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Chapter 3. Python Libraries

3.1. Overview
3.2. API
3.2.1. Class Wmr
3.3. Example Usage

3.1. Overview

The Python libraries (versions 2 and 3) for WebMapReduce expect the mapper and reducer to be defined by the following functions:
function mapper(key, value)
Map the input pair composed of key and value. Both arguments are strings.
function reducer(key, values)
Reduce the intermediate values associated with key. values is an iterator that yields string values, and key is a string.
Output is given through the Wmr.emit(key, value) function.