Question

在使用文件和加密库时，读取文件时遇到问题。详细信息如下，

出现以下异常：

Traceback (most recent call last):
  File "F:/PyCharm Python Works/OpenCity/main_directory/main_file.py", line 8, in <module>
    fe.encrypt_file(z2[0], z2[1])
  File "F:\PyCharm Python Works\OpenCity\cryptograph\file_encryptor.py", line 4, in encrypt_file
    keys = kr.read_keys()
  File "F:\PyCharm Python Works\OpenCity\cryptograph\key_reader.py", line 3, in read_keys
    f1 = open('keys.key', 'rb')
FileNotFoundError: [Errno 2] No such file or directory: 'keys.key'

密码器 file_decryptor.py：

def decrypt_file(x, y):

    from cryptograph import key_reader as kr
    from cryptography.fernet import Fernet
    keys = kr.read_keys()
    key = keys[0]
    input_file = x
    output_file = y

    with open(input_file, 'rb') as f:
        data = f.read()

    f1 = Fernet(key)
    encrypted = f1.decrypt(data)

    with open(output_file, 'wb') as f:
        f.write(encrypted)

file_encryptor.py：

def encrypt_file(x, y):
    from cryptograph import key_reader as kr
    from cryptography.fernet import Fernet
    keys = kr.read_keys()
    key = keys[0]
    input_file = x
    output_file = y

    with open(input_file, 'rb') as f:
        data = f.read()

    f2 = Fernet(key)
    encrypted = f2.encrypt(data)

    with open(output_file, 'wb') as f:
        f.write(encrypted)

key_reader.py：

def read_keys():
    from typing import List
    f1 = open('keys.key', 'rb')
    f2: List[bytes] = []
    data: bytes
    for data in f1:
        f2.append(data)
    print(f2)
    return f2

main_file.py：

from cryptograph import file_encryptor as fe
from cryptograph import file_decryptor as fd
z1r = open('files.txt', 'r')
z2 = []
for data in z1r:
    data = data.rstrip('\n')
    z2.append(data)
fe.encrypt_file(z2[0], z2[1])
fd.decrypt_file(z2[1], z2[2])

我刚刚完成了高级类别。密码记录仪就是问题所在。一切正常，除了main_file引起问题。

Answer 1

错误的确切原因是

"File "F:\PyCharm Python Works\OpenCity\cryptograph\key_reader.py", line 3, in 
read_keys
f1 = open('keys.key', 'rb')"

这归咎于没有keys.key文件。因此，您应该确认“ F：\ PyCharm Python Works \ OpenCity \ cryptograph \”目录中是否存在“ keys.key”文件。

Answer 2

确保将keys.key文件保存在key_reader.py所在的位置。

或者改用绝对路径，例如：

f1 = open('F:/path/to/file/key.key', 'rb')

Answer 3

使用os.chdir()更改目录有助于解决此问题。

参考代码：

import cryptograph.key_writer

key_writer.write_key('keys.key', 1)

cryptograph / key_writer.py

import os


def write_key(file, number_of_keys):
    # create key
    keys = []
    for i in range(number_of_keys):
        key.append(create_key())

    os.chdir('./cryptograph')
    # write keys to file
    with open(file, 'w') as f:
        for key in keys:
            f.write(key)
    return None # it is fine not to have this return stmt, but I like to have it.

FileNotFoundError：[错误2]没有这样的文件或目录：'keys_keys.txt'

3 个答案: