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Advanced Concepts in Python

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An Intro to Argument Parsing using argparse

How To Process Command Line Arguments?Adding Arguments Options That Conflict

The collections module

Collections Module in Python Counter defaultdict deque namedtuple OrderedDict Quiz Yourself on Collections Module

Context Managers

Context Manager and Contextlib in Python Contextlib and Its Classes ExitStack and Reentrant Context Managers

The functools module

Introduction to functools functool.partial Function Overloading with functools.singledispatch functools.wraps Quiz Yourself on Functools Module

All About Imports

Introduction To Imports

Using "from module import something"

Relative Imports

Optional and Local Imports

Import Pitfalls

Quiz Yourself on Python Imports

The importlib Module

importlib Package Dynamic Imports Module Import Checking Import From Source File Import from github.com

Iterators and Generators

Introduction to Iterators Creating Our Own Iterators Generators Quiz Yourself on Iterators and Generators

The itertools Module

Iterators Iterators That Terminate compress(), dropwhile() and filterfalse()groupby(), islice() and starmap()takewhile(), tee() and zip_longest()The Combinatoric Generators Quiz Yourself on the Iterators Module

Regular Expressions

Introduction to Regular expressions The Matching Characters Pattern Matching Using Search and Escape Codes Compiling Compilation Flags Finding Multiple Instances Backslashes Are Complicated Quiz Yourself on Regular Expressions

The typing Module

Introduction to Typing Module Type Hints and Overloaded Functions

Python Built-ins

Introduction to Built-ins enumerate and eval filter and map zip Quiz Yourself on Python Built-ins

Unicode

Introduction to Unicode Encoding / Decoding

Benchmarking

Introduction to Benchmarking Use a decorator cProfile line_profiler memory_profiler profilehooks Quiz Yourself on Benchmarking

Encryption and Cryptography

Introduction to Encryption and Cryptography Key Derivation PyCrypto The Cryptography Package

Databases

Introduction to Databases in Python pyodbc and pypyodbc MySQL PostgreSQL Object Relational Mappers NoSQL and MongoDB Quiz Yourself on Databases

The super built-in

Introduction to Super Built-in Python 2 vs. Python 3 Method Resolution Order (MRO)Quiz Yourself on Super Built-in

Descriptors

Descriptors in Python and its Protocol Descriptor Examples

Scope

Scope in Python Local Scope Global Scope nonlocal Scope Quiz Yourself on Scope in Python

Web Scraping

Introduction to Web Scraping Preparing to Scrape BeautifulSoup Scrapy Quiz Yourself on Web Scraping

Web APIs

Introduction to APIs Twitter Reddit Wikipedia Other API Libraries

Working with FTP

Introduction to FTP and ftplib Downloading and Uploading a File via FTP

The urllib Module

urllib module in Python urllib.request urllib.parse urllib.robotparser Quiz Yourself on urllib Module

The doctest Module

Introduction to doctest Module Working of doctest Module Check Your Test With a Text File Option Flags and Directives Quiz Yourself on doctest Module

The unittest Module

unittest Module in Python A Simple Example of unittest Module Command-Line Interface Creating a More Complex Test Creating Test Suites How to Skip Tests Integrating with doctest Quiz Yourself on unittest Module

The mock Module

mock module in Python Simple Examples of mock Module Side Effects of mock Module Autospeccing and Patch Quiz Yourself on mock Module

An Intro to coverage.py

Coverage.py Additional Information

The asyncio Module

Introduction to asyncio Module async and await A Bad Coroutine Example A Better Coroutine Example Scheduling Calls Tasks Quiz Yourself on asyncio Module

The threading Module

Introduction to Threading Module Locks and Synchronization Timers Other Thread Components Thread Communication Quiz Yourself on Threading Module

The multiprocessing Module

Multiprocessing in Python Locks and Logging The Pool Class Process Communication Quiz Yourself on Multiprocessing Module

The concurrent.futures Module

concurrent.futures module Creating a Pool Deadlocks

Conclusion

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Using "from module import something"

Using "from module import something"

Let's talk about how we can import something from the module and how it works.

How can we import a module in Python?

There are many times when we just want to import part of a module or library.

Let’s see how Python accomplishes this:

Press + to interact

from functools import lru_cache

What the code above does is allow us to call lru_cache directly. If we had imported just functools the normal way, then we would have to call lru_cache using something like ...