MLJAR's Blog

• Python Dashboard for 15,963 Data Analyst job listings

  April 26, 2023 by Adrian Błazeusz Matplotlib Jupyter

  The US job market is filled with exciting opportunities for aspiring Data Analysts. However, landing your first job can be challenging due to the diverse range of requirements employers are looking for. In this article, we analyze data from 15,963 Data Analyst job listings. We build a Jupyter Notebook with data analysis and visualization, and serve it as an interactive web app. For example, we search for the most needed skills and show their dependency on the average yearly salary. Let’s check what the most needed skills for Data Analyst are!

  Read More

• Jupyter Notebook in 4 flavors

  December 03, 2022 by Aleksandra Płońska, Piotr Płoński Jupyter

  Jupyter Notebook is a popular open-source tool for development and exploration in a data world. It started from IPython Notebook developed by Fernando Pérez and Brian Granger. Currently, the Jupyter Notebook is available as 4 different web applications: Classic Jupyter Notebook, Jupyter Lab, Jupyter RetroLab, and Jupyter Lite. Let’s look closer for differences between those Jupyter versions.

  Read More

• 9 ways to set colors in Matplotlib

  November 21, 2022 by Aleksandra Płońska, Piotr Płoński Matplotlib

  Matplotlib is a powerful visualization package for Python. It is very customizable, thanks to this it is widly used in commercial and in academic use cases. In this article, I will show you 9 different ways how to set colors in Matplotlib plots. All parts of the plot can be customized with a new color. You can set colors for axes, labels, background, title. However, not every data scientist is a graphic designer that can compose nice looking colors in a single plot, so I can show you how to use predefined Matplotlib styles to get attractive plots.

  Read More

• 3 ways to get Pandas DataFrame row count

  November 12, 2022 by Aleksandra Płońska, Piotr Płoński Pandas

  The Pandas it’s a popular data manipulation library. The Pandas has over 15k stars on Github. It’s an open-source project that allows, among others: automatic and explicit data alignment, easy handling of missing data, Intelligent label-based slicing, indexing, and subsetting of large data sets, merging data sets, or flexible reshaping and pivoting of data sets There are 3 ways to get the row count from Pandas DataFrame. I will describe them all in this article. My preferred way is to use df.shape to get number of rows and columns. This method is fast and simple.

  Read More

• Convert Jupyter Notebook to Python script in 3 ways

  November 10, 2022 by Aleksandra Płońska, Piotr Płoński Jupyter Python Nbconvert

  Jupyter Notebook saves files in .ipynb format. It is a JSON with code, Markdown, and outputs. There are many cases in which we would like to convert Jupyter Notebook to plain Python script. For example, you would like to keep Python code in the repository or would like to turn your notebook into a standalone package. I will show you 3 ways to export the Jupyter Notebook file to Python script.

  Read More

• Save a Plot to a File in Matplotlib (using 14 formats)

  November 08, 2022 by Aleksandra Płońska, Piotr Płoński Matplotlib

  The Matplotlib is a popular plotting library for Python. It can be used in Python scripts and Jupyter Notebooks. The plot can be displayed in a separate window or a notebook. What if you would like to save the plot to a file? In this article, I will show you how to save the Matplotlib plot into a file. It can be done by using 14 different formats.

  Read More

• Complete list of 594 PyTZ timezones

  November 08, 2022 by Aleksandra Płońska, Piotr Płoński Python

  The pyTZ package is a Python implementation of the tz database. You can use pyTZ to list all available timezones from the tz database but not only. Below is a list of all available timezones in PyTZ. It is in total 594 timezones.

  Read More

• 2 ways to save and load scikit-learn model

  November 04, 2022 by Aleksandra Płońska, Piotr Płoński Scikit-learn

  After training of Machine Learning model, you need to save it for future use. In this article, I will show you 2 ways to save and load scikit-learn models. One method is using pickle package, it is fast but the model can take more storage than in the second approach. The alternative is to use joblib package, which can save some space on disk but is slower than the pickle.

  Read More

• 5 ways to publish Jupyter Notebook Presentation

  November 03, 2022 by Aleksandra Płońska, Piotr Płoński Jupyter Presentation

  Presentation created with Jupyter Notebook is exported to an HTML file. It is interactive, thanks to the Reveal.js library. There are several options to publish HTML presentations in the cloud.

  Read More

• 3 ways to change figure size in Matplotlib

  November 02, 2022 by Aleksandra Płońska, Piotr Płoński Matplotlib

  You’ve just created an amazing plot in Python with Matplotlib but would like to change figure size. I will show you three different approaches to changing figure size in Matplotlib. All code samples from article can be used in Python script or Jupyter Notebook (Jupyter Lab).

  Read More