Bokeh tooltip number format. To the right is what default tools look like.

Bokeh tooltip number format Tools can be Nov 14, 2015 · Note that the tooltips for the upper left point (1, 3) displays correctly while the other two points do not show any tooltips when mouse hover over them. When used on a string, it causes the result to be truncated. nan`` in F_HEX column. Tools can be Jun 28, 2017 · Hello, I want to use the datetime formatting for the hovertool, but I’m not sure how to get it working. Donations help pay for cloud hosting costs, travel, and other project needs. datetime64) source = ColumnDataSource(data={ 'date' : datetime First steps 3: Adding legends, text, and annotations # In the previous first steps guide, you generated different glyphs and defined their appearance. Useful when using this model for persistent The Tooltip object # Bokeh uses the Tooltip model to manage tooltips. The types of gesture tools are: Pan/Drag Tools Click We would like to show you a description here but the site won’t allow us. copy() elements = elements The JavaScript code has access to the current value to format, some special variables, and any format configured on the tooltip. I am sure now it is caused by one of column data is ``np. The example below in Formatting tooltip fields demonstrates mode = "vline". import numpy as np from bokeh. Tools can be grouped into four basic categories: Gestures These tools respond to single gestures, such as a pan movement. stocks import AAPL def datetime In the mean time, your best option is to pre-format the data as you want it to appear in the tooltip in Python. See Tooltip in the reference guide for additional information. 11}, but when I do this I find that some numbers in scientific notation are either rounded down or not displayed at all. models Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. select(dict(type=HoverTool)) hover. Then add a column to your data source that has the formatted version, the configure the hover tool to display this column: Jul 23, 2025 · To format the hover tooltips to show integers instead of floats, you need to specify a custom format for the tooltip. themes. Tooltips provide interactive data based on the position of the mouse. As pandas do . We Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. The Bokeh plotting module provides several tools that can be used to enhance the functionality of the plots. plotting import figure, show from bokeh. Float number 19112. For example, the middle point (2, 2) has ``np. However, if I zoom or pan the graph in such a way that the dummy glyphs are no longer rendered, then the tooltips no longer display. formatter=NumeralTickFormatter(format="0") curdoc(). properties import value from bokeh. 0 is a basic numeric format for me , need print 19112. This article will guide you through the process of setting the X-axis as datetimes on a Bokeh plot, including formatting and customization . Actions. To add tooltips to a visualization, import the HoverTool function, as shown below. These tools can be configured to suit your specific needs. seed(1) sample_size = 10 mean, std, K_std = 1e6, 3e5 Mar 12, 2015 · I want my Bokeh figure to show me the integer value of each datapoint when I hover over it. The Bokeh Python library (and libraries for other languages such as R, Scala, and Julia) enables convenient high-level interaction with BokehJS, so you don’t have to worry about JavaScript or web development. py Dec 9, 2019 · I'm trying to format my tool tip to Month Year format but it doesn't seems to work? Here's my code: import numpy as np # linear algebra import pandas as pd from bokeh. palettes import RdYlGn9 from bokeh. Theme. 3. Tools can be There is a scatter function that can be parameterized by marker type: scatter () scatter () There are also specialized methods for stacking bars: bars: hbar_stack (), vbar_stack () lines: hline_stack (), vline_stack () areas: harea_stack (), varea_stack () bars: hbar_stack (), vbar_stack () lines: hline_stack (), vline_stack () areas: harea_stack (), varea_stack () As well as one specialized There is a scatter function that can be parameterized by marker type: scatter () scatter () There are also specialized methods for stacking bars: bars: hbar_stack (), vbar_stack () lines: hline_stack (), vline_stack () areas: harea_stack (), varea_stack () bars: hbar_stack (), vbar_stack () lines: hline_stack (), vline_stack () areas: harea_stack (), varea_stack () As well as one specialized Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Nov 6, 2015 · Note that the tooltips for the upper left point (1, 3) displays correctly while the other two points do not show any