How To Create An Interactive Gantt Diagram In Python Using Plotly & Excel | Step-by-Step Tutorial
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- Опубліковано 3 жов 2024
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In this tutorial, I will show you, how to create a Gantt Diagram in Python.
The data is coming directly from an Excel file.
You can do all the changes in the excel file and after running the code again you will have your updated Gantt Diagram.
The Gantt Chart is interactive and will be saved as an HTML file.
You can download the code & excel file here:
github.com/Sve...
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Drag and drop and resize tasks dynamically will be amazing.
Thank you for watching the video and taking the time to leave a comment!
Underrated channel!
Thank you! 🙏
This was great! Now I just have to figure out how to get it to work with time instead of dates! Thanks for getting me started.
Thank you! Do you mean something like this [example image]: ibb.co/8rvW0qC
If yes, I have create this version for you [download link to files]:
drive.google.com/file/d/1tZI8LPMsAtlp1VV5wpHtBRI73VjPjgLs/view?usp=sharing
Hope that helps!
@@CodingIsFun Yes! Thank you! I figured that earlier, didn't realize you had to conform to a certain format. I'm currently trying to get two lines of data on one horizontal bar. So kind of like you have in your example but there would be another "start" and "finish".
Do you mean something like this?
ibb.co/LrnxfGq
@@CodingIsFun close the columns would read as Task, Start, Finish, Start2, Finish2, Complete in % if that makes any sense
Alright, I think you would like to have something like this [example image]: ibb.co/KrvTWwn
Here is the source code:
drive.google.com/file/d/1W_wPxaClHF0OwTmvHPFWOZI99imxM-fE/view?usp=sharing
Amazing! Works perfectly! Thanks
Thank you! Glad to hear that.
Thank you! Great tutorial!
Thank you! Glad you liked it!
Thank you so much for this great tutorial!
Glad you enjoyed it! Thanks for watching! :)
Pretty cool tool. Can't believe how many free online tools require a payment now, just to use their most basic gantt chart making tools.
Happy to hear that it was useful; thank you for taking the time to leave a comment and for watching the video!
Danke für dieses tolle Video :)
Danke! Es freut mich, dass es dir gefallen hat. 😃
very cool mate, thank you, new sub here
*I am glad you liked the video, thanks for watching and for the comment!* Cheers ✌
hey! thanks so much for this video. i'm doing a university project in visualization with python and this helped me so much to get started. I was wondering if you could give me a tip for the most beginner friendly way of making an animated gantt chart in python (so far i couldnt make it work in plotly but maybe you have a tip. Could be basically any library the main thing would be that its possible :D Thanks so much for your asnwer in advance.
Hi,
thank you for your comment.
I actually do think, that Plotly(express) is one of the most beginner-friendly libraries to create an interactive Gantt chart. With just a few lines of code, you can get stunning results.
Cheers,
Sven
Amazing tutorial! I'm new to Python so forgive me if this is a dumb question, but is there a way using plotly to add a scroll bar to the gantt chart? My schedules can be 1,000s of activities and I'm trying to find a way to not compress the entire gantt chart onto one window. Cheers!
Thank you! Excellent question! I have checked the Plotly documentation, but I could not find a way to add a scroll bar to the Gantt chart. 😕
@@CodingIsFun Thanks for looking and for the reply! Really appreciate it.
Thank you. This was very helpful. I was just wondering how to allocate different colors (i.e., colors other than the default black) without the % completion data (meaning, all values in % completion column = 0)
Thanks for watching the video. Usually, the colour is indicated by the completion rate. Would you like to ignore the completion column and set a different colour for each task?
E.g.
Task 1: Red
Task2: Blue
@@CodingIsFun Yes. In fact, I would like only single color for all bars. But if you can additionally show how to allocate multiple colors (e.g., Task1: Red, Task2: Blue), then that's also fine.
@@jawwadrezanoor913 I went ahead and modified the code for you.
