Centos7安装python3+Selenium+chrome+chromedriver详细

python2和python3共存,Selenium错误的处理

更新Centos源

wget -O /etc/yum.repos.d/CentOS-Base.repo /repo/Centos-7.repo或者curl -o /etc/yum.repos.d/CentOS-Base.repo /repo/Centos-7.repo#下载完后,运行下面命令:yum clean allyum makecache

1.Python3安装与python2共存

wget /python/3.6.2/Python-3.6.2.tar.xzyum install libffi-devel expat-devel gdbm-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc makemv /usr/bin/python /usr/bin/python.baktar -xvJf Python-3.6.2.tar.xzcd Python-3.6.2./configure prefix=/usr/local/python3make && make installmake cleanln -s /usr/local/python3/bin/python3 /usr/bin/python

python -V 检查下是不是python3

python2 -V 检查下是不是python2

如果上面正常显示,请继续设置下。yum需要python2版本，所以我们还要修改yum的配置。/usr/libexec/urlgrabber-ext-down也需要修改python2

vi /usr/bin/yum#把文件第一行python改成python2#!/usr/bin/python2 import sys try: import yum except ImportError: ......继续修改urlgrabber-ext-downvi /usr/libexec/urlgrabber-ext-down#跟上面一样修改第一行python改成python2#! /usr/bin/python2 # A very simple external downloader# Copyright - Zdenek Pavlas

python2和python3共存:默认pip是python2,python3需要如何配置？如果pip也没有安装,就先安装pip

yum -y install epel-releaseyum install python-pip

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

配置pip源按自己需要,也可以不配置

mkdir ~/.pipvi pip.conf[global]timeout = 60index-url = /simple

2.chrome安装和chromedriver下载

chrome下载安装

yum install /linux/direct/google-chrome-stable_current_x86_64.rpm

chromedriver下载,我下载的是最新版本。chrome也是最新版本

/mirrors/chromedriver/2.40/chromedriver_linux64.zip

3.安装selenium,使用是的python3

pip3 install selenium

测试开始:

创建一个名字为test目录,目录结构如下:

[root@localhost test]# tree .├── chromedriver└── test.py

test.py测试代码如下:chrome界面浏览

# -*- coding:utf-8 -*-from selenium import webdriveroptions = webdriver.ChromeOptions()options.add_argument('--headless')options.add_argument('--disable-gpu')driver = webdriver.Chrome(executable_path="/root/test/chromedriver", chrome_options=options)driver.get("")print(driver.page_source)driver.quit()

测试运行看看

python test.py

运行完果断报错

raise exception_class(message, screen, stacktrace)mon.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn't exist

修改test.py加上–no-sandbox完美解决。当然使用selenium可能会出现其他的错误，我会在其他文章收集些错误解决办法。

# -*- coding:utf-8 -*-from selenium import webdriveroptions = webdriver.ChromeOptions()options.add_argument('--headless')options.add_argument('--disable-gpu')options.add_argument('--no-sandbox')driver = webdriver.Chrome(executable_path="/root/test/chromedriver", chrome_options=options)driver.get("")print(driver.page_source)driver.quit()