centos7安装python3简单步骤_py3y7nvbv 2z0sois

#准备依赖

yum -y install gcc
yum -y install zlib-devel
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#下载源码

wget https://www.python.org/ftp/python/3.10.0/Python-3.10.0.tgz
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#解压安装

tar -xvf Python-3.10.0.tgz
cd Python-3.10.0
./configure --prefix=/usr/local/python3
make && make install
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#软连接

ln -s /usr/local/python3/bin/python3 /usr/local/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/local/bin/pip3
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#查看安装后的版本号

python3 -V
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#测试hello world

cat > hello.py << EOF
#!/usr/local/bin/python3

# -*- coding: utf8 -*-

print("hello world")

EOF
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[testuser@localhost ~]$ /usr/local/bin/python3 hello.py 
hello world
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#pip3使用及解决ssl module 的问题

比如，执行/usr/local/bin/pip3 install PyMySQL会报ssl module的问题如下
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not …

解决步骤：

1. 升级OpenSSL到1.1.1

#下载源码
wget https://codeload.github.com/openssl/openssl/zip/OpenSSL_1_1_1-stable

#解压
unzip openssl-OpenSSL_1_1_1-stable.zip

#安装，指定安装路径为/usr/local/openssl
./config --prefix=/usr/local/openssl
make && make install

#备份旧文件并加载新版本配置
mv /usr/bin/openssl /usr/bin/openssl.old
mv /usr/lib64/openssl /usr/lib64/openssl.old
mv /usr/lib64/libssl.so /usr/lib64/libssl.so.old
ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/openssl/include/openssl /usr/include/openssl
ln -s /usr/local/openssl/lib/libssl.so /usr/lib64/libssl.so
echo "/usr/local/openssl/lib" >> /etc/ld.so.conf
ldconfig -v 

#查看版本
openssl version
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2. 重新编绎Python

cd Python-3.10.0
./configure --prefix=/usr/local/python3 --with-openssl=/usr/local/openssl
make & make install
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3. 安装PyMySQL

/usr/local/bin/pip3 install PyMySQL
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最后测试是否正常如下：