Why Python is One of the Most Preferred Languages for Data Science?

Why do most data scientists love Python? Learn more about how so many well-developed Python packages can help you accomplish your crucial data science tasks.

By Poli Dey Bhavsar, Content Writer at Helios Solutions.

According to job sites such as Indeed, Glassdoor, and Dice, the demand for data scientists continues to grow, year over year, as businesses across the industries increasingly depend on data-driven insights.

There are, in fact, many different learning paths to this hottest profession, and choosing the right one depends on where you are in your career. Besides mathematical and statistical skills, programming expertise is also one of the must-have skills an aspiring data scientist needs to acquire.

Let’s dig deeper to unearth the most popular programming languages in the data science community!


Top 3 programming languages most used by data scientists

As revealed by the findings of a survey conducted by Kaggle, an online community of data scientists and machine learners, Python is the most used programming language followed by SQL and R (see image below).

The survey was carried out on nearly 24,000 data professionals, wherein 3 out of 4 respondents recommended aspiring data scientists to begin their learning journey with Python.  In this article, let’s find out what makes Python the most sought-after programming language among data professionals and why to choose Python for data analysis.


Why data scientists love Python?

Data scientists need to deal with complex problems, and the problem-solving process basically involves four major steps - data collection & cleaning, data exploration, data modeling and data visualization.

Python provides them with all the necessary tools to effectively carry out this process with dedicated libraries for each step that we will discuss later in this article. It comes with powerful statistical and numerical libraries such as Pandas, Numpy, Matplotlib, SciPy, scikit-learn, etc.and advanced deep learning libraries such as Tensorflow, PyBrain, etc.

Moreover, Python has emerged as the default language for AI and ML, and data science has an intersection with Artificial Intelligence. Therefore, it is not at all surprising that this versatile language is the most used programming language among data scientists.

This interpreter-based high-level programming language is not only easy to use, but it also equips data scientists to implement solutions and, at the same time, follow the standards of required algorithms.

Now, let’s take a look at the steps involved in the data science problem-solving process and Python packages for data mining that should be an indispensable part of your toolbox as a data scientist:

  1. Data collection & cleansing
  2. Data exploration
  3. Data modeling
  4. Data visualization & interpretation


Data collection & cleansing

With Python, you can play with almost all sorts of data that are available in different formats such as CSV (comma-separated value), TSV (tab-separated value) or JSON sourced from the web.

Whether you want to import SQL tables directly into your code or need to scrape any website, Python helps you achieve these tasks easily with its dedicated libraries such as PyMySQL and BeautifulSoup, respectively. The former enables you to easily connect with a MySQL database to execute queries and extract data while the latter helps you to read XML and HTML type data. After extracting and replacing values, you would also need to take care of missing data sets during the data cleansing phase and replace non-values accordingly.

Furthermore, if you get stuck with any particular dataset, then you can get a solution by doing a Google search about that dataset and Python, thanks to the strong and vibrant Python community!


Data exploration

Now that your data is collected and tidied up make sure it is standardised across all the data collected. Now that you have clean data, figure out the business question that needs to be answered and then convert that question into a data science question.

For that, explore the data to identify their properties and segregate them into different types such as numerical, ordinal, nominal, categorical, etc., in order to provide them required treatments.

Once data is categorised as per their type, NumPy and Pandas, the data analysis Python libraries, will help you to unleash insights from the data by allowing you to manipulate it easily and efficiently.

Now that your data is ready to be used, it's time to jump onto AI and machine learning for data modelling.


Data modelling

This is a very crucial phase in the data science process wherein you would strive to minimize the dimensionality of your data set.

Python has many advanced libraries to help you tap the power of machine learning in performing the tasks involved in data modelling.

Would you like to perform a numerical modeling analysis of your data? Just reach out for Numpy in your toolkit! With SciPy you can easily perform scientific computing and calculations. Scikit-learn code library offers you an intuitive interface and helps you apply machine learning algorithms to your data without any complexities.

After data modelling is over, you would need to visualize and interpret data for actionable insights.


Data visualization & interpretation

Python has many data visualization packages. Matplotlib is the most used library among them for generating basic graphs and charts. In case you need beautifully designed advanced graphs, you could also try another Python library, Plotly.

Another Python library, IPython, helps you with interactive data visualization and supports the use of a GUI toolkit. If you want to embed your findings into interactive web pages, nbconvert function can help you convert your IPython or Jupyter notebooks into rich HTML snippets.

After data visualization, the presentation of your data is of utmost importance, and it must be done in such a manner that the findings are driven by your business questions that you have asked at the beginning of your project.

Now that you deliver the answer to the business questions along with actionable insights, try to keep in mind that your interpretations appear useful to the stakeholders of your organization.


Ready to embrace Python for your data science goals?

With so many reasons to consider Python programming when you are embarking on your data science journey, here’s another solid one to consider. Top tech giants are also using Python for various reasons. Here’s why Amazon is using Python:

So, what’s your say on using Python for data science? Even if you prefer any other language for data science over Python, nevertheless let us know your views. Please share your experience with us by leaving your comments below.


Bio: Poli Dey Bhavsar is a Content Writer at Helios Solutions. She puts her passion for content to work by writing stories on the latest tech trends and advancements in IT.  When she is not hitting the keyboard, she is cooking delicacies, traveling, and trying to unearth the meaning of life.