- +在此添加单个AI新笔记
pandas选择数据df[] df[选择指定列]
![选择数据 - df[] - df[选择指定列]](/_next/image?url=https%3A%2F%2Fbookchips.com%2Fchips%2F6850eb130b9569655f1202b4%2F%E9%80%89%E6%8B%A9%E6%95%B0%E6%8D%AE-df%5B%5D-df%5B%E9%80%89%E6%8B%A9%E6%8C%87%E5%AE%9A%E5%88%97%5D.png&w=3840&q=85)
作用：显示什么列
import numpy as npimport pandas as pddf = pd.DataFrame(data=[{"A":"1", "B":"3", "C":"4"}, {"A":"3", "B":"2", "C":"5"}, {"A":"2", "B":"1", "C":"6"}])df = pd.DataFrame(data=[{"A":1, "B":3, "C":4}, {"A":3, "B":2, "C":5}, {"A":2, "B":1, "C":6}])
| A | B | C | |
|---|---|---|---|
| 0 | 1 | 3 | 4 |
| 1 | 3 | 2 | 5 |
| 2 | 2 | 1 | 6 |
指定列df[‘A’,’B’,’C’,’D’]
print(df['B'])
| 0 | 3 |
| 1 | 2 |
| 2 | 1 |
Name: B, dtype: int64
![指定列df['A','B','C','D']](/uploadimg/python3.X-数据分析-Pandas/20241016112528.png "指定列df['A','B','C','D']")
df[['B','C']]
| B | C | |
|---|---|---|
| 0 | 3 | 4 |
| 1 | 2 | 5 |
| 2 | 1 | 6 |
![指定多列df['A','B','C','D']](/uploadimg/python3.X-数据分析-Pandas/20241016112618.png "指定多列df['A','B','C','D']")