python - fetching list elements using jinja2 under flask app

Question

I have a list say list[a][b] of length 10. I want to print from list[0][b] to list[10][b] and use it in jinja2 template.

{% for i in test %}
<p> {{test[i][0]}} </p>
{% endfor %}

throws error:

UndefinedError: list object has no element 

Answer 1

当您迭代它时，您实际上将元素从列表中取出，而不是索引值：

{% for row in test %}
    {# Note that we subscript `row` directly,
    (rather than attempting to index `test` with `row`) #}
    <p>{{ row[0] }}</p>
{% endfor %}

Answer 2

如果您想确保始终拥有前 10 个：

{% for test in tests[0:10] %}
<p> {{ test[1] }} </p>
{% endfor %}