Python: Binary Search Stuff

import random

values = []
def generate(samplesize,samplerange):
    for count in range(samplesize):
        nextnumber = random.randint(1,samplerange)
        values.append(nextnumber)
    #print(values)
    values.sort()
    #print(values)

def binsearch(values,number):
    found = False
    lower = 0
    upper = len(values)-1
    mid = int((upper+lower)/2)
    while not found and lower<=upper:
        mid = int((upper+lower)/2)
        #print(str(lower)+" - "+str(mid)+" - "+str(upper))
        if values[mid]>number:
            upper = mid -1
        elif values[mid]<number:
            lower = mid + 1
        else:
            found=True
    if found:
        return mid
    else:
        return -1

def locaterange(values, number):
    target = binsearch(values,number)
    if target >-1:
        lower = target
        upper = target
        found = False
        while not found:
            if lower>0:
                if values[lower-1]==values[lower]:
                    lower=lower-1
                else:
                    found=True
            else:
                found=True
        found = False
        while not found:
            if upper<len(values)-1:
                if values[upper+1]==values[upper]:
                    upper=upper+1
                else:
                    found = True
            else:
                found = True
        return[lower,upper]
    else:
        return "Not Found!"

generate(100,100)
mynumber = 100
print(binsearch(values,mynumber))
print(locaterange(values,mynumber))