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<h1 class="title">YEY Data Engineering</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#org5bdc9b8">1. March-April</a>
<ul>
<li><a href="#org5232628">1.1. <span class="done DONE">DONE</span> Deduplication</a>
<ul>
<li><a href="#org2a78422">1.1.1. <span class="done DONE">DONE</span> Deduplication Module</a></li>
<li><a href="#org719ad1b">1.1.2. <span class="done DONE">DONE</span> Recommender Integration</a></li>
<li><a href="#org3eb8c6f">1.1.3. <span class="done DONE">DONE</span> Deploying to production</a></li>
</ul>
</li>
<li><a href="#org6e9ffe8">1.2. <span class="done DONE">DONE</span> My Travel Plans</a>
<ul>
<li><a href="#orgde17483">1.2.1. <span class="done DONE">DONE</span> exploration of code/ideas</a></li>
<li><a href="#org2d6baa7">1.2.2. <span class="done DONE">DONE</span> implementation</a></li>
<li><a href="#orgd43ee20">1.2.3. <span class="done DONE">DONE</span> Result\Testing</a></li>
</ul>
</li>
<li><a href="#orgb9cddc6">1.3. <span class="done DONE">DONE</span> Limitations</a>
<ul>
<li><a href="#orgab2bad2">1.3.1. <span class="done DONE">DONE</span> Analysis</a></li>
<li><a href="#orgd66c21f">1.3.2. <span class="done _X_">[X]</span> Proposed solution</a></li>
<li><a href="#org5408d6d">1.3.3. <span class="done DONE">DONE</span> Implementation/Testing</a></li>
</ul>
</li>
<li><a href="#org851d2e5">1.4. <span class="done DONE">DONE</span> Subcategory Extraction</a>
<ul>
<li><a href="#orga034483">1.4.1. <span class="done DONE">DONE</span> Analysis</a></li>
<li><a href="#org86428ac">1.4.2. <span class="done DONE">DONE</span> Implementation / Testing</a></li>
<li><a href="#org7bcad4d">1.4.3. <span class="done DONE">DONE</span> Integration</a></li>
<li><a href="#orgc039a49">1.4.4. <span class="done DONE">DONE</span> Further Analysis and Report</a></li>
</ul>
</li>
<li><a href="#org10c73de">1.5. QA</a>
<ul>
<li><a href="#orge67df93">1.5.1. <span class="done DONE">DONE</span> More events than tickets</a></li>
<li><a href="#orgc2d7a92">1.5.2. <span class="done DONE">DONE</span> The Structural Exploration</a></li>
<li><a href="#org7378108">1.5.3. <span class="done DONE">DONE</span> Data</a></li>
<li><a href="#org7630496">1.5.4. <span class="done DONE">DONE</span> Go through the process</a></li>
</ul>
</li>
<li><a href="#orge535e09">1.6. Errands</a>
<ul>
<li><a href="#orgd1e257f">1.6.1. <span class="todo TODO">TODO</span> XLS file to Database</a></li>
<li><a href="#org81d6761">1.6.2. <span class="done DONE">DONE</span> cleanup branches</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#orga68ca69">2. May</a>
<ul>
<li><a href="#org88ea3bd">2.1. <span class="done DONE">DONE</span> QA</a></li>
<li><a href="#org18288af">2.2. <span class="done DONE">DONE</span> Cheapest Ticket</a></li>
<li><a href="#orgdc8f078">2.3. <span class="done DONE">DONE</span> YEY Structural Report</a></li>
<li><a href="#orgc1d835b">2.4. <span class="done DONE">DONE</span> Price Drop Detector</a></li>
<li><a href="#orgfc1b131">2.5. <span class="done DONE">DONE</span> Location Based Recommendations</a>
<ul>
<li><a href="#orgdfa169c">2.5.1. <span class="done DONE">DONE</span> Unit Testing</a></li>
</ul>
</li>
<li><a href="#orge8769b9">2.6. <span class="done DONE">DONE</span> Restructure the project</a>
<ul>
<li><a href="#orga2bf7c6">2.6.1. New Structure</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#orgf3dbe2e">3. June</a>
<ul>
<li><a href="#org7857f89">3.1. <span class="done DONE">DONE</span> System Testing: the beginning</a></li>
<li><a href="#orgc466494">3.2. <span class="done DONE">DONE</span> Dev / Prod envs</a></li>
