Installing python on oracle linux

Содержание

Oracle В® Linux 8
Installing and Managing Python
Oracle Legal Notices
Oracle Documentation License
ChapterВ 2В Installing Python
2.1В Installing Python 2
2.2В Installing Python 3
2.3В Installing Additional Python Libraries
Installing python on oracle linux
Install Python and Additional Libraries
Upload the API and the Machine Learning Model
Install and Configure Gunicorn on Oracle Linux
Install and Configure Nginx on Oracle Linux

Oracle В® Linux 8

Installing and Managing Python

Oracle Legal Notices

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ChapterВ 2В Installing Python

This chapter describes how to install multiple versions of Python and switch between them on the same Oracle Linux 8 system.

To install Python and prerequisites, use the dnf module install command. Multiple versions of Python can be installed and used simultaneously on the same machine, such as Python 2.7 and Python 3.6. You can specify which version you intend to use as follows:

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The python command is not aliased by default in Oracle Linux 8. Specify the Python interpreter version with the python2 and python3 commands when you launch Python scripts.

If you need to alias the python command to fix compatibility problems with existing scripts and applications, you can set it manually. For example, to set Python 2 as the default interpreter version:

For more information about using the python command, see the python(1) manual page.

2.1В Installing Python 2

Python 2 is no longer maintained by the Python community. Oracle strongly recommends that you migrate your existing Python 2 scripts and applications to Python 3.

To learn about about the 2to3 automated migration tool visit https://docs.python.org/3/library/2to3.html. See also the porting guide at https://portingguide.readthedocs.io/en/latest/ for more in-depth information.

To install Python 2.7 on your Oracle Linux 8 system:

2.2В Installing Python 3

To install Python 3.6 on your Oracle Linux 8 system:

If you are running Oracle Linux 8.2 or later, you can optionally also install Python 3.8:

Both Python 3 modules can be installed and used simultaneously on the same machine, and you can specify which installation you intend to use as follows:

By default, the python3 command is always aliased to Python 3.6 if it is installed on the system, but you can change it manually. For example, to set Python 3.8 as the default interpreter for the python3 command:

2.3В Installing Additional Python Libraries

You can also install additional dependencies from the Oracle Linux yum server. For example, to install the requests library for Python 2, you would install the python2-requests package:

Dependencies that are installed in this way are available for any compatible Python installations on the same system. In addition, any matching packages can also be safely removed without also removing existing Python installations.

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Installing python on oracle linux

To set up an Oracle Linux instance on Oracle Cloud Infrastructure, install Python 3.6, Nginx for use as a proxy, and Gunicorn as the web server gateway interface (WSGI) server. Also upload the machine learning model that the API uses.

Other proxies and WSGI servers are available, but both Gunicorn and Nginx provide the performance thatвЂ™s needed without being over-complicated or resource-heavy.

Install Python and Additional Libraries

The default Python on Oracle Linux 7.6 and 7.7 is 2.7, but you need Python 3. Also install the Flask framework and the dependencies for the machine learning model.

Log into your Oracle Linux compute instance.
Install Python 3.6.

If your model relies on other libraries such as tensorflow or pandas, install those too.

Upload the API and the Machine Learning Model

Upload the two API files and the machine learning model to your Oracle Linux instance on Oracle Cloud Infrastructure Compute .

After uploading, run a couple of tests to make sure everything is working.

To upload and test your files:

Run the following commands in a Bash terminal on your local development system.

Use the private key that corresponds to the public key that you used when provisioning the instance.

The response should be similar to «54%» and may differ depending on how you built your model. Also, the response is displayed before the Bash prompt, as shown in the following snippet:

The response should be similar to «0.54» and may differ depending on how you built your model.

Install and Configure Gunicorn on Oracle Linux

Install and configure the Gunicorn WSGI server to start on system boot. Also configure Gunicorn to communicate with the Nginx proxy via a UNIX socket which is more efficient and secure than using a TCP/IP socket (ie, http://127.0.0.1).

To install and configure Gunicorn:

Log into your compute instance and activate the apienv environment.

The mlapi.sock file that’s specified in the ExecStart line is created in the WorkingDirectory by Gunicorn when it starts up the first time. This is the file that Gunicorn and Nginx use to communicate with each other instead of through a TCP socket.

Install and Configure Nginx on Oracle Linux

The built-in server that Flask provides is not suited for production use. To safely expose your API to the network, you should use a Python WSGI server such as Gunicorn behind a proxy such as Nginx.

Log into your compute instance.
Install Nginx from the yum repository.

Connect your Skill Bot to a Machine Learning API

The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing.

If this is software or related documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, then the following notice is applicable:

U.S. GOVERNMENT END USERS: Oracle programs, including any operating system, integrated software, any programs installed on the hardware, and/or documentation, delivered to U.S. Government end users are «commercial computer software» pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, use, duplication, disclosure, modification, and adaptation of the programs, including any operating system, integrated software, any programs installed on the hardware, and/or documentation, shall be subject to license terms and license restrictions applicable to the programs. No other rights are granted to the U.S. Government.

Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners.

Intel and Intel Xeon are trademarks or registered trademarks of Intel Corporation. All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. AMD, Opteron, the AMD logo, and the AMD Opteron logo are trademarks or registered trademarks of Advanced Micro Devices. UNIX is a registered trademark of The Open Group.

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