python/binarysearch.py at data-struct · YuckFu/python · GitHub

25 lines (23 loc) · 556 Bytes

def BinarySearch(l,key):

low=0

high=len(l)-1

i=0

while(low <= high):

i = i+1

mid = low + ((high-low)>>1)

if(l[mid] < key):

low = mid + 1

elif (l[mid] > key):

high = mid -1

else:

print "use %d times" % i

return mid

return -1

if __name__ == "__main__":

l=[1,4,5,6,7,8,9,44,333,2233]

print l

print BinarySearch(l,4)

print BinarySearch(l,44)

print BinarySearch(l,8)

print BinarySearch(l,2233)

print BinarySearch(l,77)

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