redhat7.6安裝python3 pip3

安裝python

1.安裝環境

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

2.下載包

wget https://www.python.org/ftp/python/3.7.7/Python-3.7.7.tgz

3.解壓包

tar -zxvf Python-3.7.7.tgz 

4.創建安裝目錄，進入解壓后的包，制定安裝路徑進行安裝

mkdir -p /usr/local/python3
 
cd Python-3.6.1
 
./configure --prefix=/usr/local/python3

報錯：
[root@localhost Python-3.7.7]# ./configure --prefix=/usr/local/python3
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for python3.7... no
checking for python3... no
checking for python... python
checking for --enable-universalsdk... no
checking for --with-universal-archs... no
checking MACHDEP... 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 `/root/Python-3.7.7':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

因為缺少GCC編譯環境：
yum -y install gcc

5.編譯安裝

make && make install

6.創建軟連接

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

7、在線升級pip和setuptools

./pip3 install --upgrade setuptools pip

python默認的pip版本和setuptools版本比較舊，如果有網，可以在線更新，下面記錄一下離線更新

8.

第7步的升級不成功

手動安裝，官網查的安裝方法

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

然后到下載目錄執行以下命令：

python get-pip.py

9.升級Pip

[root@localhost bin]# pip3 install -U pip
Requirement already up-to-date: pip in /usr/local/python3/lib/python3.7/site-packages (20.0.2)
[root@localhost bin]# which pip3 /usr/bin/pip3