python二分法查找程序问题

tomasea

写了个折半查找的程序 总是不成功实在是找不到原因了
#!/usr/bin/python
import sys
def sercher(y):
numgroup=[1,4,5,7,8,9,13,19,20]
low=0
high=len(numgroup)-1
#mid=(low+high)/2
while(low<high):
   mid=(low+high)/2
   print "the mid is",mid
   print "the mid value is",numgroup[mid]
   guess=numgroup[mid]
   if guess == y:
    print "the number you want is",mid
    print "one"
   elif guess > y:
    high=mid-1
    print "two"
   else:
    low=mid+1
    print "three"
else:
  print "not found"
sercher(sys.argv[1])


执行[root@localhost python-script]# python midserche.py 5
the mid is 4
the mid value is 8
three
the mid is 6
the mid value is 13
three
the mid is 7
the mid value is 19
three
not found总是不成功啊

llbgurs

数字和字符串比较了

sercher(int(sys.argv[1]))

tomasea

回复 2# llbgurs


    大侠指教一下 应该如何改呢 刚开始学习python

tomasea

回复 2# llbgurs


    哦 看到了 谢谢大侠指教啊