Add note about external libs for datetimes

Author: jerry-git

notebooks/beginner/html/std_lib.html

@@ -11777,7 +11777,7 @@
  }
 
  $( document ).ready(function(){
- show=false;
+show=false;
  $('div.output').hide()
  });
 </script>
@@ -11848,11 +11848,11 @@ <h2 id="datetime-for-working-with-dates-and-times"><a href="https://docs.python.
 
 
 <div class="output_subarea output_stream output_stdout output_text">
-<pre>local now: 2018-05-05 09:21:55.642865
-utc now: 2018-05-05 07:21:55.643048
-2018 5 5 9 21 55
-date: 2018-05-05
-time: 09:21:55.642865
+<pre>local now: 2018-07-08 12:07:23.620463
+utc now: 2018-07-08 10:07:23.620661
+2018 7 8 12 7 23
+date: 2018-07-08
+time: 12:07:23.620463
 </pre>
 </div>
 </div>
@@ -11896,8 +11896,8 @@ <h3 id="strftime()"><code>strftime()</code><a class="anchor-link" href="#strftim
 
 
 <div class="output_subarea output_stream output_stdout output_text">
-<pre>2018/05/05-09:21:55
-date: 2018-05-05 time:09:21:55
+<pre>2018/07/08-12:07:23
+date: 2018-07-08 time:12:07:23
 </pre>
 </div>
 </div>
@@ -11984,7 +11984,7 @@ <h3 id="timedelta"><a href="https://docs.python.org/3/library/datetime.html#time
 
 
 <div class="output_subarea output_stream output_stdout output_text">
-<pre>tomorrow this time: 2018-05-06 09:21:55.642865
+<pre>tomorrow this time: 2018-07-09 12:07:23.620463
 tomorrow - now = 1 day, 0:00:00
 days: 1, seconds: 0
 total seconds: 86400.0
@@ -12029,8 +12029,6 @@ <h3 id="Working-with-timezones">Working with timezones<a class="anchor-link" hre
 
 <div class="output_subarea output_stream output_stdout output_text">
 <pre>Requirement already satisfied: pytz in /Users/jerry/.virtualenvs/learn-python3/lib/python3.5/site-packages (2018.4)
-<span class="ansi-yellow-fg">You are using pip version 10.0.0, however version 10.0.1 is available.
-You should consider upgrading via the &#39;pip install --upgrade pip&#39; command.</span>
 </pre>
 </div>
 </div>
@@ -12079,17 +12077,26 @@ <h3 id="Working-with-timezones">Working with timezones<a class="anchor-link" hre
 
 
 <div class="output_subarea output_stream output_stdout output_text">
-<pre>naive utc now: 2018-05-05 07:21:56.479642, tzinfo: None
-utc now: 2018-05-05 07:21:56.479642+00:00, tzinfo: UTC
-Paris: 2018-05-05 09:21:56.479642+02:00, tzinfo: Europe/Paris
-New York: 2018-05-05 03:21:56.479642-04:00, tzinfo: America/New_York
+<pre>naive utc now: 2018-07-08 10:07:24.490800, tzinfo: None
+utc now: 2018-07-08 10:07:24.490800+00:00, tzinfo: UTC
+Paris: 2018-07-08 12:07:24.490800+02:00, tzinfo: Europe/Paris
+New York: 2018-07-08 06:07:24.490800-04:00, tzinfo: America/New_York
 </pre>
 </div>
 </div>
 
 </div>
 </div>
 
+</div>
+<div class="cell border-box-sizing text_cell rendered"><div class="prompt input_prompt">
+</div>
+<div class="inner_cell">
+<div class="text_cell_render border-box-sizing rendered_html">
+<p><strong>NOTE</strong>: If your project uses datetimes heavily, you may want to take a look at external libraries, such as <a href="https://pendulum.eustace.io/docs/">Pendulum</a> and <a href="https://github.com/kennethreitz/maya">Maya</a>, which make working with datetimes easier for certain use cases.</p>
+
+</div>
+</div>
 </div>
 <div class="cell border-box-sizing text_cell rendered"><div class="prompt input_prompt">
 </div>
@@ -12184,8 +12191,8 @@ <h3 id="Formatting-log-entries">Formatting log entries<a class="anchor-link" hre
 
 
 <div class="output_subarea output_stream output_stderr output_text">
-<pre>2018-05-05 09:21:56,527 | MyLogger | WARNING | Something bad is going to happen
-2018-05-05 09:21:56,528 | MyLogger | ERROR | Uups, it already happened
+<pre>2018-07-08 12:07:24,540 | MyLogger | WARNING | Something bad is going to happen
+2018-07-08 12:07:24,541 | MyLogger | ERROR | Uups, it already happened
 </pre>
 </div>
 </div>
@@ -12230,8 +12237,8 @@ <h2 id="random-for-random-number-generation"><a href="https://docs.python.org/3/
 
 
 <div class="output_subarea output_stream output_stdout output_text">
-<pre>random integer between 1-100: 68
-random float between 0-1: 0.5799292152023026
+<pre>random integer between 1-100: 35
+random float between 0-1: 0.09367732583402133
 </pre>
 </div>
 </div>

notebooks/beginner/std_lib.ipynb

@@ -145,6 +145,13 @@
  "print('New York: {}, tzinfo: {}'.format(ny_now, ny_now.tzinfo))"
  ]
  },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "**NOTE**: If your project uses datetimes heavily, you may want to take a look at external libraries, such as [Pendulum](https://pendulum.eustace.io/docs/) and [Maya](https://github.com/kennethreitz/maya), which make working with datetimes easier for certain use cases."
+ ]
+ },
  {
  "cell_type": "markdown",
  "metadata": {},