linux系统下python开发环境搭建

jango与php一样，写框架
javascript可以从后端到前端

python在linux中的安装

（1）上传把并解压对应版本安装包
[[email protected] ~]# tar xf Python-3.7.3.tar.xz 先上传，再解压

（2）安装python3 进入解压后的Python-3.7.3中。./之前要建好文件夹
[[email protected] Python-3.7.3]# yum install gcc gcc-c++ make zlib* -y
[[email protected] Python-3.7.3]# yum install libffi-devel -y
[[email protected] Python-3.7.3]# ./configure --prefix=/usr/local/python3 在Python3中执行
[[email protected] Python-3.7.3]# make
[[email protected] Python-3.7.3]# make install

(3) 配置执行文件路径
[[email protected] Python-3.7.3]# cd /usr/bin
[[email protected] bin]# mv /usr/bin/python /usr/bin/pythonbak
[[email protected] bin]# ln -fs /usr/local/python3/bin/python3 /usr/bin/python3
(4) 安装完成后测试python3和python2能不能分别调用*yum install 不能正常使用
（5）修改yum配置 将所有python变成pythonbak，如果变为python2则2不能被调用
[[email protected] ~]# vim /usr/bin/yum
[[email protected] ~]# vim /usr/libexec/urlgrabber-ext-down

over

3.4.3 安装虚拟环境
pip install virtualenv

出现报错，执行python -m pip install --upgrade pip进行升级，再pip install virtualenv[[email protected] etc]# yum install python-virtualenv
配置国内源安装
pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com/simple virtualenv
3.4.4 新建虚拟环境
virtualenv scrapytest 创建名为 scrapytest 的虚拟环境 自动在C盘建立了一个叫scrapytest的文件夹
virtualenv -p C:...(python安装目录) \python.exe scrapytest
[[email protected] ~]# virtualenv py2 在root下执行即可
[[email protected] bin]# virtualenv -p /usr/local/bin/python3 py3 将/usr/bin/python3复制到/usr/local/bin,然后执行此条命令，产生了新的py3和子bin。进入/usr/local/bin/py3/bin中，执行source activate 有正确的反馈
3.4.5 运行虚拟环境
cd \scrapytest\Scripts\ 要写绝对途径
source activate.bat
activate.bat
[[email protected] bin]# source activate
(py2)
[[email protected] bin]# python
3.4.6 退出虚拟环境
deactivate.bat
(py2) [[email protected] bin]# deactivate

标准化输出


#!/bin/evn python
#-*- coding:utf-8 -*-
#Author:Anliu
Name = input("Name:")
Age = int(input("Age:"))
print(type(Age))
Job = input("Job:")
Salary = input("Salary:")
info = '''
-----------info of %s -------------
Name:%s
Age:%d
Job:%s
Salary:%s
'''%(Name,Name,Age,Job,Salary)
print(info)

#!/bin/evn python
#-*- coding:utf-8 -*-
#Author:Anliu
Name = input("Name:")
Age = int(input("Age:"))#
print(type(Age))
Job = input("Job:")
Salary = input("Salary:")

info = '''
-----------info of {_name} -------------
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_Salary}'''

.format(_name=Name,
_age=Age,
_job=Job,
_salary=Salary)
print(info)

#!/bin/evn python
#-*- coding:utf-8 -*-
#Author:Anliu
Name = input("Name:")
Age = int(input("Age:"))#
print(type(Age))
Job = input("Job:")
Salary = input("Salary:")

info = '''
-----------info of {0} -------------
Name:{0}
Age:{1}
Job:{2}
Salary:{3}''' .format(Name,
Age,
Job,
Salary)
print(info)