cenos7上部署python3环境以及mysqlconnector2.1.5

本机的python2不要管他，因为可能有程序依赖目前的python2环境，比如yum！！！！！

一。安装python3依赖环境：

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

1.下载python3安装包

wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz

2.安装python3（创建安装目录-->解压安装包-->进入解压目录-->编译安装）

1 mkdir -p /usr/local/python3
2 
3 tar -zxvf Python-3.6.1.tgz
4 cd Python-3.6.1
5 
6 ./configure --prefix=/usr/local/python3
7 make && make install

安装命令

3.建立python3软连接

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

5. 并将/usr/local/python3/bin加入PATH

# vim ~/.bash_profile

 1 # .bash_profile
 2 
 3 # Get the aliases and functions
 4 if [ -f ~/.bashrc ]; then
 5         . ~/.bashrc
 6 fi
 7 
 8 # User specific environment and startup programs
 9 
10 PATH=$PATH:$HOME/bin:/usr/local/python3/bin
11 
12 export PATH

配置文件

修改完记得执行下面的命令，让修改的生效：

# source ~/.bash_profile

6.检查Python3及pip3是否正常可用

# python3 -V
Python 3.6.1
# pip3 -V
pip 9.0.1 from /usr/local/python3/lib/python3.6/site-packages (python 3.6)

注意：不行的话在创建一下pip3的软链接

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

二。安装pip以及setuptools

1、安装pip前需要前置安装setuptools

1 wget --no-check-certificate  https://pypi.python.org/packages/source/s/setuptools/setuptools-19.6.tar.gz#md5=c607dd118eae682c44ed146367a17e26
2 
3 tar -zxvf setuptools-19.6.tar.gz
4 
5 cd setuptools-19.6
6 
7 python3 setup.py build
8 
9 python3 setup.py install

安装命令

注意：报错： RuntimeError: Compression requires the (missing) zlib module

 1 我们需要在linux中安装zlib-devel包，进行支持。
 2 yum install zlib-devel
 3 
 4 需要对python3.6进行重新编译安装。
 5 cd python3.6.1
 6 make && make install
 7 又是漫长的编译安装过程。
 8 
 9 重新安装setuptools
10 python3 setup.py build
11 python3 setup.py install

解决办法

2.安装pip

1 wget --no-check-certificate  https://pypi.python.org/packages/source/p/pip/pip-8.0.2.tar.gz#md5=3a73c4188f8dbad6a1e6f6d44d117eeb
2 
3 tar -zxvf pip-8.0.2.tar.gz
4 
5 cd pip-8.0.2
6 python3 setup.py build
7 python3 setup.py install

命令如下：

pip安装命令：

pip3 install paramiko

注意：报错：pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

1 yum install openssl
2 
3 yum install openssl-devel
4 
5 cd python3.6.1
6 
7 make && make install

解决办法

三.安装支持Python3的mysqlconnector2.1.5

1.查看python3安装位置命令：

[root@apps mnt]# whereis python3
python3: /usr/bin/python3 /usr/local/python3

2.注意事项以及安装命令：

1 这里有个问题容易迷惑人，因为系统中python2和3并存，下载的mysqlconnector RPM包安装的时候会自动安装到python2的库目录里面去，所以用的是mysqlconnector源码安装的方法，用python3命令去调用安装，这样就可以给python3装上这个包了。
2 
3 
4 wget https://dev.mysql.com/get/Downloads/Connector-Python/mysql-connector-python-2.1.5.tar.gz --no-check-certificate
5 
6 tar -zxvf mysql-connector-python-2.1.5.tar.gz
7 cd mysql-connector-python-2.1.5
8 python3 setup.py install

安装注意事宜！

3.测试是否安装成功:

1 [root@apps mnt]# python3
2 Python 3.6.1 (default, Nov 20 2018, 15:27:00) 
3 [GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux
4 Type "help", "copyright", "credits" or "license" for more information.
5 >>> from distutils.sysconfig import get_python_lib
6 >>> print(get_python_lib())
7 /usr/local/python3/lib/python3.6/site-packages
8 >>> import mysql.connector#这里不报错就说明connector已经安装成功可以导入了

测试导入模块操作