jerrypeng commented on a change in pull request #4725: [docs] Add
functions-develop file for Pulsar Functions(new)
URL: https://github.com/apache/pulsar/pull/4725#discussion_r303541755
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File path: site2/docs/functions-develop.md
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@@ -0,0 +1,570 @@
+---
+id: functions-develop
+title: Develop Pulsar Functions
+sidebar_label: Develop functions
+---
+
+This tutorial walks you through how to develop Pulsar Functions.
+
+## Available APIs
+In Java, Python, and Go, you have two options to write Pulsar Functions.
+
+Interface | Description | Use cases
+:---------|:------------|:---------
+Language-native interface | No Pulsar-specific libraries or special
dependencies required (only core libraries from Java/Python/Go). | Functions
that do not require access to the function [context](#context).
+Pulsar Function SDK for Java/Python/Go | Pulsar-specific libraries that
provide a range of functionality not provided by "native" interfaces. |
Functions that require access to the function [context](#context).
+
+<!--DOCUSAURUS_CODE_TABS-->
+<!--Java-->
+<!--Python-->
+In Python, the language-native function, which adds an exclamation point to
all incoming strings and publishes the resulting string to a topic, has no
external dependencies.
+
+```python
+def process(input):
+ return "{}!".format(input)
+```
+
+However, the function uses Pulsar Functions [SDK for
Python](#python-sdk-functions):
Review comment:
This sentence is a bit awkward
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