pyplot在一个图中画多条线的方式

pyplot_draw_two_lines.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys

reload(sys)
sys.setdefaultencoding('utf-8')
import matplotlib
# matplotlib.use('Agg')
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.dates as mdate
import pylab as pl
import datetime
import time


def draw_total(time_list1, bandwidth1, time_list2, bandwidth2):
    pl.plot(time_list1, bandwidth1, 'r', label='bandwidth1')
    pl.plot(time_list2, bandwidth2, 'g', label='bandwidth2')
    pl.xlabel('time axis')
    pl.ylabel('bandwidth axis')
    pl.gca().xaxis.set_major_formatter(mdate.DateFormatter('%H'))
    pl.grid(True)
    pl.legend(loc='upper left')
    pl.show()
    while True:
        time.sleep(1)


def new_time_list(time_list):
    new_times = []
    for time_str in time_list:
        new_times.append(datetime.datetime.strptime(time_str, '%Y-%m-%d %H:%M:%S'))

    return new_times

if __name__ == '__main__':
    draw_total(new_time_list(["2017-11-3 12:11:12", "2017-11-3 13:11:12", "2017-11-3 14:11:12"]),
               [12, 234, 234],
               new_time_list(["2017-11-3 12:11:12", "2017-11-3 13:11:12", "2017-11-3 14:11:12"]),
               [224, 55, 33])