如何在python中解析wordpress分类数据库内容

Question

这是wordpress数据库中postmeta表中的行转储

如何在python中解析wordpress之外的数据。你知道吗

a:17:{s:13:"pa_tea-coffee";a:6:{s:4:"name";s:13:"pa_tea-coffee";s:5:"value";s:0:"";s:8:"position";s:1:"0";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:24:"pa_bottled-mineral-water";a:6:{s:4:"name";s:24:"pa_bottled-mineral-water";s:5:"value";s:0:"";s:8:"position";s:1:"1";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:17:"pa_drinking-water";a:6:{s:4:"name";s:17:"pa_drinking-water";s:5:"value";s:0:"";s:8:"position";s:1:"2";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:8:"pa_wi-fi";a:6:{s:4:"name";s:8:"pa_wi-fi";s:5:"value";s:0:"";s:8:"position";s:1:"3";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:7:"pa_cctv";a:6:{s:4:"name";s:7:"pa_cctv";s:5:"value";s:0:"";s:8:"position";s:1:"4";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:20:"pa_security-services";a:6:{s:4:"name";s:20:"pa_security-services";s:5:"value";s:0:"";s:8:"position";s:1:"5";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:27:"pa_fire_fighting_equipmment";a:6:{s:4:"name";s:27:"pa_fire_fighting_equipmment";s:5:"value";s:0:"";s:8:"position";s:1:"6";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:25:"pa_fire-alarms-sprinklers";a:6:{s:4:"name";s:25:"pa_fire-alarms-sprinklers";s:5:"value";s:0:"";s:8:"position";s:1:"7";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:21:"pa_reception-services";a:6:{s:4:"name";s:21:"pa_reception-services";s:5:"value";s:0:"";s:8:"position";s:1:"8";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:24:"pa_housekeeping-services";a:6:{s:4:"name";s:24:"pa_housekeeping-services";s:5:"value";s:0:"";s:8:"position";s:1:"9";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:17:"pa_centralized-ac";a:6:{s:4:"name";s:17:"pa_centralized-ac";s:5:"value";s:0:"";s:8:"position";s:2:"10";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:23:"pa_multiple-powerpoints";a:6:{s:4:"name";s:23:"pa_multiple-powerpoints";s:5:"value";s:0:"";s:8:"position";s:2:"11";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:23:"pa_train-station-access";a:6:{s:4:"name";s:23:"pa_train-station-access";s:5:"value";s:0:"";s:8:"position";s:2:"12";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:14:"pa_ups-back-up";a:6:{s:4:"name";s:14:"pa_ups-back-up";s:5:"value";s:0:"";s:8:"position";s:2:"13";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:20:"pa_4-wheeler-parking";a:6:{s:4:"name";s:20:"pa_4-wheeler-parking";s:5:"value";s:0:"";s:8:"position";s:2:"14";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:20:"pa_2-wheeler-parking";a:6:{s:4:"name";s:20:"pa_2-wheeler-parking";s:5:"value";s:0:"";s:8:"position";s:2:"15";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}s:17:"pa_public-parking";a:6:{s:4:"name";s:17:"pa_public-parking";s:5:"value";s:0:"";s:8:"position";s:2:"16";s:10:"is_visible";i:1;s:12:"is_variation";i:0;s:11:"is_taxonomy";i:1;}}

无法使用python-phpserialize包执行此操作

错误回溯

Traceback (most recent call last):
  File "/home/cj/projects/scripts/usageTypes.py", line 53, in <module>
    products = getProducts()
  File "/home/cj/projects/scripts/usageTypes.py", line 50, in getProducts
    products = build_product_dict(products)
  File "/home/cj/projects/scripts/usageTypes.py", line 44, in build_product_dict
    products[current_post_id]['additional_attr'][row['meta_key']]= phpserialize.unserialize(row['meta_value'])
  File "/home/cj/.vtenv/scripts/lib/python3.5/site-packages/phpserialize.py", line 521, in loads
    return load(BytesIO(data), charset, errors, decode_strings,
TypeError: a bytes-like object is required, not 'str'

Answer 1

Wordpress将其数据存储为PHP序列化数据，由于JSON，这种格式现在基本上不用了。在过去的好日子里，它一度在PHP开发人员中非常流行（提示，wordpress是一个古老的历史）。你知道吗

它之所以被废弃，是因为php序列化和非序列化存在一些安全问题，也因为JSON的兴起。然而，它仍然存在于一些应用程序中。你知道吗

使用unserialize转换为php对象

unserialize — Creates a PHP value from a stored representation

上面这些会产生如下结果：

array(17) {
  ["pa_tea-coffee"]=>
  array(6) {
    ["name"]=>
    string(13) "pa_tea-coffee"
    ["value"]=>
    string(0) ""
    ["position"]=>
    string(1) "0"
    ["is_visible"]=>
    int(1)
    ["is_variation"]=>
    int(0)
    ["is_taxonomy"]=>
    int(1)
  }
  ["pa_bottled-mineral-water"]=>
  array(6) {
    ["name"]=>
    string(24) "pa_bottled-mineral-water"
    ["value"]=>
    string(0) ""
    ["position"]=>
    string(1) "1"
    ["is_visible"]=>
    int(1)
    ["is_variation"]=>
    int(0)
    ["is_taxonomy"]=>
    int(1

如何将其转换为python，这是另一个问题，因为这不是python的固有特性。但幸运的是，有这样的模块：https://pypi.python.org/pypi/phpserialize