layout: default
navsection: sdk
navmenu: Python
-title: "Python SDK"
-
+title: "Installation"
...
+{% comment %}
+Copyright (C) The Arvados Authors. All rights reserved.
-The Python SDK provides a generic set of wrappers so you can make API calls easily. It performs some validation before connecting to the API server: for example, it refuses to do an API call if a required parameter is missing.
+SPDX-License-Identifier: CC-BY-SA-3.0
+{% endcomment %}
-The library also includes some conveniences for use in Crunch scripts; see "Crunch utility libraries":crunch-utility-libraries.html for details.
+The Python SDK provides access from Python to the Arvados API and Keep, along with a number of command line tools for using and administering Arvados and Keep.
-h3. Installation
+h2. Installation
If you are logged in to an Arvados VM, the Python SDK should be installed.
-To use the Python SDK elsewhere, you can either install the Python SDK via PyPI or build and install the package using the arvados source tree.
+To use the Python SDK elsewhere, you can install it "from an Arvados distribution package":#package-install or "from PyPI using pip":#pip-install.
-{% include 'notebox_begin' %}
-The Python SDK requires Python 2.7
+{% include 'notebox_begin_warning' %}
+As of Arvados 3.0, the Python SDK requires Python 3.8+.
{% include 'notebox_end' %}
-h4. Option 1: install with PyPI
+h2(#package-install). Install from a distribution package
-<notextile>
-<pre>
-$ <code class="userinput">sudo apt-get install python-pip python-dev libattr1-dev libfuse-dev pkg-config python-yaml</code>
-$ <code class="userinput">sudo pip install arvados-python-client</code>
-</pre>
-</notextile>
-
-_If your version of @pip@ is 1.4 or newer, the @pip install@ command might give an error: "Could not find a version that satisfies the requirement arvados-python-client". If this happens, fix it by adding a @--pre@ flag:_
-
-<notextile>
-<pre>
-$ <code class="userinput">sudo pip install --pre arvados-python-client</code>
-</pre>
-</notextile>
+This installation method is recommended to make the CLI tools available system-wide. It can coexist with the pip installation method described below.
-h4. Option 2: build and install from source
+First, configure the "Arvados package repositories":../../install/packages.html
-<notextile>
-<pre>
-~$ <code class="userinput">sudo apt-get install python-dev libattr1-dev libfuse-dev pkg-config</code>
-~$ <code class="userinput">git clone https://github.com/curoverse/arvados.git</code>
-~$ <code class="userinput">cd arvados/sdk/python</code>
-~/arvados/sdk/python$ <code class="userinput">sudo python setup.py install</code>
-</pre>
-</notextile>
+{% assign arvados_component = 'python3-arvados-python-client' %}
-h4. Test installation
+{% include 'install_packages' %}
-If the SDK is installed and your @ARVADOS_API_HOST@ and @ARVADOS_API_TOKEN@ environment variables are set up correctly (see "api-tokens":{{site.baseurl}}/user/reference/api-tokens.html for details), @import arvados@ should produce no errors:
+The package includes a virtualenv, which means the correct Python environment needs to be loaded before the Arvados SDK can be imported. You can test the installation by doing that, then creating a client object. Ensure your "@ARVADOS_API_HOST@ and @ARVADOS_API_TOKEN@ credentials are set up correctly":{{site.baseurl}}/user/reference/api-tokens.html. Then you should be able to run the following without any errors:
<notextile>
-<pre>$ <code class="userinput">python</code>
-Python 2.7.4 (default, Sep 26 2013, 03:20:26)
-[GCC 4.7.3] on linux2
+<pre>~$ <code class="userinput">source /usr/lib/python3-arvados-python-client/bin/activate</code>
+(python-arvados-python-client) ~$ <code class="userinput">python</code>
+Python 3.7.3 (default, Jul 25 2020, 13:03:44)
+[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> <code class="userinput">import arvados</code>
>>> <code class="userinput">arvados.api('v1')</code>
</pre>
</notextile>
-h3. Examples
-
-Get the User object for the current user:
+Alternatively, you can run the Python executable inside the @virtualenv@ directly:
<notextile>
-<pre><code class="userinput">current_user = arvados.api('v1').users().current().execute()
-</code></pre>
-</notextile>
-
-Get the UUID of an object that was retrieved using the SDK:
-
-<notextile>
-<pre><code class="userinput">my_uuid = current_user['uuid']
-</code></pre>
-</notextile>
-
-Retrieve an object by ID:
-
-<notextile>
-<pre><code class="userinput">some_user = arvados.api('v1').users().get(uuid=my_uuid).execute()
-</code></pre>
-</notextile>
-
-Create an object:
-
-<notextile>
-<pre><code class="userinput">test_link = arvados.api('v1').links().create(
- body={'link_class':'test','name':'test'}).execute()
-</code></pre>
-</notextile>
-
-Update an object:
-
-<notextile>
-<pre><code class="userinput">arvados.api('v1').links().update(
- uuid=test_link['uuid'],
- body={'properties':{'foo':'bar'}}).execute()
-</code></pre>
+<pre>~$ <code class="userinput">/usr/lib/python3-arvados-python-client/bin/python</code>
+Python 3.7.3 (default, Jul 25 2020, 13:03:44)
+[GCC 8.3.0] on linux
+Type "help", "copyright", "credits" or "license" for more information.
