关于python matplotlib的问题

Question

import matplotlib.pyplot as plt
import numpy as np
bar_width = 0.4
plt.bar(left = np.arange(len(school)),height = group_ms,label = 'MS', color = 'steelblue',width = bar_width)
plt.bar(left = np.arange(len(school))+bar_width,height = group_gp,label = 'GP', color = 'indianred',width = bar_width)
plt.xticks(np.arange(3)+0.2,school)
plt.legend()
plt.show()

错误代码是：

TypeError                                 Traceback (most recent call last)
<ipython-input-80-f63fd0192e45> in <module>
      2 import numpy as np
      3 bar_width = 0.4
----> 4 plt.bar(left = np.arange(len(school)),height = group_ms,label = 'MS', color = 'steelblue',width = bar_width)
      5 plt.bar(left = np.arange(len(school))+bar_width,height = group_gp,label = 'GP', color = 'indianred',width = bar_width)
      6 plt.xticks(np.arange(3)+0.2,school)

TypeError: bar() missing 1 required positional argument: 'x'

数据是

需要将两个学校的数据进行对比

Answer 1

把plt.bar 中的left 换成x就可以了