Pandas is one of the most powerful tool for analyzing and manipulating data. In this article, I will be sharing with you the solutions for a very common issues you might have been facing with pandas when dealing with your data — how to pass multiple columns to lambda or self-defined functions.

Prerequisite

You will have to install pandas on your working environment:

pip install pandas

When dealing with data, you will always have the scenario that you want to calculate something based on the value of a few columns, and you may need to use lambda or self-defined function to…

Introduction

Python is a very powerful programming language with easily understandable syntax which allows you to learn by yourself even you are not coming from a computer science background. Through out the learning journey, you may still make lots mistakes due to the lack of understanding on certain concepts. Learning how to fix these mistakes will further enhance your understanding on the fundamentals as well as the programming skills.

In this article, I will be summarizing a few common Python mistakes that many people may have encountered when they started the learning journey and how they can be fixed or avoided.

Reload Modules after Modification

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Introduction

One-liner in Python refers to a short code snippet that achieves some powerful operations. It’s popular and widely used in Python community as it makes the code more concise and easier to understand. In this article, I will be sharing some most commonly used Python one-liners that would definitely speed up your coding without compromising any clarity.

Let’s start from the basis.

Ternary operations

Ternary operation allows you to evaluate a value based on the condition being true or false. Instead of writing a few lines of if/else statements, you can simply do it with one line of code:

x = 1…

You probably use Google Maps a lot in your daily life, such as locate a popular restaurant, check the distance between one place to another, or find the nearest driving route and shortest travelling time etc. If you have been thrown with a big set of location data where you need check and validate them from a map, and then find the optimal routes, you probably would think how this can be done programmatically in Python. In this article, we will be exploring how all these can be achieved with Python Google Maps APIs.

Prerequisites

To be able to use Google…

Introduction

If you are working as a data analyst or data scientist for some time, you may have already known how to use matplotlib to visualize and present data in various charts. The matplotlib library provides an animation module to generate dynamic charts to make your data more engaging, however it still takes you a few steps to format your data, initialize and update the data into the charts. In this article, I will demonstrate you another Python library — pandas-alive which allows you to generate animated charts directly from pandas data without any tedious format conversion.

Prerequisites

You can install this…

Introduction

Python random module provides a convenient way for generating pseudo-random numbers in case you need some unpredictable results for your application such as the computer games, a lucky draw system or even the shuffling logic for your music player. Since it provides various functions to generate results in “unpredictable” manner, developers attempted to use this feature to produce random password or authentication token for security purpose without understanding of it’s fundamental implementation. In this article, we will be discussing how the Python random module has been misunderstood and misused for the scenarios which it shall not be used.

Basic usage of Python random module

Let’s take…

Christmas is just around the corner, the snowfall, beautiful festive lights and joyful songs from the last year still floating in your mind. But this year, things are getting unusual due to the Covid-19. A lot of celebration events are cancelled or suspended and people are advised to avoid gathering and stay at home as much as possible. Although staying at home became new norm, there is still a way that we can get to know what people are thinking about during this festive season since nowadays most of us search a lot from Google every day. …

Introduction

In the previous post, we have discussed about how to start web scraping with requests and lxml libraries, and we also summarized two limitations with this approach:

• Time & effort required to chain all the requests for some complicated operations such as user authentication
• Triggering a button click or calling JavaScript code is not possible from the HTML response

To solve these two issues, I recommended to use selenium package. …