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koushikmln/getTotalById.py

Created February 6, 2018 09:34
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getTotalById.py
from functools import reduce
def getTotalById(order_items,id):
filtered_list = filter(lambda x: int(x.split(",")[1]) == id,order_items)
subtotal = map(lambda x: float(x.split(",")[4]), filtered_list)
return reduce(lambda x,y: x + y,subtotal)
order_items = open("/data/retail_db/order_items/part-00000","r").read().splitlines()
getTotalById(order_items[:20],5)
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