Python报错can't convert complex to int

Question

for i in range((x+1)2):
if i0.5 == int(i**0.5) and (i-168)0.5 == int((i-168)0.5):
print(i-100)
这段代码、报错line 8, in
if i0.5 == int(i0.5) and (i-168)**0.5 == int((i-168)**0.5):
TypeError: can't convert complex to int
如果i-168改成i+168就没事，成功运行。这是为什么？

Answer 1

因为i很小时 你减去168是负数，负数无法开方