提取csv文件具有某个特征的的所有行，保存在CSV文件中，文件名为task1-1A.csv

当你想要从一个CSV文件中提取具有特定特征的所有行，并将这些行保存到新的CSV文件中，你可以使用Python的pandas库。首先，你需要读取原始的CSV文件，然后利用pandas的数据过滤功能来选择满足特定条件的行，最后再将结果写入到新文件中。以下是一个简单的步骤：

import pandas as pd

# 读取原始CSV文件
original_df = pd.read_csv('原文件.csv')

# 定义特征列名和目标值
feature_column = 'your_feature_column'
target_value = 'target_value'

# 使用条件筛选行
filtered_df = original_df[original_df[feature_column] == target_value]

# 将筛选后的数据保存到新的CSV文件
filtered_df.to_csv('task1-1A.csv', index=False)  # index=False 防止index列也被写入

在这个例子中，假设`your_feature_column`是你想要筛选的具体特征，`target_value`是你所指定的目标值。运行这段代码后，`task1-1A.csv` 文件就会只包含特征列中值为 `target_value` 的行。

相关问题

PermissionError: [Errno 13] Permission denied: 'D:/数据分析/寒假任务/暑期任务/数据分析题目/数据分析招新题目/task1-1A.csv'

This error message indicates that the user running the code does not have permission to access or modify the file "task1-1A.csv" located at "D:/数据分析/寒假任务/暑期任务/数据分析题目/数据分析招新题目/".

To resolve this issue, you can try the following solutions:

1. Check if the file is currently being used by another program. If so, close the program and try again.

2. Check if the file has read-only permissions. If so, change the permissions to allow the user to modify the file.

3. Check if the file is locked or encrypted. If so, unlock or decrypt the file before attempting to modify it.

4. Run the code as an administrator or with elevated privileges to gain access to the file.

5. If none of the above solutions work, try copying the file to a different location or renaming the file to a different name and see if that resolves the issue.