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‎20python_lbraries.html

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<div class="photo">
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<img src="img/20python_lib.png" alt="python" border="1" height="256" width="256">
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</div>
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< class="info">
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<h2>
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20 Python Libraries You Aren't Using!
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</h2>
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<h6>
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Author: Akash Singh <br/>Date: December 20, 2019
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</h6>
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<br><br>
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<p style="color:black;font-size:20px;">
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I have been using Python for quite a while now, still learning a lot of simple and
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new things. Sometimes these simple things saves time and bring a lot of joy to me. I
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will be sharing a breif overview of the book:
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<blockquote><q>20 Python Libraries You Aren't Using
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(But Should)</q> - <b>Caleb Hattingh</b></blockquote>
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<p style="color:black;font-size:20px;">This book primarily focuses on some of the lesser-known libraries from the third-party ecosystem.</p>
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<ol>Libraries</ol>
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<ul style="color:black;font-size:20px;">
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<h2>
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20 Python Libraries You Aren't Using!
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</h2>
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<h6>
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Author: Akash Singh <br/>Date: December 20, 2019
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</h6>
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<br><br>
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<p style="color:black;font-size:18px;">
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I have been using Python for quite a while now, still learning a lot of simple and
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new things. Sometimes these simple things saves time and bring a lot of joy to me. I
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will be sharing a breif overview of the book:
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<blockquote><q>20 Python Libraries You Aren't Using
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(But Should)</q> - <b>Caleb Hattingh</b></blockquote>
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<p style="color:black;font-size:px;">This book primarily focuses on some of the
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lesser-known libraries from the third-party ecosystem.</p>
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<ol style="color:black;font-size:18px;">Libraries
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<li>Standard Library</li>16
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<ul style="color:black;font-size:18px;">
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<li>collections.OrderedDict: gives you a <i>dict</i> that maintains the order of
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insertion.
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</li>
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<li>collections.defaultdict: allows you to specify a default value to all new
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keys.
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</li>
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For example:
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<pre>
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<pre>
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<code>
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>>> import collections
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>>> d = collections.defaultdict(list)
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>>> d['random_key']
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[] # output -> auto-initilized to list
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</code>
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</pre>
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<li>collections.namedtuple: namedtuple incurs no extra runtime cost and can make your much easier to read.</li>
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<li>collections.namedtuple: namedtuple incurs no extra runtime cost and can make
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your much easier to read.
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</li>
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<pre>
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<code>
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>>> point = (1.0, 2.0)
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1.0
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</code>
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</pre>
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<li>contextlib: context manager is what simplifies cleanup step. It is what you use with the <i>with</i> statement. You can use the <i>contextmanager</i> decorator from the contextlib libary to create your own context manager.</li>
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Though the default, “low level” way to make a context manager is to make a class which follows the context management protocol, by implementing <i>__enter__</i> and <i>__exit__</i> methods, the simplest way is using the contextmanager decorator from the contextlib library, and invoking yield in your context manager function in between the setup and teardown steps.
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<li>contextlib: context manager is what simplifies cleanup step. It is what you use
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with the <i>with</i> statement. You can use the <i>contextmanager</i> decorator
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from the contextlib libary to create your own context manager.
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</li>
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Though the default, “low level” way to make a context manager is to make a class
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which follows the context management protocol, by implementing <i>__enter__</i> and
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<i>__exit__</i> methods, the simplest way is using the contextmanager decorator from
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the contextlib library, and invoking yield in your context manager function in
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between the setup and teardown steps.
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<pre>
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<code>
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@contextmanager
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</code>
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</pre>
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<li>concurrent.futures: </li>
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<li>concurrent.futures:</li>
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<li>logging</li>
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<li>sched</li>
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</ul>
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<li>Command-Line Applications:</li>
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<ol>
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<li>Colorama: Allows you to use colors in your output.
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<pre>
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<img src="img/colorama.png"/>
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<a href="code/colorama_code.py">Click here to download the sample code</a>
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</pre>
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But many a times this is not our use case and we want colors in out logs. This can be achieved using library <b>colorlogs</b>.<br/>
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<img src="img/log_colors.png"/><a href="code/colorlogs_code.py">download code</a>
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</li>
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<div class="card" style="width: 60rem;">
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<div class="card-body">
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<h5 class="card-title">Special title treatment</h5>
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<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
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<a href="#" >Go somewhere</a>
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</div>
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</div> </ol>
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</ol>
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</p>
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</div>
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</p>
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</div>
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<div class="break"></div>
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</section><!-- content -->
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</div>
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<div class="break"></div>
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</section><!-- content -->
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</div>
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</div>
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<!-- End Tab Container -->
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<footer>
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<p>
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Copyright &#x000A9;&nbsp;2017 &#x000B7; Akash Singh
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</p>
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</footer>
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</div><!-- #main -->
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</div>
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<!-- End Tab Container -->
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<footer>
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<p>
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Copyright &#x000A9;&nbsp;2017 &#x000B7; Akash Singh
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</p>
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</footer>
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</div><!-- #main -->
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</div><!-- #main-container -->
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‎code/colorama_code.py

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from colorama import init, Fore, Back, Style
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init(autoreset=True) # maps ANSI color code to OS system
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messages = [
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'Colorama test case ',
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(Fore.LIGHTYELLOW_EX + Style.BRIGHT + Back.MAGENTA + 'Colored message on terminal!!!!!'),
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'Another message but not colored'
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]
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for m in messages:
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print(m)

‎code/colorlogs_code.py

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import colorlog
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logger = colorlog.getLogger()
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logger.setLevel(colorlog.colorlog.logging.DEBUG)
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handler = colorlog.StreamHandler()
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handler.setFormatter(colorlog.ColoredFormatter())
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logger.addHandler(handler)
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logger.debug('debug message')
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logger.info('information message')
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logger.warning('warning message')
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logger.error('error message')
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logger.critical('critical message')

‎img/colorama.png

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‎img/log_colors.png

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