dt_detail.py

#!/usr/bin/env python
import collections


SG_DATA_OUT_PRICING = [
    (1, 0),
    (10*1024-1, 0.12),
    (40*1024, 0.085),
    (100*1024, 0.082),
    (350*1024, 0.080)
]


def cost_sg_data_out(usage_amount, pricing):
    pricing = collections.OrderedDict(pricing)

    if usage_amount > sum(pricing.keys()):
        raise Exception('Such large usage amount was not expected')

    total_costs = []
    remaining_amount = usage_amount

    for level_amount in pricing.keys():
        if remaining_amount > level_amount:
            remaining_amount = remaining_amount - level_amount
            total_costs.append(level_amount * pricing[level_amount])
        else:
            total_costs.append(remaining_amount * pricing[level_amount])
            break

    return sum(total_costs)