坚持mdates.date2num

Question

我一直在尝试寻找使用mdates.date2num的解决方案，但是尽管尝试了一些方法，我还是有错误。在

这是我的代码：

import matplotlib.pyplot as plt
import numpy as np
import urllib
import matplotlib.dates as mdates
#from matplotlib.dates import bytespdate2num

'''
datefunc = lambda x: mdates.date2num(datetime.strptime(x, '%Y%m%d'))
'''

def graph_data(stock):
fig = plt.figure()
ax1 = plt.subplot2grid((1,1), (0,0),)

stock_price_url =('http://chartapi.finance.yahoo.com/instrument/1.0/+stock+/chartdata;type=quote;range=10y/csv')
source_code = urllib.request.urlopen(stock_price_url).read().decode()
stock_data = []
spilt_source = source_code.split('\n')
for line in source_code:
    spilt_line = line.split(',')
    if len(spilt_line) == 6:
        if 'values' not in line and 'labels' not in line:
            stock_data.append(line)

date, closep, highp, lowp, openp, volume = np.loadtxt(
    stock_data,
    delimiter=',',
    unpack=True,
    # %Y = Full year. 2015
    # %y = partial year 15
    # %m = number of month
    # %d = number day
    # %H = hours
    # %M = minutes
    # %S = seconds
    converters={0: mdates.date2num('%Y%m%d')})
    #converters={0: datefunc})

ax1.plot_date(date, closep, '-', label='Price')
for label in ax1.xaxis.get_ticklables():
    label.set_rotation(45)

plt.xlabel('date')
plt.ylabel('Price')
plt.title('Interesting Graph')
plt.legend()
plt.show()


graph_data('TSLA')

正如评论所示，我已经尝试了几件事，但都没有成功。
我正在使用python3和pyCharm。在