org.apache.beam.sdk.util

Class PythonCallableSource

java.lang.Object

org.apache.beam.sdk.util.PythonCallableSource

All Implemented Interfaces:

java.io.Serializable

public class PythonCallableSource
extends java.lang.Object
implements java.io.Serializable

A wrapper object storing a Python function definition that can be evaluated to Python callables in Python SDK.

The snippet of Python code can be a valid Python expression (such as lambda x: x * x or {str.upper}), a fully qualified name (such as math.sin), or a complete, multi-line function or class definition (such as def foo(x): ... or class Foo: ...).

Any lines preceding the function definition are first evaluated to provide context in which to define the function which can be useful to declare imports or any other needed values, e.g.

 import math

 def helper(x):
   return x * x

 def func(y):
   return helper(y) + y
 

in which case func would get applied to each element.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
java.lang.String	getPythonCallableCode()
static PythonCallableSource	of(java.lang.String pythonCallableCode)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

of

public static PythonCallableSource of(java.lang.String pythonCallableCode)

getPythonCallableCode

public java.lang.String getPythonCallableCode()