初学python 的一个语法错误

Python code

def isPrimer(d):
    tt = range(2,d^0.5)
    for i in tt
        if d%i == 0 :
            return False
        else:
            pass
    return True


count = 1
num = 3
result 
while count <= 1000:
    if isPrimer(num) == True:
        count ++
    result = num
    num += 2

print ('the 1000 primer is ' ,result)

/usr/bin/python -u "/home/fuxiang/python/prime.py"
  File "/home/fuxiang/python/prime.py", line 4
  for i in tt
   
说 这条语句有错误 ，

少了冒号

不止这一个错误吧……