9 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.
11 The library also includes some conveniences for use in Crunch scripts; see "Crunch utility libraries":crunch-utility-libraries.html for details.
15 If you are logged in to an Arvados VM, the Python SDK should be installed.
17 To use the Python SDK elsewhere, you can install from a distribution package, PyPI, or source.
19 {% include 'notebox_begin' %}
20 The Python SDK requires Python 2.7.
21 {% include 'notebox_end' %}
23 h4. Option 1: Install from distribution packages
25 First, "add the appropriate package repository for your distribution":{{ site.baseurl }}/install/install-manual-prerequisites.html#repos.
27 On Debian-based systems:
30 <pre><code>~$ <span class="userinput">sudo apt-get install python-arvados-python-client</code>
34 On Red Hat-based systems:
37 <pre><code>~$ <span class="userinput">sudo yum install python27-python-arvados-python-client</code>
41 {% include 'note_python27_sc' %}
43 h4. Option 2: Install with pip
45 Run @pip-2.7 install arvados-python-client@ in an appropriate installation environment, such as a virtualenv.
47 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 @pip-2.7 install --pre arvados-python-client@.
49 h4. Option 3: Install from source
51 Install the @python-setuptools@ package from your distribution. Then run the following:
54 <pre><code>~$ <span class="userinput">git clone https://github.com/curoverse/arvados.git</span>
55 ~$ <span class="userinput">cd arvados/sdk/python</span>
56 ~$ <span class="userinput">python2.7 setup.py install</span>
60 You may optionally run the final installation command in a virtualenv, or with the @--user@ option.
64 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:
67 <pre>~$ <code class="userinput">python2.7</code>
68 Python 2.7.4 (default, Sep 26 2013, 03:20:26)
70 Type "help", "copyright", "credits" or "license" for more information.
71 >>> <code class="userinput">import arvados</code>
72 >>> <code class="userinput">arvados.api('v1')</code>
73 <apiclient.discovery.Resource object at 0x233bb50>
79 Get the User object for the current user:
82 <pre><code class="userinput">current_user = arvados.api('v1').users().current().execute()
86 Get the UUID of an object that was retrieved using the SDK:
89 <pre><code class="userinput">my_uuid = current_user['uuid']
93 Retrieve an object by ID:
96 <pre><code class="userinput">some_user = arvados.api('v1').users().get(uuid=my_uuid).execute()
103 <pre><code class="userinput">test_link = arvados.api('v1').links().create(
104 body={'link_class':'test','name':'test'}).execute()
111 <pre><code class="userinput">arvados.api('v1').links().update(
112 uuid=test_link['uuid'],
113 body={'properties':{'foo':'bar'}}).execute()
117 Get a list of objects:
120 <pre><code class="userinput">repos = arvados.api('v1').repositories().list().execute()
121 len(repos['items'])</code>
123 <code class="userinput">repos['items'][0]['uuid']</code>
124 u'qr1hi-s0uqq-kg8cawglrf74bmw'
130 The general form of an API call is:
133 <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()
137 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@.
140 <pre><code class="userinput">arvados.api('v1').links().create(
141 uuid=test_link['uuid'],
142 body={'properties':{'foo':'bar'}}).execute()
146 One way to make API calls slightly less verbose is:
149 <pre><code class="userinput">arv = arvados.api('v1')
150 j = arv.jobs().list().execute()
154 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.