Python報錯之：AttributeError: 'NoneType' object has no attribute 'seq'

在用matplotlib進行數據可視化、給圖形添加標籤數據標籤時遇到一個報錯：AttributeError: 'NoneType' object has no attribute 'seq'.數組 記錄一下，代碼：spa from pylab import * import matplotlib.pyplot as plt a = ['a','b','c','d'] b = ['1','2','3

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