Question

I’m trying to do a Django database save from a form where I don’t have to manually specify the fieldnames (as I do in the 2nd code block), the way I am trying to do this is as below (1st code block) as I got the tip from another S.O. post. However, when I try this I get the error “dictionary update sequence element #0 has length 4; 2 is required”, I even tried it, as below, with just a testdict dictionary, instead of the request.POST, but am still getting the error.. obviously the field value is fine since it works in the 2nd code block, so I am stumped as to why this is happening, would appreciate if anyone can shed any light on this for me… thanks

trying it this way gives the error:

testdict = {'name':'account_username','value':'vvvvvv'}
for name, value in testdict.iteritems():
    if name != '' and name != 'top_select':
         b = Twitter(**dict((name, value)))
         b.save()
>>> dictionary update sequence element #0 has length 4; 2 is required

but this works fine:

b = Twitter(account_username='vvvvvv')
b.save()

Answer 1

Not sure what you are trying to do, but maybe you want something like this

b = Twitter(**{name: value})

But to get the equivalent to Twitter(account_username='vvvvvv') you would need something like this

Twitter(**{testdict['name'], testdict['value']})

where testdict would only contain a single entity to send to Twitter()

Then the code would look more like this

test_twits = [{'name':'account_username','value':'vvvvvv'},
              {'name':'account_username','value':'wwwwww'},
              ]
for twit in test_twits:
    name = twit['name']
    value = twit['value']
    if name != '' and name != 'top_select':
         b = Twitter(**{name: value})
         b.save()