Make dictionary from list with python

Question

I need to transform a list into dictionary as follows. The odd elements has the key, and even number elements has the value.

x = (1,'a',2,'b',3,'c') -> {1: 'a', 2: 'b', 3: 'c'}

def set(self, val_): 
        i = 0 
        for val in val_: 
            if i == 0: 
                i = 1 
                key = val 
            else: 
                i = 0 
                self.dict[key] = val 

My solution seems to long, is there a better way to get the same results?

== ADDED ==

i = iter(k)
print dict(zip(i,i))

seems to be working

Answer 1

x = (1,'a',2,'b',3,'c') 
d = dict(x[n:n+2] for n in xrange(0, len(x), 2))
print d

Answer 2

dict(x[i:i+2] for i in range(0, len(x), 2))

Answer 3

dict(zip(*[iter(val_)] * 2))

Answer 4

Here are a couple of ways for Python3 using dict comprehensions

>>> x = (1,'a',2,'b',3,'c')
>>> {k:v for k,v in zip(*[iter(x)]*2)}
{1: 'a', 2: 'b', 3: 'c'}
>>> {x[i]:x[i+1] for i in range(0,len(x),2)}
{1: 'a', 2: 'b', 3: 'c'}

Answer 5

>>> x=(1,'a',2,'b',3,'c')
>>> dict(zip(x[::2],x[1::2]))
{1: 'a', 2: 'b', 3: 'c'}