返回工作日列表，从给定的工作日开始 [英] Return a list of weekdays, starting with given weekday

问题描述

我的任务是定义一个函数工作日（工作日），该功能返回从给定工作日开始的工作日列表。它应该像这样工作：

My task is to define a function weekdays(weekday) that returns a list of weekdays, starting with the given weekday. It should work like this:

>>> weekdays('Wednesday')
['Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', 'Monday', 'Tuesday']

到目前为止，我已经提出了这一点：

So far I've come up with this one:

def weekdays(weekday):
    days = ('Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday',
            'Sunday')
    result = ""
    for day in days:
        if day == weekday:
            result += day
    return result

但这仅打印输入日期：

>>> weekdays("Sunday")
'Sunday'

我在做什么错了？

推荐答案

def weekdays(day):
    days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
    i=days.index(day) # get the index of the selected day
    d1=days[i:] #get the list from an including this index
    d1.extend(days[:i]) # append the list form the beginning to this index
    return d1

如果要测试它是否有效：

And if you want to test that it works:

def test_weekdays():
    days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
    for day in days:
        print weekdays(day)

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