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Python

Make a dict attribute-aware

class DictAsMember(dict):
    def __getattr__(self, name):
        value = self[name]
        if isinstance(value, dict):
            value = DictAsMember(value)
        return value

# This class in action:

>>> my_dict = DictAsMember(one=1, two=2)
>>> my_dict
{'two': 2, 'one': 1}
>>> my_dict.two
2

# Edit This works recursively with sub-dictionaries, for example:

>>> my_dict = DictAsMember(one=1, two=2, subdict=dict(three=3, four=4))
>>> my_dict.one
1
>>> my_dict.subdict
{'four': 4, 'three': 3}
>>> my_dict.subdict.four
4
https://snipt.net/embed/fa1014054791779dc8f142ca31655172/
/raw/fa1014054791779dc8f142ca31655172/
fa1014054791779dc8f142ca31655172
python
Python
25
2019-06-26T15:49:56
True
False
False
Nov 01, 2012 at 07:21 AM
/api/public/snipt/45856/
make-a-dict-attribute-aware
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="k">class</span> <span class="nc">DictAsMember</span><span class="p">(</span><span class="nb">dict</span><span class="p">):</span> </span><span id="L-2"><a name="L-2"></a> <span class="k">def</span> <span class="nf">__getattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> </span><span id="L-3"><a name="L-3"></a> <span class="n">value</span> <span class="o">=</span> <span class="bp">self</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> </span><span id="L-4"><a name="L-4"></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> </span><span id="L-5"><a name="L-5"></a> <span class="n">value</span> <span class="o">=</span> <span class="n">DictAsMember</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> </span><span id="L-6"><a name="L-6"></a> <span class="k">return</span> <span class="n">value</span> </span><span id="L-7"><a name="L-7"></a> </span><span id="L-8"><a name="L-8"></a><span class="c1"># This class in action:</span> </span><span id="L-9"><a name="L-9"></a> </span><span id="L-10"><a name="L-10"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span> <span class="o">=</span> <span class="n">DictAsMember</span><span class="p">(</span><span class="n">one</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">two</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span> </span><span id="L-11"><a name="L-11"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span> </span><span id="L-12"><a name="L-12"></a><span class="p">{</span><span class="s1">&#39;two&#39;</span><span class="p">:</span> <span class="mi">2</span><span class="p">,</span> <span class="s1">&#39;one&#39;</span><span class="p">:</span> <span class="mi">1</span><span class="p">}</span> </span><span id="L-13"><a name="L-13"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span><span class="o">.</span><span class="n">two</span> </span><span id="L-14"><a name="L-14"></a><span class="mi">2</span> </span><span id="L-15"><a name="L-15"></a> </span><span id="L-16"><a name="L-16"></a><span class="c1"># Edit This works recursively with sub-dictionaries, for example:</span> </span><span id="L-17"><a name="L-17"></a> </span><span id="L-18"><a name="L-18"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span> <span class="o">=</span> <span class="n">DictAsMember</span><span class="p">(</span><span class="n">one</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">two</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">subdict</span><span class="o">=</span><span class="nb">dict</span><span class="p">(</span><span class="n">three</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">four</span><span class="o">=</span><span class="mi">4</span><span class="p">))</span> </span><span id="L-19"><a name="L-19"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span><span class="o">.</span><span class="n">one</span> </span><span id="L-20"><a name="L-20"></a><span class="mi">1</span> </span><span id="L-21"><a name="L-21"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span><span class="o">.</span><span class="n">subdict</span> </span><span id="L-22"><a name="L-22"></a><span class="p">{</span><span class="s1">&#39;four&#39;</span><span class="p">:</span> <span class="mi">4</span><span class="p">,</span> <span class="s1">&#39;three&#39;</span><span class="p">:</span> <span class="mi">3</span><span class="p">}</span> </span><span id="L-23"><a name="L-23"></a><span class="o">&gt;&gt;&gt;</span> <span class="n">my_dict</span><span class="o">.</span><span class="n">subdict</span><span class="o">.</span><span class="n">four</span> </span><span id="L-24"><a name="L-24"></a><span class="mi">4</span> </span></pre></div> </td></tr></table>
class, python, util