<li><a href="#orgf8d2e9e">3.3. <span class="todo TODO">TODO</span> Small tasks</a>
<ul>
<li><a href="#orgd98869e">3.3.1. New Structure v2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-org5bdc9b8" class="outline-2">
<h2 id="org5bdc9b8"><span class="section-number-2">1</span> March-April</h2>
<div class="outline-text-2" id="text-1">
</div>
<div id="outline-container-org5232628" class="outline-3">
<h3 id="org5232628"><span class="section-number-3">1.1</span> <span class="done DONE">DONE</span> Deduplication</h3>
<div class="outline-text-3" id="text-1-1">
</div>
<div id="outline-container-org2a78422" class="outline-4">
<h4 id="org2a78422"><span class="section-number-4">1.1.1</span> <span class="done DONE">DONE</span> Deduplication Module</h4>
<div class="outline-text-4" id="text-1-1-1">
<p>
A general idea is to avoid sending duplicate events to user.<br />
Solution: finding duplicates using 3 columns: event_time, venue, city.
if data in all these these match then the event is duplicate.
</p>
</div>
<ol class="org-ol">
<li><a id="orgcc26a8d"></a><span class="done DONE">DONE</span> Preliminary Exploration/Refresh<br />
<div class="outline-text-5" id="text-1-1-1-1">
<ul class="org-ul">
<li>Created 2 new tables and the original one was renamed.<br />
I dumped the current database data to my local Postgre server.<br />
Idea in general: split yey_event into to tables -> yey_event_clean, yey_event_lookup.
<ul class="org-ul">
<li>yey_event_clean
<ul class="org-ul">
<li>original events with unique id’s and duplicate links to lookup table.<br /></li>
<li>duplicate - 1/0</li>
</ul></li>
<li>yey_event_lookup
<ul class="org-ul">
<li>lookup table for keeping a link to the rest of duplicates events per original_id.</li>
<li>original_id - index.</li>
</ul></li>
</ul></li>
</ul>
<p>
Example:
</p>
<ul class="org-ul">
<li><p>
yey_event
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-left" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">id</th>
<th scope="col" class="org-left">title</th>
<th scope="col" class="org-left">other details</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">001</td>
<td class="org-left">Pink Floyd</td>
<td class="org-left">venue, city, time - the same</td>
</tr>
<tr>
<td class="org-right">002</td>
<td class="org-left">Pink Floyd</td>
<td class="org-left">venue, city, time - the same</td>
</tr>
<tr>
<td class="org-right">…</td>
<td class="org-left"> </td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">005</td>
<td class="org-left">Led Zeppelin</td>
<td class="org-left"> </td>
</tr>
</tbody>
</table></li>
<li><p>
yey_event_clean
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-left" />
<col class="org-left" />
<col class="org-right" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">id</th>
<th scope="col" class="org-left">title</th>
<th scope="col" class="org-left">…</th>
<th scope="col" class="org-right">duplicate</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">001</td>
<td class="org-left">Pink Floyd</td>
<td class="org-left">the same details</td>
<td class="org-right">1</td>
</tr>
<tr>
<td class="org-right">005</td>
<td class="org-left">Led Zeppelin</td>
<td class="org-left">…</td>
<td class="org-right">0</td>
</tr>
</tbody>
</table></li>
<li><p>
yey_event_lookup
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-right" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">id</th>
<th scope="col" class="org-right">duplicate_id</th>
<th scope="col" class="org-left">…</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">001</td>
