Does not work on CentOS

[mikeover]

I did yum install python-crypto python-requests. Python-crypto installed but python-requests said No Package found.

Then when running pythong test-decrypt.py I get:
Traceback (most recent call last):
File "test-decrypt.py", line 5, in
from Crypto.Cipher import PKCS1_v1_5
ImportError: cannot import name PKCS1_v1_5

Please advise how to run this on CentOS. Thanks.