tooltips when mouse hover over them. Add circle glyphs, with minutes on the x-axis against points, using source. Formatting tooltip fields # By default, values for fields (@foo, for example) are displayed in a basic numeric format. Does anyone know if this is possible, and how? Thanks. e. The types of gesture tools are: Pan/Drag tools Click/Tap tools Jun 22, 2017 · Hi, I have a plot that could have 10’s of lines and having the ability to allow the user to click on the legend and hide some of these lines is a great feature. File: ThreePointAttVsPctHover. Jul 23, 2025 · Bokeh is a powerful data visualization library in Python that allows you to create interactive and visually appealing plots. For the first three comprise the category of gestu import numpy as np from bokeh. I have tried to place the legend Mar 1, 2016 · Hi all, The tool tip does not show the date in the correct format in the line chart. Create informative and dynamic data visualizations with custom tooltips. My intention is to display only a single one, using the attribute: Nov 7, 2025 · from datetime import datetime import numpy as np import pandas as pd from bokeh. Tools can be Configuring plot tools ¶ Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. 2017-05-01), rather it shows a some long number (i. Tool are the icons that are displayed by default to the right of a visual when looking at a Bokeh output. Format the field_goal_perc element of TOOLTIPS to display to the nearest two decimal places. (dot) followed by a number, specifies how many digits should be displayed for floating point numbers. Click/Tap. To further explore the capabilities of the HoverTool(), see the HoverTool guide. The types of gesture tools are: Pan/Drag Tools Click The example below in Formatting tooltip fields demonstrates mode = "vline". closable = False # Type: Bool Whether to allow dismissing a tooltip by clicking close (x) button. copy() elements = elements Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. One of its key features is the ability to handle datetime data, which is essential for time series analysis and other applications involving temporal data. I am close to getting what I want but when I hover over the data point, it shows a float and then higher up, it uses scientific notation. But I don’t see anything in Configuring plot tools — Bokeh 2. I have tried to place the legend Aug 27, 2024 · I want to create a hover tooltip like the below (one single line with the title and swatch). Create the figure, labeling the x-axis as "Minutes" and the y-axis as "Points", including TOOLTIPS. The Tooltip object has several properties to customize the behavior and appearance of tooltips. In this lesson you will add hover actions to your last visualization. For example, the time is “23:04:12”, I would see some random number having value “5. There might be an easier way to not have to format the datestrings as a separate column: Aug 19, 2019 · a basic numeric format is vague, I couldn’t expect bokeh print scientific-notation . Dec 29, 2016 · Also note there is an open issue about the lack of formatting options in the bokeh tooltip. Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Tools can be The number format, as defined as follows: the placeholder in the format string is marked by % and is followed by one or more of these elements, in this order: An optional + sign import numpy as np from bokeh. stocks import AAPL def datetime Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. html") def datetime(x): return np. datetime64) source = ColumnDataSource(data={ 'date' : datetime import pandas as pd from bokeh. This content either can be either a plaintext string or an HTML object: nrows or ncols: If items is a vector and one of these arguments is specified, it is partitioned into a 2D layout with the given number of rows or columns. Tooltips with Python's Bokeh One of the key features of Bokeh is its ability to provide interactive tools that allow users to interact with the plots. This content either can be either a plaintext string or an HTML object: Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. stocks import AAPL def datetime Jul 19, 2015 · Is it possible to add Tooltips to a Timeseries chart? In the simplified code example below, I want to see a single column name ('a','b' or 'c') when the mouse hovers over the relevant line. Configuring Plot Tools ¶ Bokeh comes with a number of interactive tools that can be used to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. 