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1.安装新版本pythonsudo apt-get install python3python3被安装在/usr/local/lib路径，到此目录下查看python3的版本号，例如python3.52.删除/usr/bin路径下的python link文件cd /usr/binsudo rm -rf python3.重新建立连接sudo ln

1. 排序# 升序：sort_order = np_data[:,col_index].argsort()sort_data = np_data[sort_order]# 降序：sort_order = np_data[:,col_index].argsort()sort_order = sort_order[::-1]sort_data = np_data[sort_orde...

1. np.appenda = np.array([[1,2,3], [4,5,6]]) # shape: 2,3print(a)b = np.array([[7,8,9]]) # shape: 1,3print(b)c = np.array([[11], [12]]) # shape: 2,1print(c)merged = np.append(a, b, axis...