在python

Question

这是我的创建方法

def create(cls, data):
        try:
            cls.format_date_only_element(data,'start_date')
            cls.format_date_only_element(data,'end_date')            
            promotion = cls(**data)      
            promotion.save()
            return True
        except:
            return False

在上面的代码formate_date_only_element方法是

 _date_only_format = '%Y-%m-%d'
 def format_date_only_element(cls,data,date_field):        
        for r in data:        
            if date_field in r:                                
                pdate =  datetime.strptime(data[date_field], cls._date_only_format)
                data[date_field]=pdate
                break

我的创建处理程序是  def post（self）：         self__uploads =无         form = forms.CreatePromotion（self.request.POST）         count = Promotion.all（）。count（）         如果count == 0：             计数= 1         form.display_order.choices = [（item + 1，item + 1）for range in items（count）]         image = self.get_uploads（'image'）
        video = self.get_uploads（'video'）
        如果form.validate（）：             data = form.data             log.info（数据）             upload_url = blobstore.create_upload_url（'/ admin / promotion / create'）             尝试：                 datetime.strptime（data ['start_date']，'％Y-％m-％d'）                 datetime.strptime（data ['end_date']，'％Y-％m-％d'）             除了ValueError：                 self.session.add_flash（“日期格式不正确，应为YYYY-MM-DD”，key ='error'）                 return self.render_response（“/ admin / promotion / create.html”，form = form，upload_url = upload_url）

        supp_code=data['supplier_code']
        supplier_obj=SupplierMaster.get_by_code(supp_code)

        supp_code1=data['supplier_code']
        supplier_obj1=Supplier.get_by_code(supp_code1)

        if not supplier_obj and supplier_obj1 is None:
            self.session.add_flash('Supplier code does not exist',key='error')
            return self.render_response("/admin/promotion/create.html", form=form, upload_url=upload_url)

        else:
            is_video = bool(video)
            is_image = bool(image)
            if not is_image and not is_video:                
                self.session.add_flash("Please select a video or image",key='error')                
                return self.render_response("/admin/promotion/create.html", form=form, upload_url=upload_url)
            else:
                del data['video']
                del data['image']                
                if is_video:
                    if video[0].content_type.startswith('video'):
                        log.info("is video")
                        data['video'] = video[0]
                    else:
                        log.info("is_video")
                        self.session.add_flash("Please select a video or image",key='error')
                        return self.redirect("/admin/promotion/create") 
                if is_image:
                    if image[0].content_type.startswith('image'):
                        log.info("is image")
                        data['image'] = image[0]
                    else:
                        log.info("is_image")
                        self.session.add_flash("Please select a video or image",key='error')
                        return self.redirect("/admin/promotion/create")

                flag = Promotion.create(data)
                if flag is True:
                    self.session.add_flash('Promotion created successfully!',key='success')
                else:
                    self.session.add_flash("Error occured in creating Promotion",key='error')
            return self.redirect("/admin/promotions")
    else:
        upload_url = blobstore.create_upload_url('/admin/promotion/create')
        return self.render_response("/admin/promotion/create.html", form=form, upload_url=upload_url)

它给出的输出像（2015-10-29 00:00:00），但我希望我的输出只有日期而不是日期时间，提前谢谢

Answer 1

您可以在datetime对象上使用.date()来获取日期 -

pdate =  datetime.strptime(data[date_field], cls._date_only_format).date()