Please find
the code here: gist.github.com/Sven-Bo/4b6dc57dcaacb38002eb4b82f7ce22f4
the result will look like this: www.screencast.com/t/xtLHTJUAvylM
import plotly.express as px
import plotly
import pandas as pd
# Read Dataframe from Excel file
df = pd.read_excel("Tasks.xlsx")
# Assign Columns to variables
tasks = df["Task"]
start = df["Start"]
finish = df["Finish"]
# Create Gantt Chart
fig = px.timeline(
df,
x_start=start,
x_end=finish,
y=tasks,
title="Task Overview",
color_discrete_sequence=["#F63366"] * len(df),
)
# Upade/Change Layout
fig.update_yaxes(autorange="reversed")
fig.update_layout(title_font_size=42, font_size=18, title_font_family="Arial")
# Save Graph and Export to HTML
plotly.offline.plot(fig, filename="Task_Overview_Gantt.html")
Hope you like the solution :)
Thanks for this video, that's helpful but i'm wondering if there is any way to add a "Comments" column in the excel file in order to add a hover text in the gantt chart?
Thanks for watching & your comment.
I have created this solution for you:
👉 drive.google.com/file/d/1uecsVpQd2gPXxaEadRdScn_-ufxujbKM/view?usp=sharing
It will look like this:
👉 snipboard.io/FSpX4o.jpg
Hope it works for you 😃
Cheers,
Sven
@@CodingIsFun Many thanks for your quick answer ;). Yesterday i got the same result as you on the "standard" Gantt chart but that does not work on the interactive one (sorry my question was not enough precise). I tried also to update the fig by using fig.update_traces(hovertext=comments), the update works but comments are not matching with bars (and i have different comments on start and finish position on the same bar).
@@jamilhassan9491 Alright, gotcha. I have created the following example for you:
👉 snipboard.io/De3byN.jpg
You can download it here:
👉 drive.google.com/file/d/1nHv-x1LV2ceCQmgeWRGlvd5sJBJev7BK/view?usp=sharing
In the Excel File, you want to make sure to name the header "Description"
Hope this solution works for you.
Cheers,
Sven
Many thanks it's working fine now :D
Appreciate the tutorial. It helped me a lot. Curious if we can add dependencies to the Gantt chart.
Thanks for watching the video & your question. What exactly do you mean by dependencies? Could you please provide more information? Thanks!
@@CodingIsFun Thanks for the quick response. A traditional Gantt chart can have information that the start of a particular task is dependent on the finish of another task. It is typically represented by connecting arrows showing the flow of information.
@@farazmehdi9019 Thanks for the further input. I had a look at the Plotly documentation ( plotly.com/python/gantt/ ), but it seems that this is not possible😕
@@CodingIsFun I personally think those arrows do not serve a whole lot of purpose but people are just used to them. Thanks for looking into it.
Amazing tutorial ! thanks so much for this video.i'm doing a university project in visualization with python and this helped me so much to get started.
I'm new to Python so forgive me if this is a dumb question :
Is there a way to manipulate the bars by using the mouse in the image,for example assemble or return , or is there another way?But i want in the same thing(time line),Another library !!, I don't know !?
I hope for an answer.
Thanks in advance 😊
Thanks for watching the video. I am not sure if I understand you correctly. Would you like to execute/return a Python function when clicking the bar? Could you maybe provide some more information? Thanks!
@@CodingIsFun If the tape is of the same type or color, I want when I click on it, I can move it and combine it with another tape by mouse
(Interactive image is not for display only i want change some with mouse )
Briefly I'm looking for something change the input table data by changing the image with the mouse (Interactive display picture)
Thank you very much
@@CodingIsFun I want timeline output like this when i click with the mouse to change place of tasks ,in the same can change the dataframe also
can you help me in this problem
@@nailialaeddine1168 Thanks for the further input. As far as I know, this is not possible with Plotly, and I do not know any other library with that feature. Sorry!
Thank you so much. I want to try this but just to publish my excel table as is. Would it work with this code?
Thank you for watching the video. Sorry, I am not quite sure what your concern is. Would you like to know if the code works if your excel data is formatted as a table? If so, the answer would be yes 😃
Thanks for responding too!
What I mean is that i dont need to make a gantt chart. Just need to show my excel data on a browser as a table with the same formatting as it appears on excel. I know its probably a silly question but im not a coder so im just trying it out.
@@imranmasoud1849 Ok understood. I think the easiest way would be to save your Excel workbook as a web page. See screenshot below:
prnt.sc/12kpi7v
Hope you like the solution 🙏
I had an error in powershell when trying to print output. I installed additional library openpyxl and this seemed to fix the problem. In case anyone else facing similar issue.
