Python Program Freezes computer -

i have been programming in python little while now, , decided teach friend well. asked him make method return list of factors of number, gave me script little inefficient still looked should have worked me. when run program freezes both , computer (i have top of line gaming pc don't think using many resources). showed him how fix it, still cannot pinpoint causing problem. here code, time!

def factors(numb):     facs = []     in range(1,int(numb // 2)):         if numb % == 0:             facs.append(i)     in facs:         facs.append((numb / i))     return facs.sort() 

p.s. never throws error, after having been let run while. in python 3.4

the problem in fragment:

for in facs:         facs.append((numb / i)) 

you have self-incrementing sequence here.