Apply function to sequence in chunks

process_sequence_in_chunks.py

#!/bin/env python 
import time 
from itertools import islice 
 
def process_sequence_in_chunks(fn, seq, chunk_size=100): 
    """ 
    Apply function to sequence in chunks. 
 
    Params 
    ------ 
    fn: callable 
        Function to apply. 
    seq: iterable 
        Sequence to apply function on. 
    chunk_size: int 
        Chunk size to break sequence into for function to be applied. 
    """ 
    it = iter(seq) 
    chunk = list(islice(it, chunk_size)) 
    while chunk: 
        fn(chunk) 
        time.sleep(2) 
        chunk = list(islice(it, chunk_size)) 


if __name__ == '__main__':
    process_sequence_in_chunks(print, range(200), chunk_size=60)