Software for file encryption / decryption

1 . The program first generates the encryption key for a certain length which then records in the text file.
The 2nd And with the help of this key encrypts all the files of the task extended in the folder and further on the tree of all the files.
3 . The program also contains a sub-software to decrypt files. Where first the key is asked for decryption and then with the help of it decrypts all found programs encrypted files in the tree of the folder.

Python (Python and PyAesCrypt Library)