Python 为循环django模板中的列表添加限制
我只想在Django模板中打印列表中的10个元素 这是我的密码Python 为循环django模板中的列表添加限制,python,django,python-3.x,for-loop,django-templates,Python,Django,Python 3.x,For Loop,Django Templates,我只想在Django模板中打印列表中的10个元素 这是我的密码 <ul> <h3>Positive Tweets :</h3> {% for tweet in positiveTweet %} <li>{{ tweet.0 }}</li> {% endfor %} </ul> 正面推文: {对于PositiveWebet%中的tweet%} {{tweet.0} {%endfor%}
<ul>
<h3>Positive Tweets :</h3>
{% for tweet in positiveTweet %}
<li>{{ tweet.0 }}</li>
{% endfor %}
</ul>
正面推文:
{对于PositiveWebet%中的tweet%}
- {{tweet.0}
{%endfor%}
如果PositiveWebet列表的长度为100左右,我如何打印前10个元素。您可以使用
slice
来实现这一点:
<ul>
<h3>Positive Tweets :</h3>
{% for tweet in positiveTweet|slice:":10" %}
<li>{{ tweet.0 }}</li>
{% endfor %}
</ul>
正面推文:
{PositiveWebet |切片中的tweet百分比::10%}
- {{tweet.0}
{%endfor%}
类似地,请参见第10次迭代后停止处理的循环:
{% for user in users %}
{%- if loop.index >= 10 %}{% break %}{% endif %}
{%- endfor %}
loop.index以1开头,loop.index0以0开头
有关详细信息,请访问以下链接:Django的方法是在视图中的结果集上构造分页器,然后查看模板中页面的属性,有关完整详细信息,请参阅 例如,如果“我的新闻”对象可用,如下所示:
def index(request):
news = News.objects.filter(published=True).select_related('author').prefetch_related('tags')
paginator = Paginator(news, 10)
page_obj = paginator.page(request.GET.get('page', '1'))
return render(request, 'front.html', {'news': page_obj})
{% for post in news %}
<h3>{{ post.headline }}</h3>
{{ post.body }}
{% endfor %}
<nav>
<ul class="pagination">
{% if news.has_previous %}
<li>
<a href="?page={{news.previous_page_number}}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
{% endif %}
{% for p in news.paginator.page_range %}
<li class="{% if news.number == p %}active{% endif %}"><a href="?page={{p}}">{{p}}</a></li>
{% endfor %}
{% if news.has_next %}
<li>
<a href="?page={{news.next_page_number}}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
{% endif %}
</ul>
</nav>
{% for tweet in positiveTweet %}
{% if forloop.counter < 11 %}
<!-- Do your something here -->
{% endif %}
{% endfor %}
在模板中,您将获得一个页面对象,该对象一次可容纳10个项目,并具有多个有用的属性,您可以将这些属性连接到UI寻呼机中。例如,有点像这样:
def index(request):
news = News.objects.filter(published=True).select_related('author').prefetch_related('tags')
paginator = Paginator(news, 10)
page_obj = paginator.page(request.GET.get('page', '1'))
return render(request, 'front.html', {'news': page_obj})
{% for post in news %}
<h3>{{ post.headline }}</h3>
{{ post.body }}
{% endfor %}
<nav>
<ul class="pagination">
{% if news.has_previous %}
<li>
<a href="?page={{news.previous_page_number}}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
{% endif %}
{% for p in news.paginator.page_range %}
<li class="{% if news.number == p %}active{% endif %}"><a href="?page={{p}}">{{p}}</a></li>
{% endfor %}
{% if news.has_next %}
<li>
<a href="?page={{news.next_page_number}}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
{% endif %}
</ul>
</nav>
{% for tweet in positiveTweet %}
{% if forloop.counter < 11 %}
<!-- Do your something here -->
{% endif %}
{% endfor %}
{%用于新闻中的帖子%}
{{post.headline}
{{post.body}}
{%endfor%}
{%if news.has_previous%}
-
{%endif%}
{news.paginator.page_range%}
{%endfor%}
{%if news.has_next%}
-
{%endif%}
检查循环计数器,如下所示:
def index(request):
news = News.objects.filter(published=True).select_related('author').prefetch_related('tags')
paginator = Paginator(news, 10)
page_obj = paginator.page(request.GET.get('page', '1'))
return render(request, 'front.html', {'news': page_obj})
{% for post in news %}
<h3>{{ post.headline }}</h3>
{{ post.body }}
{% endfor %}
<nav>
<ul class="pagination">
{% if news.has_previous %}
<li>
<a href="?page={{news.previous_page_number}}" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
{% endif %}
{% for p in news.paginator.page_range %}
<li class="{% if news.number == p %}active{% endif %}"><a href="?page={{p}}">{{p}}</a></li>
{% endfor %}
{% if news.has_next %}
<li>
<a href="?page={{news.next_page_number}}" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
{% endif %}
</ul>
</nav>
{% for tweet in positiveTweet %}
{% if forloop.counter < 11 %}
<!-- Do your something here -->
{% endif %}
{% endfor %}
{%用于PositiveWebet%中的tweet}
{%if-forloop.counter<11%}
{%endif%}
{%endfor%}
您能告诉我如何将其添加到收件箱中吗?“收件箱”是什么意思?我想以边界清晰的格式打印这些数据,这样这些推文就必须在收件箱中