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Chapter 65 – Flask Search Bar Plus Dynamic Data Table Return Using Pandas and Python

Louis Lu

A search box or search bar is a popular function applied on Web applications for visitors to look up things you are finding. A great UX search function can hugely shorten the information search journey and enhance the user experience. In this article, I will go through how to set up a fundamental search function using Flask and return data in the panda’s data frame.

Ingredients on Flask Search Bar Plus Dynamic Data Table Return Using Pandas

Table of Contents

Search Bar

Adding a search bar needs a form method and search type of input method added in the clientside HTML script folder. In Flask, we need to create a new HTML script saved in the template folder. Here are the codes as follows:

Please be sure to check two variable values. One is to add the route name “symbolResult” in the action parameter which is the same as the Flask route name you create in the Python script file. 

The other is the input id value must be the same as the form name value on the server side. I will elaborate more in a moment.

Search Result and Easy2Digital API

After having created the search bar page or a search bar function embedded on any pages you like. Now we need to develop a search result data return after any users search. Basically, the data communication includes 2 sections – Server Side and Client Side

Server Side – Python, Pandas

First thing first, we need to create a route to return the search result to the user. The route name here must be the same as the client-side HTML form action name. It’s for connecting them together.

Then, we need to create a form variable to capture the keyword users’ input to look up information. And the value in the get() must be the same as the ID in the form of the client-side mentioned above.

Additionally, based on the keyword, we can use it to connect our database. Here I take Easy2Digital API for example and I select the financial ratio one. If you are interested in the Easy2Digital API collection. Please check out more details on this page.

We use the request methods and add related parameters in the Easy2Digiatal API endpoint to fetch the data related to the keyword from the search bar.

Last but not least, for returning a table of data to display in the search result, we can leverage the panda’s data frame and the code sample is as follows:

Client Side – Html, CSS, Jinja

When the server-side code and route are ready, it returns the information related to the search keyword back to the client side. The question is how the client side in HTML, and CSS can display the data from the server side. Jinja2 and for loop, zip() methods can be used in this case. Here are the codes as follows:

Full Python Script of Web App Search Bar Using Flask and Pandas

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FAQ:

Q1: What is Flask Search Bar?

A: Flask Search Bar is a plugin designed for Flask-based websites to add a search functionality to their site.

Q2: How does Flask Search Bar work?

A: Flask Search Bar works by indexing the content of your website and creating a search index. When a user enters a search query, the plugin searches the index for relevant results and displays them to the user.

Q3: Can Flask Search Bar be customized?

A: Yes, Flask Search Bar can be customized to match the design and functionality of your website. You can modify the search bar’s appearance, search algorithm, and search results display.

Q4: Is Flask Search Bar compatible with all Flask versions?

A: Flask Search Bar is designed to be compatible with the latest stable versions of Flask. However, it’s always recommended to check the plugin’s documentation for specific compatibility information.

Q5: Does Flask Search Bar support multiple languages?

A: Yes, Flask Search Bar supports multiple languages. It uses language-specific analyzers to ensure accurate search results for different languages.

Q6: Can Flask Search Bar handle large websites with many pages?

A: Yes, Flask Search Bar is designed to handle large websites with many pages. It efficiently indexes and searches through the content, providing fast and accurate results.

Q7: Is Flask Search Bar SEO-friendly?

A: Yes, Flask Search Bar is SEO-friendly. It generates search-friendly URLs, allows customization of meta tags, and provides options to exclude specific pages from being indexed.

Q8: Is Flask Search Bar compatible with mobile devices?

A: Yes, Flask Search Bar is compatible with mobile devices. It is designed to be responsive and provide a seamless search experience on both desktop and mobile devices.

Q9: Can Flask Search Bar integrate with other plugins or extensions?

A: Yes, Flask Search Bar can integrate with other plugins or extensions. It provides hooks and APIs to allow seamless integration with other Flask extensions or custom functionality.

Q10: Is Flask Search Bar easy to install and set up?

A: Yes, Flask Search Bar is easy to install and set up. It comes with detailed documentation and examples to guide you through the installation process and configuration options.
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