【pytab】汉字乱码或白框框

import matplotlib.pylab as plt   x = np.arange(1, 16, 1) y = np.array([105,180,323,371,1291,840,1032,1220,1347,1921,2103,2345,3156,2987,2447]) y1 = np.array([ 250,444,680,760,1771,1450,1737,1982,2102,

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