为什么df.info()给出了错误的标题？

import pandas as pd

# 假设你的 CSV 文件没有列名
data = pd.read_csv('your_file.csv', names=['col1', 'col2', 'col3'])
print(data.info())

import pandas as pd

data = pd.read_csv('your_file.csv')
data.columns = ['new_col1', 'new_col2', 'new_col3']
print(data.info())

import pandas as pd

df1 = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df2 = pd.DataFrame({'A': [7, 8, 9], 'C': [10, 11, 12]})

# 使用 merge 方法合并 DataFrame
merged_df = pd.merge(df1, df2, on='A')
print(merged_df.info())

import pandas as pd

data = pd.read_csv('your_file.csv')
data = data.drop(columns=['old_col'])  # 删除列
data = data.rename(columns={'old_name': 'new_name'})  # 重命名列
print(data.info())