Error: “dictionary update sequence element #0 has length 1; 2 is required” on Django 1.4

Question

I have an error message on django 1.4:

dictionary update sequence element #0 has length 1; 2 is required

[EDIT]

It happe

Answer 1

Here is the reproduced error.

>>> d = {}
>>> d.update([(1,)])
Traceback (most recent call last):
  File "", line 1, in 
ValueError: dictionary update sequence element #0 has length 1; 2 is required
>>> 
>>> d
{}
>>> 
>>> d.update([(1, 2)])
>>> d
{1: 2}
>>> 
>>> d.update('hello_some_string')
Traceback (most recent call last):
File "", line 1, in   
ValueError: dictionary update sequence element #0 has length 1; 2 is required
>>> 

If you give the sequence and any element length is 1 and required two then we will get this kind of error. See the above code. First time I gave the sequence with tuple and it's length 1, then we got the error and dictionary is not updated. second time I gave inside tuple with with two elements, dictionary got updated.