[pycrypto] rsa decryption question

[Tobias Koeck]

I have an encrypted string and a key string (512 bits long, represents 
a RSA key). After studying the pycrypto documentation I still don't 
get how to read the
private key form the key string and decrypt the string.

- read the 512 bit string as private key
- decrypt the encrypted string with rsa

Any short code example how to do that?

Greetings and thanks