Python: What Beginners Need to Know

What is Python?

Python is a backend programming language that’s great for beginners.

Python is similar in many ways to Ruby, but is less verbose than other programming languages - a little less wordy.

Python is approachable. Even if you haven’t taken a CS class, you can still write a useful tool in Python. It’s high-level, so you don’t have to deal with the lower-level aspects of programming, such as memory management.

Python can be used for scripting, web scraping, and creating data sets. It’s popular in the scientific community for scientific computing; there are libraries that make it easy to share academic code projects in Python.

Python is a web programming language, so it interfaces with the internet. It knows how to receive and send web requests and talk to databases.

Python is said to be “loosely typed.” This category of programming languages doesn’t require you to state the type of value a function returns when you define the function or the type of variable before you create it.

The Python community is welcoming, well-maintained, and well-documented. That’s important for a beginner!

 What are the origins of Python?

In the mid-1980s a dutch fellow named Guido van Rossum was working on an educational project to build a language for new coders called ABC. As a result of working on this project, Van Rossum became interested in language design, and that’s when he started working on Python. He made some unusual decisions, which really set Python apart from the zeitgeist at that time, and continue to make the language special today.

Indentation in Python

One of Van Rossum’s decisions was to make indentation meaningful, which is unusual in programming languages. Critics who thought this would make the language hard to use didn’t receive the idea very well, but this feature is part of the reason why Python is both readable and popular. Good code style and readability is enforced by the way you have to write Python. When I first learned about indentation in Python, it struck me as a reason for the language’s success.

Encouraging responsible coding

A lot of Python’s design is about encouraging developers to make good decisions, so that Python code is more readable. Although indentation is enforced in Python, a lot of other things are not enforced, so you have to be a responsible coder to actually write good Python. Unlike Java, Python doesn’t yell at you if you call a variable or function a particular name, and it doesn’t require you to define a type.

People often describe Java as a really controlling parent, who actively prevents you from playing in the road and forcing you to stay in the house. Even though JavaScript has come a long way, it could be said that JavaScript, is the parent who is actively encouraging you to make bad choices and play in the road. Python is somewhere in the middle: the parent who says you could go play in the road, but should you? They’ll let you do it, but it’s your decision, and you have to deal with the consequences. So Python is somewhat of a, happy medium.

 Why is Python a great first coding language for beginners?

Python syntax is very similar to English, so it’s intuitive, which helps you understand what’s going on. You don't have to look up what symbols mean when you use Python. Here’s an example:

python-programming-example

Python is so readable that even if a company’s entire code base isn’t written in Python, developers tend to want to write code in Python. Hackbright mentors and alumna tell me that even if they can’t always write in Python, they try to write smaller projects, internal tools, and automation scripts in Python.

Python will be a marketable skill if you join any software engineering team because you’ll know how to create something that is well-maintained and well-received by your team.

Python programmers are among the most highly paid, which is encouraging, especially if you’re considering starting a career in software engineering.

 Which frameworks will I use with Python?

Django and Flask are the most popular web frameworks with Python.

Jupyter Notebooks are popular among scientists, folks studying machine learning, and people on the more academic side of computing in general. They let you share runnable snippets of code alongside explanations of what the code is doing.

 How do real developers use Python in their jobs?

When I ask alumni or mentors what they use Python for in their jobs, this is what I hear:

They write Python because that’s the back end language their company uses. That’s fairly common, but we do see a lot of graduates using Java, Ruby, and PHP, and others.

When companies don’t use Python for their main back end language, they might instead use Python to build scripts for deployment or other dev ops tasks, managing automation processes, cleaning up data, or migrating data from one place to another. Python is readable and fairly declarative, so it tends to be good for those one-off management tasks. Python is also a bit like super-glue – it’s good at connecting various different libraries, data sources, etc. as one cohesive tool or program.

Most big companies use Python for something. Yelp is a well-known Python shop. The creator of Python works at Dropbox, and much of Dropbox is built in Python.

Websites which use Python in some aspect:

Google

Facebook

YouTube

Pinterest

Dropbox

Spotify

Netflix

Quora

 What are the disadvantages of Python?

Python is slower than other languages. There is a trade off between how high-level and abstract a programming language, is and how efficient it is in terms of memory usage and space usage. Python is not low-level, so it’s not as fast or efficient as a compiled, lower-level language, like Java or Rust. It’s less common to use Python to build distributed database systems or other systems where speed is incredibly important.

There are also some concerns about scalability, although I know that you can make Python scalable with different implementations of the language, such as PyPy.

 What are alternatives to Python?

The most common alternative to Python is Ruby. Ruby is similar in syntax to Python that it can be hard to learn Ruby and Python one right after another. It’s almost like learning Spanish and Portuguese at the same time.

The other primary alternative in the web arena is Full Stack JavaScript. Python and JavaScript are not too similar, but they can be used for similar purposes.[Source]-https://www.coursereport.com/blog/what-is-python-programming

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