对大目录中的文件进行SHA1校验和并输出到文本文件

import os
import hashlib

def calculate_sha1(file_path):
    sha1_hash = hashlib.sha1()
    with open(file_path, 'rb') as file:
        while True:
            data = file.read(4096)
            if not data:
                break
            sha1_hash.update(data)
    return sha1_hash.hexdigest()

def traverse_directory(directory):
    file_checksums = {}
    for root, dirs, files in os.walk(directory):
        for file in files:
            file_path = os.path.join(root, file)
            sha1_checksum = calculate_sha1(file_path)
            file_checksums[file_path] = sha1_checksum
    return file_checksums

def write_checksums_to_file(file_checksums, output_file):
    with open(output_file, 'w') as file:
        for file_path, checksum in file_checksums.items():
            file.write(f"{file_path}: {checksum}\n")

# 指定目录路径
directory_path = '/path/to/directory'

# 执行遍历目录并计算SHA1校验和
file_checksums = traverse_directory(directory_path)

# 指定输出文件路径
output_file_path = '/path/to/output.txt'

# 将文件路径和SHA1校验和写入到文本文件
write_checksums_to_file(file_checksums, output_file_path)