在给出客户的最新记录之前，我们需要先定义一个客户记录的数据结构，例如：

class CustomerRecord:
    def __init__(self, customer_id, date, data):
        self.customer_id = customer_id
        self.date = date
        self.data = data

然后，我们可以创建一个包含客户记录的列表，并按日期降序排序：

records = [
    CustomerRecord("customer1", "2021-01-01", "data1"),
    CustomerRecord("customer2", "2021-01-03", "data2"),
    CustomerRecord("customer1", "2021-01-05", "data3"),
    CustomerRecord("customer2", "2021-01-02", "data4"),
    CustomerRecord("customer1", "2021-01-04", "data5")
]

sorted_records = sorted(records, key=lambda x: x.date, reverse=True)

接下来，我们可以使用一个字典来存储每个客户的最新记录：

latest_records = {}
for record in sorted_records:
    if record.customer_id not in latest_records:
        latest_records[record.customer_id] = record

最后，我们可以按客户ID打印出每个客户的最新记录：

for customer_id, record in latest_records.items():
    print(f"Customer ID: {customer_id}, Latest Record: {record.data}")

这样，我们就可以按日期获取每个客户的最新记录了。