Jinja a template based python library for beautiful and interactive reports

Jinja is a python library used for reporting purposes. First, we design the report on the template file. While designing we use placeholders and when we actually bind this template with data the placeholder value replace with the original value.

1. Jinja basic information.
2. What is template based library?
3. How to install jinja?
4. Jinja delimiters.
5. Example :  Jinja hello world example.
6. Example: Generating tabular reports using python library jinja2.

1. Jinja basic information

About	Jinja is a templating language. Jinja templates are just HTML files that usually reside inside the /templates directory of a Flask project.
install	pip install Jinja2
import	from jinja2 import Template
Url	https://palletsprojects.com/p/jinja/
PyPI Releases	https://pypi.org/project/Jinja2/
Is Open Source	YES
Source Code	https://github.com/pallets/jinja/
Latest Version	Version 3.1.2

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2. What is template based library?

In template based library, we use fixed layout to generate our reports. In template based design we create HTML page while few data is filled programmatically. We can also use loops to manipulate the output. In this we have pre-written markup template and pre-defined delimiters where data is inserted.

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3. How to install Jinja?

First ensure pip is installed on the system, if pip is not installed then there are 2 ways to get it installed on the system

• ensurepip
• get-pip.py

Once pip is setup on system then by using pip install  the Jinja2 library.

pip install Jinja2

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4. Jinja delimiters

{% %}	Used for statements
{{ }}	Used for expressions to print to the template output
{# #}	Used for comments which are not included in the template output
# ##	Used for line statements

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5. Example :  Jinja hello world example

# -*- coding: utf-8 -*-
"""
Created on Mon Jan 24 2022
website : https://www.mycloudplace.com
@author: Prem Shanker Verma
"""

#import jinja2 library
import jinja2

if __name__ == "__main__":
    #Create jinja2 environment
    env = jinja2.Environment()
    #Create hello world template
    templ = env.from_string("Hello, {{ value }}")
    output = templ.render(value="World")
    print(output)
    #Hello, World

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6. Example: Generating tabular reports using python library jinja2

In this example we will generate the list of blockbuster Bollywood movies

Below are the steps to generate tabular reports using jinja2

1. Create a new “jinjaTemplate” folder.
2. Create the HTML page having template code
3. Write the python code by using the template file and data
4. Create a new output HTML file with filled data

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Aug 10 15:49:49 2022
website : http://mycloudplace.com
@author: Prem Shanker Verma
"""
from jinja2 import Environment, FileSystemLoader

if __name__ == "__main__":
    Movies = [
        {'Movie':'Baahubali 2 The Conclusion', 'Budget':'250', 'Verdict':'All Time Blockbuster'},
        {'Movie':'KGF Chapter 2', 'Budget':'100', 'Verdict':'All Time Blockbuster'},
        {'Movie':'Dangal', 'Budget':'70', 'Verdict':'All Time Blockbuster'},
        {'Movie':'Sanju', 'Budget':'100', 'Verdict':'All Time Blockbuster'},
        {'Movie':'PK', 'Budget':'85', 'Verdict':'All Time Blockbuster'},
        {'Movie':'Tiger Zinda Hai', 'Budget':'210 ', 'Verdict':' Blockbuster'},
        {'Movie':'Bajrangi Bhaijaan', 'Budget':' 90 ', 'Verdict':'All Time Blockbuster'},
        {'Movie':'War', 'Budget':'150', 'Verdict':'Blockbuster'},
        {'Movie':'Padmaavat ', 'Budget':'215', 'Verdict':' Blockbuster'},
        {'Movie':'Sultan', 'Budget':'80', 'Verdict':' Blockbuster'},
        {'Movie':'Kabir Singh', 'Budget':'55', 'Verdict':' All Time Blockbuster'},
        {'Movie':'Tanhaji: The Unsung Warrior', 'Budget':'150', 'Verdict':' Blockbuster'},
        {'Movie':'Dhoom 3', 'Budget':' 175 ', 'Verdict':'All Time Blockbuster '},
        {'Movie':'The Kashmir Files', 'Budget':' 20', 'Verdict':'All Time Blockbuster'},
        {'Movie':'URI The Surgical Strike', 'Budget':'70 ', 'Verdict':'All Time Blockbuster'}
        ]
    
    file_loader = FileSystemLoader('jinjaTemplate')
    env = Environment(loader=file_loader)
    template = env.get_template('movieList.html')
    output = template.render(Movies=Movies)
    print(output)
    
    with open("listofmovies.html", 'w') as htmlOutput:
        htmlOutput.write(output)

Template code:

 OUTPUT:

Movie	Budget	Verdict
Baahubali 2 The Conclusion	250	All Time Blockbuster
KGF Chapter 2	100	All Time Blockbuster
Dangal	70	All Time Blockbuster
Sanju	100	All Time Blockbuster
PK	85	All Time Blockbuster
Tiger Zinda Hai	210	Blockbuster
Bajrangi Bhaijaan	90	All Time Blockbuster
War	150	Blockbuster
Padmaavat	215	Blockbuster
Sultan	80	Blockbuster
Kabir Singh	55	All Time Blockbuster
Tanhaji: The Unsung Warrior	150	Blockbuster
Dhoom 3	175	All Time Blockbuster
The Kashmir Files	20	All Time Blockbuster
URI The Surgical Strike	70	All Time Blockbuster

For all python reporting library please visit my previous post.

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