python 为什么我的Astart比别人的丑

import math
wall=tuple([(4,2),(4,3),(4,4),(4,5),(4,6),(4,7)]) #定义墙的坐标
openlist=list()
closelist=list()
parent=dict()
GH=dict()

def Probe(sx,sy,dx,dy):
    closelist.append((sx,sy))
    if (sx+1,sy) not in wall and ((sx+1,sy) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx-1)**2 + (dy-sy)**2))
        if sum(GH.get((sx+1,sy),(100000,100)))>sum(gh):
            GH[(sx+1,sy)]=gh
            openlist.append((sx+1,sy))
            parent[(sx+1,sy)]=(sx,sy)
    if (sx-1,sy) not in wall and ((sx-1,sy) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx+1)**2 + (dy-sy)**2))
        if sum(GH.get((sx-1,sy),(100000,100)))>sum(gh):
            GH[(sx-1,sy)]=gh
            openlist.append((sx-1,sy))
            parent[(sx-1,sy)]=(sx,sy)
    if (sx,sy+1) not in wall and ((sx,sy+1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx)**2 + (dy-sy-1)**2))
        if sum(GH.get((sx,sy+1),(100000,100)))>sum(gh):
            GH[(sx,sy+1)]=gh
            openlist.append((sx,sy+1))
            parent[(sx,sy+1)]=(sx,sy)
    if (sx,sy-1) not in wall and ((sx,sy-1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx)**2 + (dy-sy+1)**2))
        if sum(GH.get((sx,sy-1),(100000,100)))>sum(gh):
            GH[(sx,sy-1)]=gh
            openlist.append((sx,sy-1))
            parent[(sx,sy-1)]=(sx,sy)
    if (sx+1,sy+1) not in wall and ((sx+1,sy+1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx-1)**2 + (dy-sy-1)**2))
        if sum(GH.get((sx+1,sy+1),(100000,100)))>sum(gh):
            GH[(sx+1,sy+1)]=gh
            openlist.append((sx+1,sy+1))
            parent[(sx+1,sy+1)]=(sx,sy)
    if (sx+1,sy-1) not in wall and ((sx+1,sy-1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx-1)**2 + (dy-sy+1)**2))
        if sum(GH.get((sx+1,sy-1),(100000,100)))>sum(gh):
            GH[(sx+1,sy-1)]=gh
            openlist.append((sx+1,sy-1))
            parent[(sx+1,sy-1)]=(sx,sy)
    if (sx-1,sy+1) not in wall and ((sx-1,sy+1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx+1)**2 + (dy-sy-1)**2))
        if sum(GH.get((sx-1,sy+1),(100000,100)))>sum(gh):
            GH[(sx-1,sy+1)]=gh
            openlist.append((sx-1,sy+1))
            parent[(sx-1,sy+1)]=(sx,sy)
    if (sx-1,sy-1) not in wall and ((sx-1,sy-1) not in closelist):
        gh=((GH.get((sx,sy),(1,1)))[0],math.sqrt((dx-sx+1)**2 + (dy-sy+1)**2))
        if sum(GH.get((sx-1,sy-1),(100000,100)))>sum(gh):
            GH[(sx-1,sy-1)]=gh
            openlist.append((sx-1,sy-1))
            parent[(sx-1,sy-1)]=(sx,sy)
    if (dx,dy) in openlist: return
    sortlist=sorted(openlist,key=lambda d:sum(GH[d]))
    sortlist=sortlist[0]
    openlist.remove(sortlist)
    Probe(sortlist[0],sortlist[1],dx,dy)

def search(sx,sy,dx,dy):
    if (dx,dy)==(sx,sy) : return
    search(sx,sy,parent[(dx,dy)][0],parent[(dx,dy)][1])
    print('node %d,%d -> %d,%d'%(parent[(dx,dy)][0],parent[(dx,dy)][1],dx,dy))

Probe(1,1,5,4) # 探测路线
search(1,1,5,4) #打印路线

图片形式：橙色代表走的路线