DataFrame 新增新列

import pandas as pd

# 创建示例 DataFrame
data = {
    'A': [1, 2, 3],
    'B': ['a', 'b', 'c']
}
df = pd.DataFrame(data)

# 增加新列 'C'
new_data = [10, 20, 30]
df['C'] = new_data

print(df)