有会php的朋友吗?最近看到php一个tree类,想翻译成python版本的,无奈看不懂php

  • wlxz
  • 338 次点击

这个类看起来在web开发中很好用, 希望有位会php的高手可以翻译成python版本的


<?php / 通用的树型类,可以生成任何树型结构 / class Tree { / * 生成树型结构所需要的2维数组 * @var array */ public $arr = array();

/**
* 生成树型结构所需修饰符号,可以换成图片
* @var array
*/
public $icon = array('│','├','└');
public $nbsp = "&nbsp;";

/**
* @access private
*/
public $ret = '';

/**
* 构造函数,初始化类
* @param array 2维数组,例如:
* array(
*      1 => array('id'=>'1','parent_id'=>0,'name'=>'一级栏目一'),
*      2 => array('id'=>'2','parent_id'=>0,'name'=>'一级栏目二'),
*      3 => array('id'=>'3','parent_id'=>1,'name'=>'二级栏目一'),
*      4 => array('id'=>'4','parent_id'=>1,'name'=>'二级栏目二'),
*      5 => array('id'=>'5','parent_id'=>2,'name'=>'二级栏目三'),
*      6 => array('id'=>'6','parent_id'=>3,'name'=>'三级栏目一'),
*      7 => array('id'=>'7','parent_id'=>3,'name'=>'三级栏目二')
*      )
*/
public function init($arr=array()){
   $this->arr = $arr;
   $this->ret = '';
   return is_array($arr);
}

public function get_array($parent_id=0)
{
    $arr = array();
    $rows = $this->get_child($parent_id);

    if($rows)
        foreach($rows as $k=>$v)
        {
            $v['child'] =  $this->get_array($v['menu_id']);

            $arr[] = $v;
        }

    return $arr;
}


/**
* 得到父级数组
* @param int
* @return array
*/
public function get_parent($myid){
    $newarr = array();
    if(!isset($this->arr[$myid])) return false;
    $pid = $this->arr[$myid]['parent_id'];
    $pid = $this->arr[$pid]['parent_id'];
    if(is_array($this->arr)){
        foreach($this->arr as $id => $a){
            if($a['parent_id'] == $pid) $newarr[$id] = $a;
        }
    }
    return $newarr;
}

/**
* 得到子级数组
* @param int
* @return array
*/
public function get_child($myid){
    $a = $newarr = array();
    if(is_array($this->arr)){
        foreach($this->arr as $id => $a){
            if($a['parent_id'] == $myid) $newarr[$id] = $a;
        }
    }
    return $newarr ? $newarr : false;
}

/**
* 得到当前位置数组
* @param int
* @return array
*/
public function get_pos($myid,&$newarr){
    $a = array();
    if(!isset($this->arr[$myid])) return false;
    $newarr[] = $this->arr[$myid];
    $pid = $this->arr[$myid]['parent_id'];
    if(isset($this->arr[$pid])){
        $this->get_pos($pid,$newarr);
    }
    if(is_array($newarr)){
        krsort($newarr);
        foreach($newarr as $v){
            $a[$v['id']] = $v;
        }
    }
    return $a;
}

/**
* 得到树型结构
* @param int ID,表示获得这个ID下的所有子级
* @param string 生成树型结构的基本代码,例如:"<option value=\$id \$selected>\$spacer\$name</option>"
* @param int 被选中的ID,比如在做树型下拉框的时候需要用到
* @return string
*/
public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '',$depth=0){
    $number=1;

    $depth++;
    $child = $this->get_child($myid);

    if(is_array($child)){
        $total = count($child);

        foreach($child as $id=>$a){
            $j=$k='';
            if($number==$total){
                $j .= $this->icon[2];
            }else{
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds.$j : '';
            $selected = $id==$sid ? 'selected' : '';
            extract($a);
            $parent_id == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");

            $this->ret .= $nstr;
            $nbsp = $this->nbsp;

            $this->get_tree($id, $str, $sid, $adds.$k.$nbsp,$str_group,$depth);

            $number++;
        }

    }
    return $this->ret;
}

/**
* 同上一方法类似,但允许多选
*/
public function get_tree_multi($myid, $str, $sid = 0, $adds = ''){
    $number=1;
    $child = $this->get_child($myid);
    if(is_array($child)){
        $total = count($child);
        foreach($child as $id=>$a){
            $j=$k='';
            if($number==$total){
                $j .= $this->icon[2];
            }else{
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds.$j : '';

