负载转换器

负载转换器示例

输出：

  1. loading /home/tcaswell/mc3/envs/dd37/lib/python3.7/site-packages/matplotlib/mpl-data/sample_data/msft.csv
  1. import numpy as np
  2. import matplotlib.pyplot as plt
  3. import matplotlib.cbook as cbook
  4. from matplotlib.dates import bytespdate2num
  6. datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
  7. print('loading', datafile)
  9. dates, closes = np.loadtxt(datafile, delimiter=',',
  10.                            converters={0: bytespdate2num('%d-%b-%y')},
  11.                            skiprows=1, usecols=(0, 2), unpack=True)
  13. fig, ax = plt.subplots()
  14. ax.plot_date(dates, closes, '-')
  15. fig.autofmt_xdate()
  16. plt.show()

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