Mouse logger

import win32api,time

LOGFILE="mouseLog.txt"
slp=0.5
mouseLeft=1
mouseRight=2
mouseMiddle=4
counter=0
autosv=10
try:
    with open(LOGFILE) as f:
        log=f.read()
except:
    print "Log file not found, making one..."
    with open(LOGFILE,"w") as f:
        f.write("")
    log=""

try:
    while True:
        MLV = win32api.GetKeyState(mouseLeft)
        MRV = win32api.GetKeyState(mouseRight)
        MMV = win32api.GetKeyState(mouseMiddle)
        print "%s %s %s              \r"%(MLV,MMV,MRV),
        time.sleep(slp)
        counter+=1
        log+="%s: %s\t%s\t%s\n"%(time.ctime(time.time()),MLV,MMV,MRV)
        if not counter%autosv:
            with open(LOGFILE,"w") as f:
                f.write(log)
except KeyboardInterrupt:
    with open(LOGFILE,"w") as f:
        f.write(log+"***%s: Interrupted\n"%(time.ctime(time.time())))
    raise KeyboardInterrupt