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我有一个具有初始end_date. 我有一个值错误，因为今年是闰年，我们现在是二月。

我的代码的结束日为 30，但我无法弄清楚如何编写代码来发现它是否是闰年并将初始设置end_date为正确的 2 月最后一天。

这是我的 forms.py 控制 end_date 初始值

class MaturityLetterSetupForm(forms.Form):
def __init__(self, *args, **kwargs):
    from datetime import datetime
    today = datetime.today()
    start_year = today.year
    start_month = today.month
    start_date = datetime(start_year, start_month, 1)
    try:
        end_date = datetime(start_year, start_month, 30)
    except ValueError:
        end_date = datetime(start_year, start_month, ?)

    super(MaturityLetterSetupForm, self).__init__(*args, **kwargs)
    self.fields['start_date'] = forms.DateField(initial=start_date.strftime("%B %d, %Y"),
        widget=forms.TextInput(attrs={'class':'datepicker', 'value': today }))

    self.fields['end_date'] = forms.DateField(initial=end_date.strftime("%B %d, %Y"),
        widget=forms.TextInput(attrs={'class':'datepicker', 'value': today }))

编辑 在与@Paul 交谈后，我的 init 变成了：

def __init__(self, *args, **kwargs):
    from datetime import datetime
    import calendar
    today = datetime.today()
    start_year = today.year
    start_month = today.month
    start_date = datetime(start_year, start_month, 1)
    if calendar.isleap(start_year) and today.month == 2:
        end_date = datetime(start_year, start_month, calendar.mdays[today.month]+1)
    else:
        end_date = datetime(start_year, start_month, calendar.mdays[today.month])
    super(MaturityLetterSetupForm, self).__init__(*args, **kwargs)
    self.fields['start_date'] = forms.DateField(initial=start_date.strftime("%B %d, %Y"),
        widget=forms.TextInput(attrs={'class':'datepicker', 'value': today }))

    self.fields['end_date'] = forms.DateField(initial=end_date.strftime("%B %d, %Y"),
        widget=forms.TextInput(attrs={'class':'datepicker', 'value': today }))

查找当前月份的最后一天。

4

1 回答 1

11

calendar.isleap(year)怎么样？

另外，不要使用 try/except 来处理这个，而是一个if条件。就像是：

if calendar.isleap(year):
    do_stuff
else:
   do_other_stuff
于 2012-02-03T15:41:48.567 回答