<td class="org-right">002</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">001</td>
<td class="org-right">003</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">001</td>
<td class="org-right">004</td>
<td class="org-left"> </td>
</tr>
</tbody>
</table></li>
</ul>
</div>
</li>
<li><a id="orgc8bc51a"></a><span class="done DONE">DONE</span> Analyse PokerNews/Airbnb<br />
<div class="outline-text-5" id="text-1-1-1-2">
<p>
Caveats:
</p>
<ul class="org-ul">
<li>PokerNews:
<ul class="org-ul">
<li>No data</li>
</ul></li>
<li>Airbnb:
<ol class="org-ol">
<li>We don’t have duplicates, for now.</li>
<li>Current solution won’t work for duplication as we have a very general data for Airbnb records: in venue [city, state], city [city], also event_time is null.</li>
</ol></li>
</ul>
</div>
</li>
<li><a id="orgf01c125"></a><span class="done DONE">DONE</span> Testing<br />
<div class="outline-text-5" id="text-1-1-1-3">
<ul class="org-ul">
<li>Details:
Some extensive refactoring and testing has been done. I’m satisfied with the current result.<br />
<ul class="org-ul">
<li><p>
SQL for extra tests:
</p>
<div class="org-src-container">
<pre class="src src-sql"> <span style="color: #859900; font-weight: bold;">SELECT</span> city,
venue,
event_time,
event_source_id,
<span style="color: #268bd2;">COUNT</span>(*)
<span style="color: #859900; font-weight: bold;">FROM</span> yey_event_clean
<span style="color: #859900; font-weight: bold;">GROUP</span> <span style="color: #859900; font-weight: bold;">BY</span> city, venue, event_time, event_source_id
<span style="color: #859900; font-weight: bold;">HAVING</span> <span style="color: #268bd2;">COUNT</span>(*) > <span style="color: #d33682; font-weight: bold;">1</span>;
</pre>
</div>
<ul class="org-ul">
<li><p>
Result
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-right" />
<col class="org-right" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-left">city</th>
<th scope="col" class="org-left">venue</th>
<th scope="col" class="org-left">event_time</th>
<th scope="col" class="org-right">event_source_id</th>
<th scope="col" class="org-right">count</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-left">Seattle</td>
<td class="org-left">Seattle, WA</td>
<td class="org-left"> </td>
<td class="org-right">5</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-left">Cincinnati</td>
<td class="org-left">Cincinnati, OH</td>
<td class="org-left"> </td>
<td class="org-right">5</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-left">San Francisco</td>
<td class="org-left">San Francisco, CA</td>
<td class="org-left"> </td>
<td class="org-right">5</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-left">New York</td>
<td class="org-left">New York, NY</td>
<td class="org-left"> </td>
<td class="org-right">5</td>
<td class="org-right">4</td>
</tr>
</tbody>
</table></li>
</ul></li>
<li><p>
So, yey_event_clean table must be a major table that will provide users with events, it’s clean = free from duplicates. We have false positives for duplicate check due to null value in event_time column for Airbnb records.
</p>
<div class="org-src-container">
<pre class="src src-sql"> <span style="color: #859900; font-weight: bold;">SELECT</span> *
<span style="color: #859900; font-weight: bold;">FROM</span> yey_event_clean
<span style="color: #859900; font-weight: bold;">WHERE</span> event_time <span style="color: #859900; font-weight: bold;">IS</span> <span style="color: #859900; font-weight: bold;">NULL</span>;
</pre>
</div>
<ul class="org-ul">
<li>Result: bunch of records from Airbnb, no duplicates though.</li>
