319 lines
11 KiB
Python
319 lines
11 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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美国售价模型 V2 (shopfad)
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通过输入多包裹体积和采购价格，快速计算售价
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"""
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import math
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from utils.gtools import MySQLconnect
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import pandas as pd
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class USLogisticsPrice:
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"""美国物流价格查询"""
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_instance = None
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def __new__(cls):
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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cls._instance._init_data()
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return cls._instance
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def _init_data(self):
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"""从数据库加载价格数据"""
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conn = MySQLconnect('logistics')
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with conn as c:
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self.sell_usps = pd.read_sql("SELECT * FROM sell_usps", c.con)
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self.sell_uandf = pd.read_sql("SELECT * FROM sell_uandf", c.con)
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self.sell_fedex = pd.read_sql("SELECT * FROM sell_fedex", c.con)
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def get_express_fee(self, packages, profit_rate=0.359):
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"""
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计算快递费用 (尾程) - 支持多包裹
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Args:
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packages: 包裹列表, 每个元素为 dict:
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{'length_cm', 'width_cm', 'height_cm', 'weight_g'}
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profit_rate: 利润系数
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Returns:
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float: 快递费用 (USD)
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"""
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# 先遍历所有包裹确定物流类型（取最严格的）
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head_type = 0
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index = 0
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for pkg in packages:
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l, w, h, wt = pkg['length_cm'], pkg['width_cm'], pkg['height_cm'], pkg['weight_g']
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sizes = sorted([l, w, h], reverse=True)
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fst, sed, trd = sizes[0], sizes[1], sizes[2]
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vol_6000 = l * w * h / 6000
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if wt > 420:
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head_type = max(head_type, 1)
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if fst > 50 or sed > 40 or trd > 30 or wt > 2718 or vol_6000 > 3624:
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head_type = max(head_type, 2)
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if fst > 264 or wt > 67000 or vol_6000 > 95000 or (fst + sed * 2 + trd * 2) > 391:
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head_type = max(head_type, 3)
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index = 1
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if fst > 310:
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head_type = max(head_type, 4)
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index = 1
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# 逐包裹计算快递费
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sku_express_fee = 0
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sku_total_cubic_feet = 0
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ltl_over_size = 0
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ltl_over_weightfee = 0
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for pkg in packages:
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l, w, h, wt = pkg['length_cm'], pkg['width_cm'], pkg['height_cm'], pkg['weight_g']
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sizes = sorted([l, w, h], reverse=True)
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fst, sed, trd = sizes[0], sizes[1], sizes[2]
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volume = l * w * h
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vol_8500 = volume / 8500
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vol_6000 = volume / 6000
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lbs_weight = math.ceil(max(vol_8500 / 0.453, wt / 453))
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oz_weight = math.ceil(wt / 28)
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express_base_fee = 0
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oversize_charge = 0
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ahs_weight = 0
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ahs_dimension = 0
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if head_type == 0:
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try:
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row = self.sell_usps[self.sell_usps['oz'] == oz_weight]
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if len(row) > 0:
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express_base_fee = row['最终费用_v2'].iloc[0] / profit_rate
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else:
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head_type = 1
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except:
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head_type = 1
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if head_type == 1:
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try:
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row = self.sell_uandf[self.sell_uandf['lbs'] == lbs_weight]
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if len(row) > 0:
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express_base_fee = row['加权价格_v2'].iloc[0] / profit_rate
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else:
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head_type = 2
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except:
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head_type = 2
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if head_type == 2:
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try:
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row = self.sell_fedex[self.sell_fedex['lbs'] == lbs_weight]
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if len(row) > 0:
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express_base_fee = row['售价尾端价格_v3'].iloc[0]
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else:
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express_base_fee = 99999
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head_type = 3
