正则匹配

• 对字符串，先以";"进行分割
• 分离方向和坐标：判断方向的字符是否在['A','S','W','D']中，坐标字符是否在['0','1','2','3','4','5','6','7','8','9']中

while True:
    try:
        # 输入一行字符串
        string = input()
        lst = string.split(';')
        # 初始坐标
        x,y = 0,0
        for i in lst:
            # 分离方向和移动距离
            if len(i) < 2:
                continue
            else:
                direction = i[0]
                coordinate = i[1:]
            # 判断方向是否符合
            if direction in ['A','S','W','D']:
                # 判断坐标是否符合
                flag = True
                for j in coordinate:
                    if j in ['0','1','2','3','4','5','6','7','8','9']:
                        continue
                    else:
                        flag = False
                        break
                # 若坐标符合
                if flag:
                    # 根据不同方向移动
                    if direction == 'A':
                        x -= int(coordinate)
                    elif direction == 'D':
                        x += int(coordinate)
                    elif direction == 'W':
                        y += int(coordinate)
                    else:
                        y -= int(coordinate)
        print(str(x)+','+str(y))
    except:
        break