In -depth analysis of the technical principles of 'SAWS' Library in Python

In -depth analysis of the technical principles of SAWS libraries in Python SAWS (Simple Amazon Web Services) is an open source library based on Python, which aims to simplify interaction and management with Amazon Web Services (AWS).It provides a set of easy -to -use command line tools to help developers use AWS services and resources.This article will analyze the technical principles of SAWS libraries, including related programming code and configuration. 1. SAWS installation and configuration First, we need to install the SAWS library.You can use PIP to install through the following command: pip install saws After the installation is completed, we need to configure the AWS voucher.SAWS uses AWS vouchers to communicate with AWS services.In the process of configuration, we need to create an IAM user and allocate the necessary permissions for it.You can then configure the voucher by using AWS CLI or directly editing AWS configuration files.The following is a sample configuration file (located ~/.AWS/Config): [profile saws_profile] region = us-west-2 In this example, we created a configuration file called SAWS_PROFILE, and specified the AWS area as US-WEST-2.You can configure according to your own needs. 2. Basic usage of SAWS Once the installation and configuration are completed, we can start using the SAWS library.SAWS provides a set of simple and easy -to -use command lines that can call them by running the `SAWS` command.Here are some commonly used SAWS command examples: -` SAWS Configure`: The vouchers used to configure the SAWS connection AWS service. -` SAWS list`: List all available AWS services. -` AWS S3 LS`: List all the S3 storage barrels under the current AWS account. -` SAWS EC2 LS`: List all EC2 instances under the current AWS account. -`SAWS S3 CP <Local_path> S3: // <bucket_name>/<Object_Key>`: Copy the local file to the specified S3 bucket. 3. SAWS Technical Principles The SAWS class library uses AWS SDK for Python (BOTO3) behind the scenes to interact with AWS services.BOTO3 is the official Python SDK provided by AWS, which is used to access the API for AWS services.Saws encapsulates the function of BOTO3, making it easier and intuitive to use.Below is some key technical principles of SAWS class libraries: -Adge and permissions: SAWS uses AWS vouchers to certify and use IAM characters and strategies to manage access permissions.SAWS uses BOTO3 to establish a security connection with AWS by reading the voucher information in the AWS configuration file. -API call: SAWS uses API provided by Boto3 to call the AWS service.It encapsulates these APIs and provides more friendly and simplified command line interfaces.SAWS's command line tool is essentially a series of API calls based on BOTO3. -The results parsing and output: After the SAWS executes the API call, the result returned to the result and output it in the terminal in a readable format to the terminal.It provides rich filtering and sorting options for developers to obtain the required information as needed. 4. Complete programming code example Here are a complete Python code example using the SAWS library.This example will list all EC2 instances under the AWS account: python import saws def list_ec2_instances(): session = saws.Session(profile='saws_profile') ec2 = session.resource('ec2') instances = ec2.instances.all() for instance in instances: print('Instance ID:', instance.id) print('Instance Type:', instance.instance_type) print('Status:', instance.state['Name']) print('Public IP:', instance.public_ip_address) print('Private IP:', instance.private_ip_address) print('-----------------------------') if __name__ == '__main__': list_ec2_instances() In this example, we created a SAWS session through the `SAWS.SESSION`.Use the `Profile` parameter to specify the vouchers file we have configured before (here is saws_profile).Then, we created a resource object representing the EC2 service through the `Resource` method of the session object.You can obtain an EC2 instance through the `instances` attribute of this object. Using this example, we can easily list all EC2 instances under the AWS account and print the relevant information of the instance. Summarize: This article deeply analyzes the technical principles of SAWS libraries in Python.The SAWS class library simplifies interaction and management with AWS services by using BOTO3 SDK.We introduced the installation and configuration process of SAWS, and learned about the basic usage of SAWS and the technical principles used behind the scenes.Finally, we provide a complete Python code example to show how to use the SAWS class library to list all EC2 instances under the AWS account.By learning and using the SAWS library, developers can manage and operate AWS services and resources more conveniently.