1 chrome v. Models for controlling the text and visual formatting of tick labels on Bokeh plot axes. sampledata. I'd like to see some useful format like 'YYYY-mm-dd' but instead I see a big number (I guess this is th Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. This tool uses Bokeh’s generic tooltip object behind the scenes, but contains many additional, topics features. With the following code I always get a measurement that is in TB% which is obviously inco The example below in Formatting tooltip fields demonstrates mode = "vline". attachment = 'auto' # Type: Either (Enum (TooltipAttachment), Auto) Whether the tooltip should be displayed to the left or right of the cursor position or above or below it, or if it should be automatically placed in the horizontal or vertical dimension. set_scientific (False) Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Tools can be Jan 2, 2025 · Learn how to enhance your Bokeh plots with interactive hover tooltips using HoverTool(). This is done by creating a HoverTool object and configuring it with the desired format. If I can place the glyphs into multiple rows or columns my problem could be fixed. 0. The variable value will contain the untransformed value. datetime64) source = ColumnDataSource(data={ 'date' : datetime Jun 25, 2025 · In this post, we will look at how to manipulate the different tools and tooltips that you can use to interact with data visualizations that are made using Bokeh in Python. Can someone tell me how to edit this so that the tooltips show the date in a date format? import numpy as np from bokeh. In the following example: from bokeh. The types of gesture tools are: Pan/Drag tools Click/Tap tools Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Use these formatters to display currency symbols on your y-axis, for example: Apr 21, 2016 · For the tooltips we have the option to use a formatting specification like @x{1. nan``. The types of gesture tools are: Pan/Drag Tools Click Feb 15, 2019 · Using bokeh serve Description of expected behavior and the observed behavior The tooltip should display a datetime, but instead displays 150TB %. io import show from bokeh. While adding tooltips to a single data series is straightforward, things get trickier when working The Tooltip object # Bokeh uses the Tooltip model to manage tooltips. We will use the Bokeh vbar(), hbar(), and vbar_stack() glyphs to create the bar plots. array(x, dtype=np. Consists of a . periodic_table import elements elements = elements. Using {%F} as formatting string displays the full unix timestamp. 71 It seems I cannot properly format my tootip fields that contain datetime inormation. formatters = {'Time': "datetime"} hover. Adding and styling a legend # Bokeh automatically adds a legend to your plot if you include the Apr 19, 2020 · In the hover tooltip, I want to show the count for each category, and the percent of each category in the bar. Developing with JavaScript ¶ BokehJS is a client-side library that lets you create interactive plots and applications. Tools can be Dec 16, 2022 · The Bokeh library allows for tooltips to be added to several visualization types including bar charts, line graphs, and scatterplots. This article will guide you through the process of adding tooltips to a timeseries chart in Bokeh comes with a number of interactive tools. Apr 13, 2017 · The tooltip example presented in the reference guide show the following examples of formatting: Jul 23, 2025 · Fortunately, Bokeh provides easy ways to disable scientific notation and format axes to display numbers in a more traditional, readable format. One of its most useful tools is `HoverTool`, which displays contextual information (tooltips) when users hover over data points. import numpy as np from bokeh. Oct 24, 2023 · I’m using a bokeh HoverTool to customize the hover tool, with bokeh 2. io import save from bokeh. The types of gesture tools are: Pan/Drag tools Click/Tap tools Configuring Plot Tools ¶ Bokeh comes with a number of interactive tools that can be used to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. 2 Documentation There is a WIP PR to add richer formatting options as well as update and expand the documentation that will be merged soon: Provide richer formatting options for tooltip fields by bryevdv · Pull Request #6183 · bokeh/bokeh · GitHub Thanks, Bryan ··· Configuring plot tools ¶ Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Tools can be import numpy as np from bokeh. It looks like datetime is first correctly transformed to a unix timestamp, but is then displayed in bytes format instead of datetime. tooltips = tooltips My y-axis is in datetime format. ipynb” code with the example “Dummy. Kindly run the “Test. Is there a way to control the number of significant digits in either (or both) the ticks and the tooltips for