pymongo.py

cursor = None
rows = []
total_rows = -1
while(True):
    try:
        total_rows += 1
        row = next(cursor)
        rows.append(row)
    except bson.errors.InvalidBSON:
        logger.exception('Failed to parse document')
    except StopIteration:
        break
logger.debug('Parsed {}/{} documents from Mongo DB collection (out of a total count of {})'.format(
  cursor.retrieved,
  total_rows,
  cursor.count()
))