human
Solve the following python programming problem given the following code:
@ staticmethod 
def get_main_iface() : 
    def make_route(line) : 
        return dict (zip (['iface', 'dest'], line.split ())) 
with open ('/proc/net/route', 'r') as fp : 
        lines = fp.readlines () 
routes = [make_route (line) for line in lines [1 :]] 
    try : 
        return next ((r for r in routes if (not int (lines ['dest'], 16))), routes [0]) ['iface'] 
except (KeyError, IndexError, ValueError) : 
        raise RuntimeError ('No valid interfaces available') 

    
    

    Fix the buggy line: return next ((r for r in routes if (not int (lines ['dest'], 16))), routes [0]) ['iface']
assistant
#Here is Python code to fix the buggy line: return next ((r for r in routes if (not int (lines ['dest'], 16))), routes [0]) ['iface']
.

return next ((r for r in routes if (not int (r ['dest'], 16))), routes [0]) ['iface']