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if fst > 238 or (fst + sed * 2 + trd * 2) > 315:
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oversize_charge = 109.4
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elif wt > 21000:
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ahs_weight = 6.1
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except:
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head_type = 3
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sku_express_fee += express_base_fee + oversize_charge + ahs_weight + ahs_dimension
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# 卡派计算
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cubic_feet = math.ceil(volume / 1000000 * 35.3147)
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sku_total_cubic_feet += cubic_feet
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if fst > 250:
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ltl_over_size = max(ltl_over_size, round(130 / profit_rate - 118, 1))
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if 111000 <= wt < 130000:
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ltl_over_weightfee = max(ltl_over_weightfee, round(80 / profit_rate - 78, 1))
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if 130000 <= wt < 157000:
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ltl_over_weightfee = max(ltl_over_weightfee, round(130 / profit_rate - 118, 1))
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# 卡派基础费用
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if sku_total_cubic_feet < 25:
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ltl_base_fee1 = round(198 / profit_rate / 2, 2)
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elif sku_total_cubic_feet < 35:
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ltl_base_fee1 = round(231 / profit_rate / 2, 2)
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else:
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ltl_base_fee1 = round(max(231, 6.6 * sku_total_cubic_feet) / profit_rate / 2, 2)
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ltl_base_fee = ltl_base_fee1 * 1.025
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ltl_fee = ltl_base_fee + ltl_over_size + ltl_over_weightfee
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if index == 0:
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return min(ltl_fee, sku_express_fee)
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else:
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return ltl_fee
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class USSellPrice:
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"""
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美国售价计算器 V2 (shopfad)
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使用示例:
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calculator = USSellPrice()
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# 单包裹
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result = calculator.calculate(
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packages=[{'length_cm': 30, 'width_cm': 20, 'height_cm': 10, 'weight_g': 500}],
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purchase_price_cny=100,
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preset='shopfad'
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)
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# 多包裹
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result = calculator.calculate(
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packages=[
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{'length_cm': 30, 'width_cm': 20, 'height_cm': 10, 'weight_g': 500},
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{'length_cm': 40, 'width_cm': 30, 'height_cm': 15, 'weight_g': 1000},
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],
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purchase_price_cny=100,
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preset='shopfad'
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)
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"""
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PRESETS = {
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'shopfad': {
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'ocean_first_cny': 0.5,
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'ocean_first_usd': 0.7,
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'air_first_usd': 0.65,
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'air_cny_type': 0.093,
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'air_first_fix': 22.7,
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'exchange_rate': 6.5,
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'profit_rate': 0.38,
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'air_rate': 0.7,
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'tax_rate': 0.1,
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'shipping_type': 1,
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'fuel_rate': 0,
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'extra_rate': 0
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},
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'shopfad2': {
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'ocean_first_cny': 1,
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'ocean_first_usd': 1,
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'air_first_usd': 0.65,
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'air_cny_type': 0.093,
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'air_first_fix': 22.7,
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'exchange_rate': 6.5,
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'profit_rate': 0.38,
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'air_rate': 0.7,
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'tax_rate': 0.145,
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'shipping_type': 1,
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'fuel_rate': 0,
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'extra_rate': 0
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},
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'shopfad3': {
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'ocean_first_cny': 0.67,
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'ocean_first_usd': 0.7,
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'air_first_usd': 0.65,
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'air_cny_type': 0.093,
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'air_first_fix': 22.7,
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'exchange_rate': 6.5,
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'profit_rate': 0.3,
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'air_rate': 0.7,
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'tax_rate': 0.1,
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'shipping_type': 1,
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'fuel_rate': 0,
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'extra_rate': 0
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}
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}
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def __init__(self):
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self.logistics = USLogisticsPrice()
