Pass a variable in an html template in django

Question

I need to create in a html django template a form with a select dinamically created: I read values from a txt file and I store it in a dict, when I call the render to response I pass this dict but when I try to print its values in the template it doesn't print anything. This is my views:

def home(request):
 i=0
 d = {}
 with open("static/my_file.txt") as f:
 for line in f:
 key=i
 val = line.rstrip()
 d[int(key)] = val
 i=i+1
 return render_to_response('home.html', var=d)

and this is the print in the html template:

{% for val in var %}
 {{ val.value }}
{% endfor %}

Can help me?

• Rajan Chauhan: Please read docs before asking here.
• bruno desthuilliers: All you need to know to fix this (both the view and template) is extensively documented indeed. And very simple to understand too.

Answer 1

The Django documentation for for-loops in templates shows that the syntax for dicts is slightly different. Try:

{% for key, value in var.items %}
 {{ value }}
{% endfor %}

Answer 2

Try this instead of the above jinja file. If you need just values of var, and if var is dictionary, then this below code would work for you.

{% for val in var.values() %}
 {{ val }}
{% endfor %}

Answer 3

you have error in view, you need to pass context as dictionary from django.shortcuts import render

def home(request):
 i=0
 d = {}
 with open("static/my_file.txt") as f:
 for line in f:
 key=i
 val = line.rstrip()
 d[int(key)] = val
 i=i+1
 return render(request,'home.html', {'var':d})

• anonymoose: What exactly is the error? I see the same code, with the only change an import that the OP probably left out to save space.

Answer 4

If you want to pass just the variable or all variable available (local variable) in the view.py to your template just pass locals() in your case should be:

view.py:

def home(request):
 i=0
 d = {}
 with open("static/my_file.txt") as f:
 for line in f:
 key=i
 val = line.rstrip()
 d[int(key)] = val
 i=i+1
 return render('home.html', locals())

template:

{% for key,value in d.items %}
 {{ value }}
{% endfor %}