python3的安装与简介

Python安装(linux)

1 安装python3.6可能使用的依赖

#yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel

2 把Python3.6安装到 /usr/local 目录

# tar -xzvf Python-3.6.1.tgz

# cd  Python-3.6.1/

# ./configure  --prefix=/usr/local/

# make

# make altinstall

python3.6程序的执行文件：/usr/local/bin/python3.6

python3.6应用程序目录：/usr/local/lib/python3.6

pip3的执行文件：/usr/local/bin/pip3.6

pyenv3的执行文件：/usr/local/bin/pyenv-3.6

---------------------------以下设置"python"命令链接Python3-----------------------------------

1 更改/usr/bin/python链接

# cd/usr/bin

# mv  python python.backup

# ln -s /usr/local/bin/python3.6 /usr/bin/python

# ln -s /usr/local/bin/python3.6 /usr/bin/python3

#rm -rf /usr/bin/python2

#ln -s /usr/bin/python2.6 /usr/bin/python2    *****

2 更改yum脚本的python依赖

# cd /usr/bin

# ls yum*

yum yum-config-manager yum-debug-restore yum-groups-manager

yum-builddep yum-debug-dump yumdownloader

更改以上文件头为

#!/usr/bin/python 改为 #!/usr/bin/python2

-----------------------------------python常用库与安装--------------------------

常用的科学计算、数据挖掘机器学习等python第三方库主要有：Numpy、Scipy、Matplotlib、Pandas、StatsModels、Scikit-Learn、Keras、Gensim

pip install 库名