wk_odin'栏位中的值进行截取修改
df['Wk_odin'] = df['Wk_odin'].apply(lambda x:x[-4:])

df

处理后的df(筛选指定的列)

扩展:对Wk_odin栏位中的值进行截取修改 

# 对'Wk_odin'栏位中的值进行截取修改
df['Wk_odin'] = df['Wk_odin'].apply(lambda x:x[-4:])

结果展示:

2.调整字段栏位名顺序

import pandas as pd 

df = pd.DataFrame([['A','Atest',123],
                   ['B','Btest',456],
                   ['C','Ctest',789]
                  ],columns=['Site','Test','Price'])

# 调整df中'Test'和'Price'两个栏位的顺序
order = ['Site', 'Price', 'Test']
df = df[order]

df

处理后的df