Thanks for the hint. I added it to the requirements.txt file on GitHub. Cheers, Sven ✌️
Plotly is cool but it is a complete mess regarding Gantt chart. In my case, the bar heights are completely random. Some is like a thread of hair thick, some take literally a quarter of my screen's height. I have looked up and find out that many people are experiencing the same problem and there seem to be no effective way to overcome this just yet.
Thanks for watching the video & sharing your experience with the Plotly Gantt chart 👍
is it able to change the x-axis from time to numeric positions?(like 1-10000)
Thanks for watching. I am not sure if that is possible.
hey! Is it possible to put colors in the background of the interface specify a specific time
For example, every day a color or every month a color
something like this
!?
I hope for an answer.
Thanks in advance 😊
Thanks for watching. I am not sure what you are trying to achieve.
So, January should be red, February blue, March green, ...?
And all the tasks in the month should be coloured accordingly? E.g. tasks in February should be marked blue?
You might want to check out the documentation to see what is possible:
plotly.com/python-api-reference/generated/plotly.express.timeline.html
Happy Coding!
@@CodingIsFun i mean the same Gantt Diagram in your example in the video
But I mean the background of the Gantt chart every month or every year (in a faint color for example), any light colors behind the task
@@nailialaeddine1168 In the current script, I am update the layout as follows:
fig.update_layout(title_font_size=42, font_size=18, title_font_family="Arial")
You can add additional params, see below:
fig.update_layout(title_font_size=42, font_size=18, title_font_family="Arial", plot_bgcolor=rgba(0, 0, 0, 0), paper_bgcolor=rgba(0, 0, 0, 0))
That's a great tutorial. One thing I could not figure out is the date in my Gantt chart always start from 1970. It looks like the date was not read from my excel file somehow. Do you know how to fix it? Thank you.
*Hi Ray Yao. I am glad you liked the video, thanks for watching and for the question!*
Did you try already to format the cell in Excel as a 'Date' (see example below):
prnt.sc/11u201x
@@CodingIsFun Thanks for your response. I just downloaded your excel file and copied date columns to my excel and it worked out perfect. Does it only work with the date format you picked such as 2012-03-14?
@@umyaor Sorry for my late response, I was at work.
You could also change it directly in Plotly by updating the x-axes:
fig.update_xaxes(tickformat="%b %d, %Y")
*Here is the example code:*
gist.github.com/Sven-Bo/56fe035cceeed8d19bfc555bec972ff3
*The output would look like this:*
snipboard.io/TjKZen.jpg
Hope it helps 🙏
Thanks man for the video! I have one question, Can we justify the yticks to the left? I found no solution available yet! I tried to bypass that by adding extra spaces (all ticks with the same character count) to the left of the shorter ticks but apparently the space length is not as the letter length which makes it not possible to have all ticks start at the same (left level).
Sorry, but I am not quite sure what you are trying to achieve. The y-ticks are currently on the left side ( www.screencast.com/t/ZsHhwBkbn ). How would you like to position them?
@@CodingIsFun thanks man for answering. I want all ticks to start from the same left level, now python plotly is filling the ytick from right to left, I want the reverse case meaning that I want the yticks to be left justified. Thanks
@@chemmakhabderraouf1988 Ok understood. I am not sure if that is possible. All I can do for you is to refer to the official docs, where you can find all parameters:
plotly.com/python-api-reference/generated/plotly.express.timeline.html
How can you make it show that the task finishes in the same day but it only took some hours?
Thank you! Do you mean something like this [example image]: ibb.co/8rvW0qC
If yes, I have created this version for you [download link to files]:
👉 drive.google.com/file/d/1tZI8LPMsAtlp1VV5wpHtBRI73VjPjgLs/view?usp=sharing
Hope that helps!
Cheers,
Sven
@@CodingIsFun yes thanks man I appreciate it
Is it in javascript?
No, the code is written in Python
@@CodingIsFun I want Gantt chart in JavaScript using plotly
@@manikantareddy2385 I have checked the Plotly documentation: plotly.com/javascript/
Currently, it seems that there is no Plotly Gantt Chart available in JS. 😥
@@CodingIsFun yeah, I also checked.😟 Thanks for reply 🤝🤝