Pandas Modify Column: Step-by-Step Guide

To modify a column of data, you can first extract the data from that column, then make changes to the extracted data, and finally assign the modified data back to the original column.

Here is an example code showing how to use the pandas library to modify a column of data.

import pandas as pd

# 创建一个DataFrame
data = {
    'A': [1, 2, 3, 4],
    'B': [5, 6, 7, 8]
}
df = pd.DataFrame(data)

# 提取列B的数据
column_b = df['B']

# 修改列B的数据
new_column_b = column_b * 2

# 将修改后的数据赋值回原列
df['B'] = new_column_b

print(df)

The output result of running the above code will be:

   A   B
0  1  10
1  2  12
2  3  14
3  4  16

This successfully modified a specific column of the DataFrame.