mrjob allows you to write MapReduce jobs in Python 2.5+ and run them on multiple different platforms. You can:
Write multi-step MapReduce jobs using pure Python
Test on your local machine
On a Hadoop cluster Run
Use Amazon Elastic MapReduce (EMR) to run on the cloud
The installation method of pip is very simple, no configuration is required, run directly: pip install mrjob
Code example:
from mrjob.job import MRJob
class MRWordCounter(MRJob):
def mapper(self, key, line):
for word in line.split():
yield word, 1
def reducer(self, word, occurrences):
yield word, sum(occurrences)
if __name__ == '__main__':
MRWordCounter.run()
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