"""
Read user agents from list (local file) and select one for the request.
"""
import random

def user_agent_list(user_agent_list_path):
    """Read user agents from list (local file). """
    with open(user_agent_list_path, "r") as f:
        agent_list = f.readlines()
    return agent_list

def select_user_agent(agent_list):
    """Select random user agent from pre-loaded list of agents. """
    n_agents = len(agent_list)
    agent = {}
    agent["user-agent"] = agent_list[random.randint(0, n_agents-1)].replace("\n", "").replace("\"", "")
    return agent