gistfile1.py

def get_hash(file_path, hash_name="sha256", block_size=4096):                                                      
    # hash_name = md5 / sha256 / sha512                                               
    hash = hashlib.new(hash_name)                                                     
    with open(file_path, "rb") as f:                                                  
        for block in iter(lambda: f.read(block_size), ""):                            
            hash.update(block)                                                        
                                                                                      
    return hash.hexdigest()