</ul></li>
</ul></li>
</ul>
</div>
</li>
</ol>
</div>
<div id="outline-container-org719ad1b" class="outline-4">
<h4 id="org719ad1b"><span class="section-number-4">1.1.2</span> <span class="done DONE">DONE</span> Recommender Integration</h4>
<div class="outline-text-4" id="text-1-1-2">
</div>
<ol class="org-ol">
<li><a id="orgd167fe5"></a><span class="done DONE">DONE</span> Implementation/Testing<br />
<div class="outline-text-5" id="text-1-1-2-1">
<ul class="org-ul">
<li>Findings
Out of 2040 events only 640 events have corresponding tickets.</li>
<li>Dealt with recommender integration through the following fashion:
<ul class="org-ul">
<li>querying events through yey_event_clean</li>
<li>joining yey_ticket event_id on yey_event_lookup id upon querying tickets!</li>
</ul></li>
<li>outliers: somehow some events tend to differ in terms of date by 1 day, they’re obviously duplicates.</li>
</ul>
</div>
</li>
</ol>
</div>
<div id="outline-container-org3eb8c6f" class="outline-4">
<h4 id="org3eb8c6f"><span class="section-number-4">1.1.3</span> <span class="done DONE">DONE</span> Deploying to production</h4>
<div class="outline-text-4" id="text-1-1-3">
</div>
<ol class="org-ol">
<li><a id="org4c2345f"></a><span class="done DONE">DONE</span> Creating new tables<br />
<div class="outline-text-5" id="text-1-1-3-1">
<p>
yey_event_clean, yey_event_lookup
</p>
</div>
</li>
<li><a id="orga1339f0"></a><span class="done DONE">DONE</span> Integrating into the process<br />
<div class="outline-text-5" id="text-1-1-3-2">
<ul class="org-ul">
<li>unifying under a single script.</li>
</ul>
</div>
</li>
<li><a id="orgefc90ad"></a><span class="done DONE">DONE</span> Testing<br /></li>
</ol>
</div>
</div>
<div id="outline-container-org6e9ffe8" class="outline-3">
<h3 id="org6e9ffe8"><span class="section-number-3">1.2</span> <span class="done DONE">DONE</span> My Travel Plans</h3>
<div class="outline-text-3" id="text-1-2">
<p>
Decision - in case of travel destinations send 6 events from tr/destinations.
</p>
</div>
<div id="outline-container-orgde17483" class="outline-4">
<h4 id="orgde17483"><span class="section-number-4">1.2.1</span> <span class="done DONE">DONE</span> exploration of code/ideas</h4>
</div>
<div id="outline-container-org2d6baa7" class="outline-4">
<h4 id="org2d6baa7"><span class="section-number-4">1.2.2</span> <span class="done DONE">DONE</span> implementation</h4>
<div class="outline-text-4" id="text-1-2-2">
<ul class="org-ul">
<li>6 from preferred location / 6 from travel plans</li>
<li>current issues:
<ul class="org-ul">
<li>duplications eventually across the travel destinations - the same event id for 2 diff. travel destinations - gotta figure out how/why?</li>
<li>So, the most important part - figuring out how to flag or merge regular events and multiple travel destinations under the same ID:
<ul class="org-ul">
<li><p>
Should we add additional columns for each travel destination to the original table?
But it will become something like:
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-left">id</th>
<th scope="col" class="org-left">regular</th>
<th scope="col" class="org-left">state_1</th>
<th scope="col" class="org-left">city_1</th>
<th scope="col" class="org-left">start_date_1</th>
<th scope="col" class="org-left">end_date_1</th>
<th scope="col" class="org-left">state_2</th>
<th scope="col" class="org-left">city_2</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
<td class="org-left"> </td>
</tr>
</tbody>
</table>
<p>
etc.
which isn’t a good solution.
</p></li>
<li><p>
Can it be queried and merged together upon sending?