+>>> <code class="userinput">import arvados</code>
+>>> <code class="userinput">arvados.api('v1')</code>
+<apiclient.discovery.Resource object at 0x233bb50>
+</pre>
</notextile>
-Get a list of objects:
+After you have successfully tested your installation, proceed to the the "API client overview":api-client.html and "cookbook":cookbook.html to learn how to use the SDK.
-<notextile>
-<pre><code class="userinput">repos = arvados.api('v1').repositories().list().execute()
-len(repos['items'])</code>
-2
-<code class="userinput">repos['items'][0]['uuid']</code>
-u'qr1hi-s0uqq-kg8cawglrf74bmw'
-</code></pre>
-</notextile>
+h2(#pip-install). Install from PyPI with pip
-h3. Notes
+This installation method is recommended to use the SDK in your own Python programs. If installed into a @virtualenv@, it can coexist with the system-wide installation method from a distribution package.
-The general form of an API call is:
+Note the Python SDK uses @pycurl@ which depends on the @libcurl@ C library. To build the module you may have to first install additional packages. On Debian-based distributions you can install them by running:
<notextile>
-<pre><code class="userinput">arvados.api(<i>api_version</i>).<i>plural_resource_type</i>().<i>api_method</i>(<i>parameter</i>=<i>value</i>, ...).execute()
+<pre><code># <span class="userinput">apt install git build-essential python3-dev libcurl4-openssl-dev libssl-dev</span>
</code></pre>
</notextile>
-Many API methods accept a parameter whose name is the same as the resource type. For example, @links.create@ accepts a parameter called @link@. This parameter should be given as @body@.
+Run @python3 -m pip install arvados-python-client@ in an appropriate installation environment, such as a @virtualenv@.
-<notextile>
-<pre><code class="userinput">arvados.api('v1').links().create(
- uuid=test_link['uuid'],
- body={'properties':{'foo':'bar'}}).execute()
-</code></pre>
-</notextile>
+{% include 'notebox_begin_warning' %}
+If your version of @pip@ is 1.4 or newer, the @pip install@ command might give an error: "Could not find a version that satisfies the requirement arvados-python-client". If this happens, try @python3 -m pip install --pre arvados-python-client@.
+{% include 'notebox_end' %}
-One way to make API calls slightly less verbose is:
+You can test the installation by creating a client object. Ensure your "@ARVADOS_API_HOST@ and @ARVADOS_API_TOKEN@ credentials are set up correctly":{{site.baseurl}}/user/reference/api-tokens.html. Then you should be able to run the following without any errors:
<notextile>
-<pre><code class="userinput">arv = arvados.api('v1')
-j = arv.jobs().list().execute()
-</code></pre>
+<pre>~$ <code class="userinput">python3</code>
+Python 3.7.3 (default, Jul 25 2020, 13:03:44)
+[GCC 8.3.0] on linux
+Type "help", "copyright", "credits" or "license" for more information.
+>>> <code class="userinput">import arvados</code>
+>>> <code class="userinput">arvados.api('v1')</code>
+<apiclient.discovery.Resource object at 0x233bb50>
+</pre>
</notextile>
-The SDK retrieves the list of API methods from the server at run time. Therefore, the set of available methods is determined by the server version rather than the SDK version.
-
+After you have successfully tested your installation, proceed to the the "API client overview":api-client.html and "cookbook":cookbook.html to learn how to use the SDK.
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