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 <script>window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments)}gtag("js",new Date),gtag("config","G-PBD6MS51QL")</script><script type=application/ld+json>{"@context":"http://schema.org","@type":"BlogPosting","mainEntityOfPage":{"@type":"WebPage","@id":""},"articleSection":"docs","name":"Your first Zenoh app","headline":"Your first Zenoh app","datePublished":"0001-01-01 00:00:00 \u002b0000 UTC","dateModified":"0001-01-01 00:00:00 \u002b0000 UTC","url":"\/docs\/getting-started\/first-app\/","inLanguage":"en-US","author":"","creator":"","publisher":"","accountablePerson":"","copyrightHolder":"","copyrightYear":"1011","wordCount":"489","keywords":[],"description":"Let us take a step-by-step approach in putting together your first Zenoh application in Python. As the first step, let us see how we get some data from a temperature sensor in our kitchen. Then we see how we can route this data to store and perform some analytics.\nBefore cranking some code, let\u0026rsquo;s define some terminology.\nZenoh deals with keys\/values where each key is a path and is associated to a value."}</script></header><div class="container-fluid ato-docs"><div class="row flex-xl-nowrap"><div class="col-12 col-md-3 col-xl-2 ato-sidebar"><div class="ato-search d-flex justify-content-end"><button class="btn btn-link ato-search-docs-toggle d-md-none p-0 ml-3" type=button data-toggle=collapse data-target=#ato-docs-nav aria-controls=ato-docs-nav aria-expanded=false aria-label="Toggle docs navigation"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 30" width="30" height="30" focusable="false"><title>Menu</title><path stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-miterlimit="10" d="M4 7h22M4 15h22M4 23h22"/></svg></button></div><nav class="ato-links collapse" id=ato-docs-nav><div class=ato-toc-item><a class=ato-toc-link 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Zenoh-Pico v0.5.x to Zenoh-Pico v0.6.x</a></li><li><a href=../../../docs/migration_0.5_to_0.6/migrationguide-zenohc-zenohpico/>Migrating from Zenoh-C to Zenoh-Pico (and vice-versa)</a></li></ul></div><div class=ato-toc-item><a class=ato-toc-link href=../../../docs/migration_1.0/concepts/>Migration guides v0.11 → v1.0</a><ul class="nav ato-sidenav"><li><a href=../../../docs/migration_1.0/concepts/>Concepts</a></li><li><a href=../../../docs/migration_1.0/rust/>Rust</a></li><li><a href=../../../docs/migration_1.0/c++/>C++</a></li><li><a href=../../../docs/migration_1.0/c_pico/>C / Pico</a></li><li><a href=../../../docs/migration_1.0/python/>Python</a></li><li><a href=../../../docs/migration_1.0/java/>Java</a></li><li><a href=../../../docs/migration_1.0/kotlin/>Kotlin</a></li></ul></div></nav></div><div class="d-none d-xl-block col-xl-2 ato-toc"><div class=section-nav><nav id=TableOfContents><ul><li><a href=#pubsub-in-zenoh>Pub/sub in Zenoh</a></li><li><a href=#store-and-query-in-zenoh>Store and Query in Zenoh</a></li><li><a href=#other-examples>Other examples</a></li></ul></nav></div></div><main class="col-12 col-md-9 col-xl-8 py-md-3 pl-md-5 ato-content ato-docs"><h1 class=ato-title>Your first Zenoh app</h1><div class=github-edit><a class="fa fa-github" href=https://github.com/atolab/zenoh-web/tree/master/content/docs/getting-started/first-app.md>Edit on GitHub</a></div><p>Let us take a step-by-step approach in putting together your first Zenoh application in Python.
 As the first step, let us see how we get some data from a temperature sensor in our kitchen.
 Then we see how we can route this data to store and perform some analytics.</p><p>Before cranking some code, let&rsquo;s define some terminology.</p><p>Zenoh deals with keys/values where each key is a path and is associated to a value. A key looks like just a Unix file system path, such as <code>myhome/kitchen/temp</code>. The value can be defined with different
-encodings (string, JSON, raw bytes buffer&mldr;).</p><p>Let&rsquo;s get started!</p><h2 id=pubsub-in-zenoh>Pub/sub in Zenoh</h2><p>First thing first, we need to install the <a href=https://github.com/eclipse-zenoh/zenoh-python>zenoh Python library</a>.</p><div class=highlight><pre tabindex=0 style=background-color:#f0f3f3;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style=display:flex><span>pip install eclipse-zenoh<span style=color:#555>==</span>1.0.0rc1
+encodings (string, JSON, raw bytes buffer&mldr;).</p><p>Let&rsquo;s get started!</p><h2 id=pubsub-in-zenoh>Pub/sub in Zenoh</h2><p>First thing first, we need to install the <a href=https://github.com/eclipse-zenoh/zenoh-python>zenoh Python library</a>.</p><div class=highlight><pre tabindex=0 style=background-color:#f0f3f3;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style=display:flex><span>pip install eclipse-zenoh
 </span></span></code></pre></div><p><em>The examples are updated to use the 1.0 version currently in rc, which is why version must be specified in the installation command. You can find more information about the 1.0 changes in the <a href=https://zenoh.io/docs/migration_1.0/concepts/>migration guides</a>.</em></p><p>Then, let&rsquo;s write an application, <code>z_sensor.py</code> that will produce temperature measurements at each second:</p><div class=highlight><pre tabindex=0 style=background-color:#f0f3f3;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-python data-lang=python><span style=display:flex><span><span style=color:#069;font-weight:700>import</span> <span style=color:#0cf;font-weight:700>zenoh</span><span style=color:#555>,</span> <span style=color:#0cf;font-weight:700>random</span><span style=color:#555>,</span> <span style=color:#0cf;font-weight:700>time</span>
 </span></span><span style=display:flex><span>
 </span></span><span style=display:flex><span>random<span style=color:#555>.</span>seed()