airflow/utils/helpers.py
def reduce_in_chunks(fn, iterable, initializer, chunk_size=0):
    """
    Reduce the given list of items by splitting it into chunks
    of the given size and passing each chunk through the reducer
    """
    if len(iterable) == 0:
        return initializer
    if chunk_size == 0:
        chunk_size = len(iterable)
    return reduce(fn, chunks(iterable, chunk_size), initializer)
def reduce_in_chunks(fn, iterable, initializer, chunk_size=0):
    if len(iterable) == 0:
        return initializer
    if chunk_size == 0:
        chunk_size = len(iterable)
    return reduce(fn, chunks(iterable, chunk_size), initializer)
def reduce_in_chunks ( fn , iterable , initializer , chunk_size = 0 ) : if len ( iterable ) == 0 : return initializer if chunk_size == 0 : chunk_size = len ( iterable ) return reduce ( fn , chunks ( iterable , chunk_size ) , initializer )
Reduce the given list of items by splitting it into chunks
    of the given size and passing each chunk through the reducer
Reduce the given list of items by splitting it into chunks of the given size and passing each chunk through the reducer