elegantt

Overview

elegantt is gantt chart drawing library designed for developers and project managers who need to visualize project timeline efficiently. With support for both CSV and Mermaid formats. elegantt provides the flexibility and functionality you need to keep your projects on task.

Features

• Simpe and intuitive API
• Supports both CSV and Mermaid Gantt chart formats
• customizable chat size and colors
• Command line interface for quick usage
• Cross-platform support

Installation

Install elegantt via pip:

pip install elegantt

Fonts Installation

To ensure proper rendering of text, install the necessary fonts:

on Ubuntsu

apt install fonts-noto-cjk

on RedHat/RockyLinux

yum install google-noto-sans-cjk-ttc-fonts.noarch

on Mac

yum install google-noto-sans-cjk-ttc-fonts.noarch

Usage

Command Line interface

Generate a Gantt chart from CSV file:

elegantt --fname sample.csv --out sample.png

CSV Format Example

2023-01-01,2023-01-04,Task 1
2023-01-02,2023-01-05,Task 2
2023-01-04,2023-01-06,Task 3

generate a Gantt chart from a Mermaid format:

elegantt --fname sample_mermaid.txt --out sample.png

Mermaid Format Example

gantt
    section task a
    task b            :active,  des2, 2024-05-20, 4d
    task c            :         des3, after des2, 7d

generate a Gantt chart from a Mermaid format:

elegantt --fname sample_markdown.md --out sample.png

Markdown Format Example

|2024-06-15|2024-06-18|task a|
|2024-06-20|2d        |task b|
|3d        |          |task c|

As a library

integrate elegantt into your python projects for advanced usage:

import elegantt

# Define chart properties
chartsize = (720,320)
bgcolor = (255,255,255)

# Create a Gant chart object
gchart = elegantt.EleGantt( chartsize, bgcolor, today="2019-10-15")

# Draw calendar and campains
gchart.draw_calendar()
gchart.draw_campain("2019-10-15","2019-10-18","Task 1")
gchart.draw_campain("2019-10-20","2019-10-23","Task 2")
gchart.draw_campain("2019-10-24","2019-10-30","Task 3")
gchart.save("gantt_chart.png")

or auto_draw for mermaid or markdown format

import elegantt

s = """
    task a  :done, des1, 2024-06-15, 2024-06-18
    task b  :active, des2, 2024-06-20, 2d
    task c  :         des3, after des2, 3d
"""
gchart = elegantt.EleGantt(today="2024-06-18")
gchart.auto_draw(s, mode="mermaid")
gchart.save("gantt_chart.png")

If you want to specify fonts, write set_font() before draw_calendar() or auto_draw().

import elegantt

s = """
    task a  :done, des1, 2024-06-15, 2024-06-18
    task b  :active, des2, 2024-06-20, 2d
    task c  :         des3, after des2, 3d
"""
gchart = elegantt.EleGantt(today="2024-06-18")
gchart.set_font("C:\Windows\Fonts\meiryo.ttc")
gchart.auto_draw(s, mode="mermaid")
gchart.save("gantt_chart.png")

If you want to draw gantt chart on Google colab, import IPython and write like this.

import elegantt
from IPython.display import display

g = elegantt.EleGantt()
s = """
Task A: 2024-07-08,3d
Taks B: 3d
"""
g.auto_draw(s)
display(g.im)

You can set holidays like this.

gchart = elegantt.EleGantt(today="2024-06-18")
gchart.set_holidays(["2024-06-19",2024-06-25])

You can also set holidays with holidays lib.

import holidays
import pandas as pd

jp_holiday = holidays.country_holidays('JP')
my_holidays = []
days = 10

date_list = pd.date_range(
    start=pd.Timestamp("today").normalize(),
    end=pd.Timestamp("today")+pd.Timedelta(days=days)
).tolist()

for date in date_list:
  if date in jp_holiday:
    print(date, jp_holiday.get(date))
    my_holidays.append(date.strftime('%Y-%m-%d'))
  else:
    print(date)

gchart.set_holidays(my_holidays)

You can change color like this.

gchart = elegantt.EleGantt(today="2024-06-18")
gchart.parse_color_schema('{"bg_color":[255,255,255],"bar_color":[0,103,192]}')

more...

g = elegantt.EleGantt()
g.parse_color_schema('{"#red":[255,0,0]}')
s = """
task a : 3d
task b #red: 3d
task c : 1d
"""
g.auto_draw(s)
g.save("test.png")

Lisence

This project is licensed under the MIT License, see the LICENSE.txt file for details

Contributing

We welcome contributions!

Support

For support or any questions, feel free to open an issue on our Github page.