# Install Python 3.8 on SLE Micro 5.5

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1. Login as root user

    $ sudo -i

2. Open up a transactional-update shell session

    $ transactional-update shell

3. install the necessary interdependent software packages

    $ zypper install zlib-devel make gcc

4. Download the python from `www.python.org`

    $ curl -sO https://www.python.org/ftp/python/3.8.20/Python-3.8.20.tgz

5. Unzip it and Go to the folder

    $ tar zxfv Python-3.8.20.tgz && \
      cd Python-3.8.20/

6. Make a directory where you want to put your python. I called my `.localpython3.8` (name it whatever you want) and make it under the home directory. Configured the Python make

    $ mkdir /root/.localpython3.8

    $ ./configure --prefix=/root/.localpython3.8

7. Make and make altinstall (see difference between install and altinstall here)

    $ make

    $ make altinstall

8. Exit the `transactional-update` session and reboot to the new snapshot that contains the changes you have made

    $ exit

    $ reboot

9. Login as root user again

    $ sudo -i

10. configure PATH env and alias

    $ cat <<'EOF' >> /root/.bashrc
    export PATH=/root/.localpython3.8/bin:$PATH
    EOF

    $ cat <<'EOF' >> /root/.alias
    alias python=/root/.localpython3.8/bin/python3.8
    EOF
    
    $ exit
    
    # Login again
    $ sudo -i

11. 寫一個簡單的程式快速測試

    $ cat <<'EOF' > test.py
    message = "Hello, World!"
    print(message)

    numbers = [1, 2, 3, 4, 5]

    for num in numbers:
        print(num)

    def add_numbers(x, y):
        return x + y

    result = add_numbers(2, 3)
    print(result)

    import datetime

    now = datetime.datetime.now()
    formatted_date_time = now.strftime("%Y-%m-%d %H:%M:%S")
    print(formatted_date_time)
    EOF

12. 執行測試程式

    $ python test.py

執行結果如下 :

    Hello, World!
    1
    2
    3
    4
    5
    5
    2024-11-14 16:06:00

## 參考文章

- [Install Python on Linux without Sudo](https://justinhou95.github.io/blog/2024/install-python/)