a list will be flagged as travel destination
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">id</th>
<th scope="col" class="org-left">state</th>
<th scope="col" class="org-left">city</th>
<th scope="col" class="org-left">start date</th>
<th scope="col" class="org-left">end date</th>
<th scope="col" class="org-left">travel destination</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">5</td>
<td class="org-left">MA</td>
<td class="org-left">Boston</td>
<td class="org-left">…</td>
<td class="org-left">…</td>
<td class="org-left">True</td>
</tr>
<tr>
<td class="org-right">5</td>
<td class="org-left">MA</td>
<td class="org-left">Watertown</td>
<td class="org-left">…</td>
<td class="org-left">…</td>
<td class="org-left">True</td>
</tr>
</tbody>
</table>
<p>
And upon building an email it will nicely put headlines for:
</p>
<ol class="org-ol">
<li>Events for Following destination: State/City, Date:
events</li>
<li>Another Travel destination
events</li>
<li>Preferred location
events</li>
</ol>
<p>
<b><b>So, basically the fundamental question is how does the front/email sender queries the yey_useremailqueue table?</b></b>
</p></li>
</ul></li>
</ul></li>
</ul>
</div>
</div>
<div id="outline-container-orgd43ee20" class="outline-4">
<h4 id="orgd43ee20"><span class="section-number-4">1.2.3</span> <span class="done DONE">DONE</span> Result\Testing</h4>
<div class="outline-text-4" id="text-1-2-3">
<ul class="org-ul">
<li>So, the process is implemented and works fine, just distribution of events has to be re-adjusted.</li>
<li><p>
yey_useremailqueue_tickets:
</p>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-right" />
<col class="org-right" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">id</th>
<th scope="col" class="org-right">useremailqueue_id</th>
<th scope="col" class="org-right">ticket_id</th>
<th scope="col" class="org-left">travel</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">1</td>
<td class="org-right">15</td>
<td class="org-right">738695</td>
<td class="org-left">True</td>
</tr>
<tr>
<td class="org-right">2</td>
<td class="org-right">15</td>
<td class="org-right">678910</td>
<td class="org-left">False</td>
</tr>
<tr>
<td class="org-right">3</td>
<td class="org-right">15</td>
<td class="org-right">754143</td>
<td class="org-left">…</td>
</tr>
<tr>
<td class="org-right">4</td>
<td class="org-right">15</td>
<td class="org-right">1099247</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">5</td>
<td class="org-right">15</td>
<td class="org-right">1099703</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">6</td>
<td class="org-right">15</td>
<td class="org-right">1096048</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">7</td>
<td class="org-right">17</td>
<td class="org-right">738694</td>
<td class="org-left"> </td>
</tr>
<tr>
<td class="org-right">8</td>
<td class="org-right">17</td>
<td class="org-right">754138</td>
<td class="org-left"> </td>
</tr>
</tbody>
</table>
<p>
Yes, right now I realized we need them sorted by user_id, travel [True comes first]
</p></li>
<li>Limit event to X, <br />
So, in config file we have two constants STANDARD_EVENTS_LIMIT_PER_USER and TRAVEL_EVENTS_LIMIT_PER_USER, value of both is 6 right now, as suggested. Adjusting this constant will change a number of events/tickets for each type(standard/travel) that end up in a user’s inbox.</li>
</ul>
</div>
</div>
</div>
<div id="outline-container-orgb9cddc6" class="outline-3">
<h3 id="orgb9cddc6"><span class="section-number-3">1.3</span> <span class="done DONE">DONE</span> Limitations</h3>
<div class="outline-text-3" id="text-1-3">
</div>
<div id="outline-container-orgab2bad2" class="outline-4">
<h4 id="orgab2bad2"><span class="section-number-4">1.3.1</span> <span class="done DONE">DONE</span> Analysis</h4>
<div class="outline-text-4" id="text-1-3-1">
<ul class="org-ul">
<li>How many offers a user gets on average for the same event?</li>
</ul>
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-right" />
<col class="org-right" />
<col class="org-left" />
<col class="org-right" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-right">user_id</th>
<th scope="col" class="org-right">ticket_id</th>
<th scope="col" class="org-left">email_ids</th>
<th scope="col" class="org-right">count</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-right">4</td>
<td class="org-right">5017504</td>
<td class="org-left">{3340,1712}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">4</td>
<td class="org-right">5018132</td>
<td class="org-left">{3340,1712}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">4</td>
<td class="org-right">5018175</td>
<td class="org-left">{3340,1712}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">4</td>
<td class="org-right">5019129</td>
<td class="org-left">{1712,3340}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">17</td>
<td class="org-right">5018084</td>
<td class="org-left">{2257,1715}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">17</td>
<td class="org-right">5018087</td>
<td class="org-left">{3343,2799}</td>
<td class="org-right">2</td>
</tr>
<tr>
<td class="org-right">17</td>
<td class="org-right">6001050</td>
<td class="org-left">{2799,2257}</td>
<td class="org-right">2</td>
</tr>
</tbody>
</table>