python3.5 安装方法及遇到的问题解决

安装步骤:

1.下载Python-3.5.4.tgz安装压缩包(可到python官网下载)

2.    mkdir /usr/local/python3

3.    tar -zxvf Python-3.5.4.tgz(解压到/usr.local/python3)

4.    yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel (安装特定的开发程序)

5.    cd /usr/local/python3/Python-3.5.4(cd到解压出来的目录上)

6    ./configure --prefix=/usr/local/python3.5(在/usr/localpython3/Python-3.5.4/路径安装)

7.    make && make install

 

 


问题1: Python3.5安装报错 configure: error: in `/usr/local/python3/Python-3.5.4':

报错描述:

[root@localhost Python-3.5.4]#  ./configure  --prefix=/usr/local/python3.5

checking build system type... x86_64-pc-linux-gnu

checking host system type... x86_64-pc-linux-gnu

checking for python3.5... no

checking for python3... no

checking for python... python

checking for --enable-universalsdk... no

checking for --with-universal-archs... no

checking MACHDEP... linux

checking for --without-gcc... no

checking for --with-icc... no

checking for gcc... no

checking for cc... no

checking for cl.exe... no

configure: error: in `/usr/local/python3/Python-3.5.4':

configure: error: no acceptable C compiler found in $PATH

 

问题分析:缺少gcc编译环境

解决方法:

yum -y install gcc

 

问题2: 安装python时出现Ignoring ensurepip failure:pip required SSL/TLS

报错描述:

Ignoring ensurepip failure: pip 9.0.1 requires SSL/TLS

问题分析:缺少openssl-devel包

解决方法:

yum -y install openssl-devel

 

问题3:如何设置环境变量,直接输入python3就可以进入python3版本

解决方法:

echo "export PATH=$PATH:/usr/local/python3/bin/" >> /etc/profile.d/python3.sh

export PATH=$PATH:/usr/local/python3/bin/

 

问题4:如果装了ipython,如何在python2,python3都可以使用ipyhon

解决方法:

先使用pip2 -V 和 pip3 -V 确认对应的python版本正确

之后

pip2 install ipython 安装python2的

pip3 install ipython 安装python3的

 

最后shell中执行ipython或ipython3会进入不同的python版本

 

 

 

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