如何在Python中遍历列表

Question

I have a simple for loop to iterate over a list of various dates. For each item in the list, I exclude the timezone by taking only the first 10 characters. However, when I pass the object to my template only the first value in the list is being returned for all values.

views.py

for opportunity in opportunities:
    temp = opportunity['expectedCloseDate']
    time = temp[:10]

context { 'time': time }
return render(request, 'website', context)

template.html

<div class="control is-inline-flex">
    <input class="input" name="close_date" id="close_date" type="date" value="{{ time }}" disabled>
</div>

Answer 1

You can construct a list of times :

 = opportunity['expectedCloseDate'][:10] for opportunity in opportunities
return render(request, 'website', {'times': times})

and then iterate over this in your template:

<div class="control is-inline-flex">
    {% for  in  %}
        <input class="input" name="close_date" id="close_date" type="date" value="{{ time }}" disabled>
    {% endfor %}
</div>

That being said, it looks like you are building a form manually. It is usually better to use Django's Form object [Django-doc] here.

If you want to loop concurrently over two lists, you can make use of zip , like:

times = [opportunity['expectedCloseDate'][:10] for opportunity in opportunities]
 = opportunities, times
return render(request, 'website', {'opps_times': })

and render this with:

{% for  in  %}
    <!-- ... -->
{% endfor %}

Answer 2

You are always overwriting time in each iteration. Try something like

time = []
for opportunity in opportunities:
    temp = opportunity['expectedCloseDate']
    time.append(temp[:10])

context = { 'time': time }
return render(request, 'website', context)