matplotlib使用过程中报错：matplotlib.category: Using categorical units to plot a list of strings that are all parsable as floats or dates. If these strings should be plotted as numbers, cast to the appropriate data type before plotting.
解决示例：
import matplotlib.pyplot as plt
import logging
logging.basicConfig(level='INFO')
mlogger = logging.getLogger('matplotlib')
mlogger.setLevel(logging.WARNING)
data = {'Monday': 154, 'Thursday': 153, 'Tuesday': 151, 'Sunday': 144, 'Wednesday': 139, 'Friday': 130, 'Saturday': 120}
names = list(data.keys())
values = list(data.values())
fig, axs = plt.subplots(figsize=(9, 3))
axs.bar(names, values)
plt.show()or
plt.set_loglevel('WARNING')