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| function written in Python, and the function is interpreted at runtime in an |
| isolated trusted execution environment (i.e., Intel SGX).</p> <h2 id="entrypoint"><a href="#entrypoint" class="header-anchor">#</a> Entrypoint</h2> <p>Here is an simple example of an echo function:</p> <div class="language-python extra-class"><pre class="language-text"><code>def entrypoint(argv): |
| assert argv[0] == 'message' |
| assert argv[1] is not None |
| return argv[1] |
| </code></pre></div><p>The <code>entrypoint</code> function defined above is the "entrypoint" to executing the |
| function. It takes one argument which is a list of arguments of this echo |
| function. The return value of the <code>entrypoint</code> function will be passed back to |
| the client.</p> <div class="custom-block tip"><p class="custom-block-title">NOTE</p> <p>Note that the function arguments in key-value format passed from the platform |
| are flattened into a list. For example, the <code>{"message": "Hello, Teaclave!"}</code> |
| arguments will become <code>"message"</code> (<code>argv[0]</code>) and <code>"Hello, Teaclave!"</code> |
| (<code>argv[1]</code>).</p></div> <h2 id="modules"><a href="#modules" class="header-anchor">#</a> Modules</h2> <p>Current Python executor (i.e., MesaPy) already supports many modules of the |
| original Python standard library such as <code>marshal</code>, <code>math</code>, <code>binascii</code>, |
| <code>itertools</code>, <code>micronumpy</code>. You can find a full list of available modules in the |
| <a href="https://github.com/mesalock-linux/mesapy/blob/sgx/sgx/README.md" target="_blank" rel="noopener noreferrer">document of MesaPy for SGX</a>.</p> <p>Besides these modules for general computation, you may curious about doing file |
| I/O in customized Python function. We provides APIs to integrated with the |
| executor runtime to read/write files registered along with the task. You can |
| either open a file through the <code>teaclave_open</code> function or with the <code>teaclave</code> |
| module like this:</p> <div class="language-python extra-class"><pre class="language-text"><code># open input via built-in teaclave_open |
| with teaclave_open("input_file", "rb") as f: |
| line = f.readline() |
| |
| # open input via teaclave module |
| from teaclave import open |
| with open("output_file", "wb") as f: |
| f.write("This message is from Mesapy!") |
| </code></pre></div><p>Either function will give an <code>file</code> object in Python, you can use it to read |
| lines or write data. And the first argument is the key of the registered |
| input/output files.</p> <p>You can learn more about advanced usages in the example of |
| <a href="https://github.com/apache/incubator-teaclave/tree/master/examples/python" target="_blank" rel="noopener noreferrer">logistic regression in Python</a>.</p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">6/25/2020, 1:05:37 AM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev"> |
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| My First Function |
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| Incubation is required of all newly accepted projects until a further review |
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| have stabilized in a manner consistent with other successful ASF projects. While |
| incubation status is not necessarily a reflection of the completeness or |
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| endorsed by the ASF. |
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