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This page describes how gsutil uses a boto configuration file and providesa boto collaboration example.

Download files and folder from amazon s3 using boto and pytho local system - aws-boto-s3-download-directory.py. Skip to content. Instantly share code, notes, and snippets. Freewayz / aws-boto-s3-download-directory.py. Created Oct 6, 2016. Star 9 Fork 2 Code Revisions 1 Stars. Download files and folder from amazon s3 using boto and pytho.

Using boto with Cloud Storage

• When gsutil has been installed as part of the Google Cloud SDK:

  The recommended way of installing gsutil is as part of theGoogle Cloud SDK. When you do so, the boto/gsutil configuration filecontains values that control how gsutil behaves, such as which API gsutilpreferentially uses (with the prefer_api variable). These variables can bechanged by editing the file directly. The file does not containcredentials, and it does not control the default project ID, since theseare handled by the Cloud SDK.

• When gsutil has been installed as a standalone tool:

  When gsutil has been installed as a standalone tool, the boto/gsutil configuration filecontains values that control how gsutil behaves, such as which API gsutilpreferentially uses and the default project ID gsutil uses (with the prefer_apiand default_project_id variables, respectively). These variables can bechanged by editing the file directly. The file also controls credentialsand OAuth2 settings, which you typically create by using the gsutil configcommand.

The default location for the boto configuration file is in the user homedirectory, ~/.boto, for Linux and macOS, and in %HOMEDRIVE%%HOMEPATH%,for Windows. You can get the location of the configuration file by runningthe command gsutil version -l.

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You can override where the config file is used by setting the BOTO_CONFIGenvironment variable. You can also set up a path of boto config files to load bysetting the BOTO_PATH environment variable. This could be useful, for example,in data sharing and collaboration scenarios, such as theexample below.

For a complete listing of what the boto configuration filecontains, see gsutil config.

Collaboration example with boto

In this example, a small company wants to use Cloud Storage as a storagesystem for their employees. As the IT administrator, you create a project in theGoogle Cloud Platform Console and create buckets for each employee. To make it easierfor employees to use Cloud Storage, you want to create and storecompany-wide settings, such as a proxy configuration and parallel compositeupload thresholds, in a central file that employees can point to in their BOTOconfiguration path. This eliminates the need for each employee to set theshared parts of the configuration manually and allows you, as the administrator,to easily change these shared configurations if necessary.

To accomplish this, perform the following steps:

1. Create a central boto configuration file that is readable by all employees.

   This can be done by using gcloud init when gsutil is installed as partof the Google Cloud SDK.

   The boto configuration file might contain, for example:

2. Instruct employees to install the Google Cloud SDK.

   During installation, employees need to specify the project ID that thecompany is using. They also need to generate individual authentication credentialsbecause you cannot share authentication credentials centrally.

3. Instruct employees to add a BOTO_PATH environment variable.

   The BOTO_PATH environment variable lists the path of the centrally locatedconfiguration file, followed by the employee's local configuration file. Forexample, if the central configuration file is located in the directorycentralhub/, then for user jane, the BOTO_PATH environment variablemight be:

When employees run gsutil, they will automatically use the configurationspecified in the central boto file. If necessary, the administrator can changethe proxy settings, parallel composite upload threshold, and other settingsin the central configuration file and have the changes reflected for allemployees using the central configuration file.

I am trying to download a file from Amazon S3 bucket to my local using the below code but I get an error saying 'Unable to locate credentials'

Given below is the code I have written:

Could anyone help me on this. Thanks.

Python Boto S3

2 Answers

You are not using the session you created to download the file, you're using s3 client you created. If you want to use the client you need to specify credentials.

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or

For others trying to download files from AWS S3 looking for a more user-friendly solution with other industrial-strength features, check out https://github.com/d6t/d6tpipe. It abstracts the S3 functions into a simpler interface. It also supports directory sync, uploading files, permissions and many other things you need to sync files from S3 (and ftp).

Download File From S3 Using Boto

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