            $selected = $this->have($sid,$id) ? 'selected' : '';
            @extract($a);
            eval("\$nstr = \"$str\";");
            $this->ret .= $nstr;
            $this->get_tree_multi($id, $str, $sid, $adds.$k.'&nbsp;');
            $number++;
        }
    }
    return $this->ret;
}
 /**
* @param integer $myid 要查询的ID
* @param string $str   第一种HTML代码方式
* @param string $str2  第二种HTML代码方式
* @param integer $sid  默认选中
* @param integer $adds 前缀
*/
public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = ''){
    $number=1;
    $child = $this->get_child($myid);
    if(is_array($child)){
        $total = count($child);
        foreach($child as $id=>$a){
            $j=$k='';
            if($number==$total){
                $j .= $this->icon[2];
            }else{
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds.$j : '';

            $selected = $this->have($sid,$id) ? 'selected' : '';
            @extract($a);
            if (empty($html_disabled)) {
                eval("\$nstr = \"$str\";");
            } else {
                eval("\$nstr = \"$str2\";");
            }
            $this->ret .= $nstr;
            $this->get_tree_category($id, $str, $str2, $sid, $adds.$k.'&nbsp;');
            $number++;
        }
    }
    return $this->ret;
}

/**
 * 同上一类方法,jquery treeview 风格,可伸缩样式(需要treeview插件支持)
 * @param $myid 表示获得这个ID下的所有子级
 * @param $effected_id 需要生成treeview目录数的id
 * @param $str 末级样式
 * @param $str2 目录级别样式
 * @param $showlevel 直接显示层级数,其余为异步显示,0为全部限制
 * @param $style 目录样式 默认 filetree 可增加其他样式如'filetree treeview-famfamfam'
 * @param $currentlevel 计算当前层级,递归使用 适用改函数时不需要用该参数
 * @param $recursion 递归使用 外部调用时为FALSE
 */
function get_treeview($myid,$effected_id='example',$str="<span class='file'>\$name</span>", $str2="<span class='folder'>\$name</span>" ,$showlevel = 0 ,$style='filetree ' , $currentlevel = 1,$recursion=FALSE) {
    $child = $this->get_child($myid);
    if(!defined('EFFECTED_INIT')){
       $effected = ' id="'.$effected_id.'"';
       define('EFFECTED_INIT', 1);
    } else {
       $effected = '';
    }
    $placeholder =  '<ul><li><span class="placeholder"></span></li></ul>';
    if(!$recursion) $this->str .='<ul'.$effected.'  class="'.$style.'">';
    foreach($child as $id=>$a) {

        @extract($a);
        if($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id)) $folder = 'hasChildren'; //如设置显示层级模式@2011.07.01
        $floder_status = isset($folder) ? ' class="'.$folder.'"' : '';
        $this->str .= $recursion ? '<ul><li'.$floder_status.' id=\''.$id.'\'>' : '<li'.$floder_status.' id=\''.$id.'\'>';
        $recursion = FALSE;
        if($this->get_child($id)){
            eval("\$nstr = \"$str2\";");
            $this->str .= $nstr;
            if($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
                $this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel+1, TRUE);
            } elseif($showlevel > 0 && $showlevel == $currentlevel) {
                $this->str .= $placeholder;
            }
        } else {
            eval("\$nstr = \"$str\";");
            $this->str .= $nstr;
        }
        $this->str .=$recursion ? '</li></ul>': '</li>';
    }
    if(!$recursion)  $this->str .='</ul>';
    return $this->str;
}

/**
 * 获取子栏目json
 * Enter description here ...
 * @param unknown_type $myid
 */
public function creat_sub_json($myid, $str='') {
    $sub_cats = $this->get_child($myid);
    $n = 0;
    if(is_array($sub_cats)) foreach($sub_cats as $c) {
        $data[$n]['id'] = iconv(CHARSET,'utf-8',$c['catid']);
        if($this->get_child($c['catid'])) {
            $data[$n]['liclass'] = 'hasChildren';
            $data[$n]['children'] = array(array('text'=>'&nbsp;','classes'=>'placeholder'));
            $data[$n]['classes'] = 'folder';
            $data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);
        } else {
            if($str) {
                @extract(array_iconv($c,CHARSET,'utf-8'));
                eval("\$data[$n]['text'] = \"$str\";");
            } else {
                $data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);
            }
        }
        $n++;
    }
    return json_encode($data);
}
private function have($list,$item){
    return(strpos(',,'.$list.',',','.$item.','));
}

} ?>

  • 1 条回复 | 1 人参与
  • wlxz # 1

    假定python数据格式如下: list = [ {'id':1, 'title':'t1', 'parent_id':0}, {'id':2, 'title':'t2', 'parent_id':0}, {'id':3, 'title':'t1_1', 'parent_id':1}, {'id':4, 'title':'t1_2', 'parent_id':1}, {'id':5, 'title':'t1_2_1', 'parent_id':4}, {'id':6, 'title':'t2_1', 'parent_id':2}, {'id':7, 'title':'t2_2', 'parent_id':2}, {'id':8, 'title':'t2_1_1', 'parent_id':6}, ]

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