python matplotlib显示中文和负数符号

代码示例：

import sys
import matplotlib.pyplot as plot


if 'win' in sys.platform:
    plot.rcParams['font.sans-serif'] = ['Songti SC']  # 用来正常显示Windows中文标签
else:
    plot.rcParams['font.sans-serif'] = ['SimHei']  # 用来正常显示MacOS中文标签
# 显示负数符号
plot.rcParams['axes.unicode_minus'] = False