定制数据范围

Question

我是python的新手，正在寻找一些帮助来创建允许用户输入自定义日期范围的函数。到目前为止，我已经完成了我的工作，但似乎无法使其正常工作。

def customised_range():
    '''Allows the user to create a customised date range'''
    print("{:=^40}".format("Date Menu"))
    start = input("Please enter a start date (DD-MM-YYYY): ")
    base = date.datetime.strptime(start, "%02d-%02d-%04d")
    if base >  date.datetime.now():
        print("Invalid input(Future Date entered)! Please try again.")
        customised_range()
    end_date = input("Please enter an end date (DD-MM-YYYY): "
    end = data.datetime.strptime(end_date, "%02d-%02d-%04d")
    if end > date.datetime.now() or end < base:
        print("Invalid input, Please try again!")
        customised_range()