python中相等值的错误比较结果

即使fib和i相等，结果也显示为False。为什么?

如果我在生成器函数中传递一个具体的值，而不是一个变量，那么结果就如预期的那样。为什么？？？

input（）默认情况下返回一个字符串，以获取数字do

int（input（））

def fib_gen(fib=-1):
 print(f"initial fib={fib}")
 a = 1
 b = 0
 yield b
 i = 1
 print(f"initial i={i}")
 while(i!=fib):#infinite sequence by default, since default value of fib is -1
  c = a
  a = a+b
  b = c
  i = i+1
  print(f"i={i}")
  print(f"fib={fib}")
  print("is fib==i: ",fib==i)
  input("Continue? ")
  yield a

x = input("First how many fibonacci numbers do you want? ")
fibs = fib_gen(x)
print(f"x={x}")
try:
 while(True):
  print(next(fibs))
except:
 print(f"That's the first {x} fibonacci numbers")

x = int(input("First how many fibonacci numbers do you want? "))