unbound local error: local variable: referenced before assignment

[laxad]

Hi guys,

I am using django for my webapplication which is based in python.

When I am submitting a form, using views.py wihch is

def cvdetails(request, id):
  cvdb = get_object_or_404(cvdb, id=id)   <-- [B]error happening here[/B]
  if request.method == 'POST':
    f = cvform(instance=cvdb, data=request.POST)
    if f.is_valid():
      f.save()
  else:
    f = cvform(instance=cvdb)
  return render_to_response('cm/cvdetails.html', context_instance=RequestContext(request, {'form': f}))

i get this error

 
UnboundLocalError at /cm/1/cv/

local variable 'cvdb' referenced before assignment

Request Method: 	GET
Request URL: 	http://lab.cpcstrans.com/cm/1/cv/
Exception Type: 	UnboundLocalError
Exception Value: 	

local variable 'cvdb' referenced before assignment

any idea as to why this is happening?

cvdb that is being passed into get_object is globally defined. its one of my models from my app

"from portal.cm.model s import cvdb"

but i get a local error.

any suggestions would be appreciated! thankkk you

[bvdet]

This example illustrates the error:

>>> cvdb = 1
>>> def f():
... 	cvdb = str(cvdb)
... 	
>>> f()
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "<interactive input>", line 2, in f
UnboundLocalError: local variable 'cvdb' referenced before assignment
>>> def f():
... 	global cvdb
... 	cvdb = str(cvdb)
... 	return cvdb
... 
>>> f()
'1'
>>> def f():
... 	return str(cvdb)
... 
>>> f()
'1'
>>>

Use the global statement or, better, use a different variable name and access cvdb read-only, in which case Python will look outside the scope of the function.