How to store batch file MD5 codes using Python?

To achieve batch storage of file MD5 codes, follow these steps:

1. a library for cryptographic hashing algorithms

import hashlib

1. Create a function that calculates the MD5 hash of a file. The function should take the file path as input and return the MD5 hash of the file.

def calculate_md5(file_path):
    # 创建一个MD5对象
    md5 = hashlib.md5()
    
    # 打开文件并逐行读取内容进行更新
    with open(file_path, 'rb') as file:
        for line in file:
            md5.update(line)
    
    # 返回文件的MD5码
    return md5.hexdigest()

1. Create a function for calculating the MD5 hash of files in bulk and storing them. The function takes a folder path as input, goes through all the files in the folder, calculates the MD5 hash of each file, and stores the MD5 hash along with the file name in a dictionary.

def batch_calculate_md5(folder_path):
    # 创建一个空字典用于存储文件名与MD5码的对应关系
    md5_dict = {}
    
    # 遍历文件夹中的所有文件
    for file_name in os.listdir(folder_path):
        # 拼接文件路径
        file_path = os.path.join(folder_path, file_name)
        
        # 计算文件的MD5码
        md5 = calculate_md5(file_path)
        
        # 将文件名与MD5码存储到字典中
        md5_dict[file_name] = md5
    
    # 返回存储了文件名与MD5码对应关系的字典
    return md5_dict

1. process multiple files and compute their MD5 checksums on all at once
2. a data format commonly used in web development for storing and exchanging data

import json

md5_dict = batch_calculate_md5('/path/to/folder')

# 将字典转换为JSON字符串
json_data = json.dumps(md5_dict)

# 将JSON字符串写入到文件中
with open('/path/to/output_file.json', 'w') as file:
    file.write(json_data)

This way, the MD5 checksum of all files in the folder will be calculated and saved to a specified file.