有没有大牛可以解答一下以下代码错在哪。找bug找半天

Question

pnums=[]
for num in numbers:
if num < 2:
return False
elif num = 2:
pnums.append(num)
for i in range(2,num):
if num%i == 0:
break
else:
pnums.append(num)

if a == 1:
return False
a += 1
for i in range(a,b+1):
for j in range(2,i+1):
if i%j == 0:
break
if j == i:
return i

Answer 1

缩进不对，把报错那行前面去掉再用tab控制