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def calculate(self, packages, purchase_price_cny, preset='shopfad', config=None):
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"""
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计算售价
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Args:
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packages: 包裹列表, 每个元素为 dict:
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{'length_cm', 'width_cm', 'height_cm', 'weight_g'}
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purchase_price_cny: 采购价(CNY)
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preset: 预设配置名称
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config: 自定义配置 (优先使用)
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Returns:
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dict: 包含详细费用信息
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"""
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cfg = config or self.PRESETS.get(preset, self.PRESETS['shopfad'])
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# 汇总体积重
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total_volume_weight = sum(
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p['length_cm'] * p['width_cm'] * p['height_cm'] / 6000 for p in packages
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)
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# 尾程快递费
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fuel_rate = cfg.get('fuel_rate', 0)
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extra_rate = cfg.get('extra_rate', 0)
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express_fee = self.logistics.get_express_fee(packages, cfg['profit_rate'])
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express_fee = express_fee * (1 + fuel_rate) * (1 + extra_rate)
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purchase_price_usd = purchase_price_cny / cfg['exchange_rate']
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tax_amount = purchase_price_cny * cfg['tax_rate'] / cfg['exchange_rate']
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if cfg['shipping_type'] == 0: # 空运
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sell_price = 0
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first_cny = 0
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first_usd = 0
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for pkg in packages:
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volume = pkg['length_cm'] * pkg['width_cm'] * pkg['height_cm']
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volume_weight = volume / 6000
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density = pkg['weight_g'] / (volume / 1000) if volume > 0 else 0
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type_weight = min(337, max(37, density))
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air_first_cny = cfg['air_cny_type'] * type_weight + cfg['air_first_fix']
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air_first_cny_total = air_first_cny * volume_weight
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air_first_usd_total = cfg['air_first_usd'] * volume_weight
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sell_price += (purchase_price_usd / cfg['profit_rate'] +
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((air_first_cny_total / cfg['exchange_rate'] + air_first_usd_total +
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tax_amount) / cfg['profit_rate'] + express_fee) * cfg['air_rate'])
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first_cny += air_first_cny_total
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first_usd += air_first_usd_total
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shipping_type = '空运'
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else: # 海运
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ocean_first_cny_total = cfg['ocean_first_cny'] * total_volume_weight
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ocean_first_usd_total = cfg['ocean_first_usd'] * total_volume_weight
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sell_price = ((ocean_first_cny_total + purchase_price_cny) /
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cfg['exchange_rate'] + ocean_first_usd_total + tax_amount) / cfg['profit_rate'] + express_fee
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first_cny = ocean_first_cny_total
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first_usd = ocean_first_usd_total
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shipping_type = '海运'
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return {
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'sell_price_usd': round(sell_price, 2),
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'sell_price_cny': round(sell_price * cfg['exchange_rate'], 2),
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'purchase_price_cny': purchase_price_cny,
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'express_fee': round(express_fee, 2),
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'first_cny': round(first_cny, 2),
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'first_usd': round(first_usd, 2),
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'tax_amount': round(tax_amount, 2),
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'shipping_type': shipping_type,
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'preset': preset
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}
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if __name__ == '__main__':
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calc = USSellPrice()
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print("=== 单包裹测试 ===")
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result = calc.calculate(
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packages=[{'length_cm': 30, 'width_cm': 20, 'height_cm': 10, 'weight_g': 500}],
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purchase_price_cny=100,
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preset='shopfad'
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)
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print(f" 30x20x10cm 500g => ${result['sell_price_usd']}")
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print("\n=== 多包裹测试 ===")
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result = calc.calculate(
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packages=[
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{'length_cm': 30, 'width_cm': 20, 'height_cm': 10, 'weight_g': 500},
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{'length_cm': 40, 'width_cm': 30, 'height_cm': 15, 'weight_g': 1000},
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],
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purchase_price_cny=200,
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preset='shopfad'
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)
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print(f" 两件包裹 => ${result['sell_price_usd']}")
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print(f" 快递费: ${result['express_fee']}")
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print(f" 头程CNY: {result['first_cny']}, 头程USD: ${result['first_usd']}")
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