从pandas数据帧中删除大量列

# 导入pandas库
import pandas as pd

# 创建一个示例数据帧
data = {'A': [1, 2, 3],
        'B': [4, 5, 6],
        'C': [7, 8, 9],
        'D': [10, 11, 12]}
df = pd.DataFrame(data)

# 删除单个列
df = df.drop('A', axis=1)

# 删除多个列
columns_to_drop = ['B', 'C']
df = df.drop(columns_to_drop, axis=1)

# 打印删除列后的数据帧
print(df)

# 导入pandas库
import pandas as pd

# 创建一个示例数据帧
data = {'A': [1, 2, 3],
        'B': [4, 5, 6],
        'C': [7, 8, 9],
        'D': [10, 11, 12]}
df = pd.DataFrame(data)

# 删除单个列
del df['A']

# 删除多个列
columns_to_drop = ['B', 'C']
for column in columns_to_drop:
    del df[column]

# 打印删除列后的数据帧
print(df)