如何在Python中计算多供应商的运费？

def calculate_shipping_cost(weight, size, rate):
    # 根据供应商的规则计算运费
    shipping_cost = weight * rate + size
    return shipping_cost

# 定义供应商信息
suppliers = [
    {'name': '供应商A', 'rate': 0.5},
    {'name': '供应商B', 'rate': 0.7},
    {'name': '供应商C', 'rate': 0.6}
]

# 获取用户输入的商品信息
weight = float(input('请输入商品重量（kg）：'))
size = float(input('请输入商品尺寸：'))

# 计算每个供应商的运费
shipping_costs = []
for supplier in suppliers:
    shipping_cost = calculate_shipping_cost(weight, size, supplier['rate'])
    shipping_costs.append(shipping_cost)

# 选择最低运费的供应商
min_shipping_cost = min(shipping_costs)
min_shipping_index = shipping_costs.index(min_shipping_cost)
recommended_supplier = suppliers[min_shipping_index]

print('推荐的供应商是：', recommended_supplier['name'])
print('运费为：', min_shipping_cost)