1.40

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DataFrame合并数据df.append

import pandas as pd from pandas import DataFrame df1 = DataFrame([[1.4,2],[7.1,-4.5], [2,3],[0.75,-1.3]], columns=['one','two']) print(df1) df2 = DataFrame([[1.4,2],[7.1,-4.5], [2,3],[0.7

KVM之KVM安装部署

一. 准备工作：系统环境：centos 7.7 关闭selinux：[root@localhost ~]# setenforce 0*[root@localhost ~]# sed -ri 's/^(SELINUX=)./\1disabled/g' /etc/selinux/config [root@localhost ~]# getenforce **Disabled 2.关闭防火墙：[root@localhost ~]# systemctl status firewalldf

Linux下环境变量临时和永久设置

临时添加环境变量用export, 加:PATH是将此变量添加在后面exportPATH=/home/john/bitbake−1.40/bin:PATH是将此变量添加在后面 export PATH=/home/john/bitbake-1.40/bin:PATH是将此变量添加在后面exportPATH=/home/john/bitbake−1.40/bin:PATH export PYTHONPATH=/home/j