Python basis of nine --hashlib, hmac module

A, hashlib

　　1. 实例化：md5_handler = hashlib.md5() / hash_handler = hashlib.sha256('1234',encode('utf8'))；

　　2. 编码：md5_handler.update(str_data.encode("utf-8"))；

　　3. coding result: md5_handler.hexdigest ();

Two, hmac (internal key for us to create content for further processing and then re-encrypted)

　　1. instantiated: h_handler = hmac.new (str_data.encode ( 'utf-8'));

　　2. additions: h_handler.update ( 'gangzi'.encode (' utf-8 '));

　　3. Results: h_handler.hexdigest () / h_handler.digest;