CFB chaining mode requires padding

[Legrandin]

Almost the same thing as for the other bug about OFB.
CFB makes a stream cipher out of a block cipher.
Because of that it should not require padding.
However, CFB in pycrypto requires the plaintext/ciphertext to be multiple of the segment size.

Unlike for the OFB bug, the NIST 800-38A does not say anything about the last block.
However, most resources on the 'net refer to it as not requiring padding.