使用 python 脚本从文件夹中删除文件时出现错误

Question

我正在运行一个 python 脚本，该脚本会从文件夹中删除文件。我在虚拟机中运行该脚本...但我收到如下错误：

回溯（最近一次调用最后一次）： 文件“C:\Users\Desktop\hyta\python_scripts\python_scr ile_delete.py”，第 66 行，位于

我的代码：

import os
import csv

def extract_sql_filenames_from_yaml(yaml_file):
    sql_filenames = {}
    with open(yaml_file, 'r') as file:
        is_sql_section = False
        for line in file:
            line = line.strip()
            if line == 'sql:':
                is_sql_section = True
            elif is_sql_section and line.startswith('- name:') and not line.startswith('#'):
                filename = line.split(':')[-1].strip()
                if filename.endswith('.sql'):
                    sql_filenames[filename] = sql_filenames.get(filename, 0) + 1
            elif line.startswith('-') and not line.startswith('#'):
                is_sql_section = False
    return sql_filenames

def compare_and_delete_sql_files(folder_a, folder_b, output_csv, sql_filenames):
    processed_filenames = set()  # To keep track of processed filenames

    # Initialize CSV file writer
    with open(output_csv, 'w', newline='') as csvfile:
        fieldnames = ['SQL File Name', 'Occurrences', 'Match Status', 'Delete Status']
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        writer.writeheader()

        # Iterate through each SQL filename extracted from YAML
        for filename, occurrences in sql_filenames.items():
            # Skip processing if the filename has already been processed
            if filename in processed_filenames:
                continue

            # Mark the filename as processed
            processed_filenames.add(filename)

            sql_file_a = os.path.join(folder_a, filename)
            match_status = 'Not Matched'
            delete_status = 'Not Deleted'

            # Check if the file exists in folder_a
            if os.path.exists(sql_file_a):
                # Compare with folder_b if necessary
                if os.path.exists(os.path.join(folder_b, filename)):
                    with open(sql_file_a, 'r') as f_a, open(os.path.join(folder_b, filename), 'r') as f_b:
                        lines_a = f_a.readlines()
                        lines_b = f_b.readlines()
                        if lines_a == lines_b:
                            match_status = 'Matched'
                            delete_status = 'Deleted'
                            # Delete file from folder_b
                            os.remove(os.path.join(folder_b, filename))

            # Write to CSV
            writer.writerow({'SQL File Name': filename, 'Occurrences': occurrences,
                             'Match Status': match_status, 'Delete Status': delete_status})

# Example usage
folder_a = '/path/to/folder/a'
folder_b = '/path/to/folder/b'
output_csv = 'comparison_results.csv'
yaml_file = 'example.yaml'

sql_filenames = extract_sql_filenames_from_yaml(yaml_file)
compare_and_delete_sql_files(folder_a, folder_b, output_csv, sql_filenames)

Answer 1

PermissionError: [WinError 32] 该进程无法访问该文件，因为该文件正在被另一个进程使用:

错误表明文件已打开，因此无法删除。

发生这种情况是因为您正在删除代码的

open with

块内的文件。

在

os.remove(os.path.join(folder_b, filename))

块之外执行此行

open

。

确保

folder_b

和

filename

变量可用。