def lastpos(findstr,mystr):
#gp.AddMessage("查询=======:"+findstr+","+mystr)
num=len(mystr)
#gp.AddMessage("长度:"+str(num))
findnum=len(findstr)
#gp.AddMessage("长度，findnum="+str(findnum))
i=num-findnum
#gp.AddMessage("查询:i="+str(i)+",num="+str(num))
while i>0:
p=mystr.find(findstr,i,num)
#gp.AddMessage("查询:p="+str(p))
if p>0:
return p
i=i-1
def gettfh(filename): #获得图幅号
filepath=os.path.dirname(filename)
#gp.AddMessage("查询:p="+filepath)
p=lastpos("\\",filepath)
num=len(filepath);
return filepath[p+1:num]