Batch indexer - a mechanism for indexing documents in batches

batch_indexer.py

class BatchIndexer(object):
    def __init__(self, batch_size):
        self.batch_size = batch_size

    def __enter__(self):
        self.batch = []
        return self

    def index(self, item):
        self.batch.append(item)
        if len(self.batch) >= self.batch_size:
            self.index_batch(self.batch)
            self.batch = []

    def index_batch(self, batch):
        print "Indexing %s" % batch
            
    def __exit__(self, *args):
        self.index_batch(self.batch)
        self.batch = []

example.txt

with BatchIndexer(10) as indexer:
    for i in range(95):
        indexer.index(i)

Indexing [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Indexing [10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
Indexing [20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
Indexing [30, 31, 32, 33, 34, 35, 36, 37, 38, 39]
Indexing [40, 41, 42, 43, 44, 45, 46, 47, 48, 49]
Indexing [50, 51, 52, 53, 54, 55, 56, 57, 58, 59]
Indexing [60, 61, 62, 63, 64, 65, 66, 67, 68, 69]
Indexing [70, 71, 72, 73, 74, 75, 76, 77, 78, 79]
Indexing [80, 81, 82, 83, 84, 85, 86, 87, 88, 89]
Indexing [90, 91, 92, 93, 94]