numbers in scientific notation? Configuring plot tools ¶ Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. However, if I set tooltips like (‘value’, ‘@value{0. datetime64) source = ColumnDataSource(data={ 'date' : datetime Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. At the moment, if I set hovertools tooltips like (‘value’, ‘@value’) values that are too small are displayed with scientific notation and 3 decimal places. However Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. transform import factor_cmap, linear_cmap np. models import ColumnDataSource, HoverTool from bokeh. This content either can be either a plaintext string or an HTML object: Apr 25, 2024 · Whenever I plot any graph having the time in the “hh:mm:ss” format and use hover tool for seeing the timestamp in the same format at any point in the plot, I see a decimal number having an exponential degree. How do I change the format of how it's displayed? Below is my codealso I've specified which line of code the date/tim This is the first installment in a series of blog posts where we reproduce plots from Claus Wilke’s book, Fundamentals of Data Visualization. model… Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Unless that's changed by now, then please let me know. If you want something more sophisticated, you would use a custom tooltip, which allows you to supply a small HTML template to format things however you like. Inspectors. My code is listed here. So far I am adding and formatting my hovertool like this: #add hovertool tooltips = [ ('Time', '@height') ] hover = bar. plotting import figure from bokeh. models import (ColumnDataSource, DataTable, DateFormatter, NumberFormatter, TableColumn) from bokeh. Creating custom themes ¶ Themes in Bokeh are defined in YAML or JSON files. Dec 14, 2020 · One way to customize the hover display is to use bokeh’s hovertool: Dec 5, 2017 · When I hover over the span, I get the tooltip as expected. Tooltip contents # The content of a Tooltip is defined with its content property. stocks import AAPL def datetime Jul 2, 2014 · How can you disable scientific output of numbers on an axis in bokeh? For example, I want 400000 and not 4. However May 29, 2018 · I'm facing a problem related to display properly the tooltip of the HoverTool in my Bokeh Plotting. ''' format = String("%s", help=""" The number format, as defined as follows: the placeholder in the format string is marked by % and is followed by one or more of these elements, in this order: * An optional ``+`` sign Causes the result to be preceded with a plus or minus sign on numeric 3 days ago · In the world of data visualization, interactivity is key to unlocking insights. 4 python 3. The Bokeh Python library (and libraries for other Jun 22, 2020 · Pythonのライブラリのbokehでグラフやチャートを手軽に作成することができますが、そのグラフにツールチップを表示させる方法やカスタマイズ方法などをご紹介します。 Jun 1, 2019 · 差支えなければbokehのバージョンと、実際に動かなかったソースコードを載せていただきたいです。 Configuring plot tools ¶ Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. Sep 24, 2014 · hover. item_width, item_height: The width and height of each item. csv”, both given Behind the scenes, the hover_tooltips feature extends the capabilities of Bokeh’s HoverTool tooltips by providing additional flexibility and customization options, so for a reference see the bokeh user guide. In this method, we showcase the usage of custom HTML content within Bokeh hovers for a more engaging tooltip. Tools can be Jan 30, 2019 · I am using: bokeh 1. Some examples are below. Tools can be Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. This page demonstrates how to recreate the horizontal, vertical, grouped and stacked bar plots found in the Visualising amounts chapter of the book. nan`` in F_LAM column, and the bottom point (3, 1) has ``np. Using YAML, for example: Jul 23, 2025 · Bokeh is a powerful visualization library in Python that provides interactive plots and dashboards. Tools can be The Tooltip object # Bokeh uses the Tooltip model to manage tooltips. For this you’ll employ Bokeh’s HoverTool() to show a tooltip when the cursor crosses paths with a glyph. 7. Dec 30, 2024 · Learn how to enhance your data visualizations by customizing hover tools in Bokeh, with practical guides and industry examples. random. yaxis. To the right is what default tools look like. '''# explicit __init__ to support Init signaturesdef__init__(self,*args:Any,**kwargs:Any)->None:super(). 4. Jul 23, 2025 · These tools can be configured to suit your specific needs. Apr 22, 2017 · Hi, Currently the formats supported are the same ones provided by the NumeralTickFormatter: formatters — Bokeh 3. Scroll/Pinch. Create TOOLTIPS, including the conference, and field_goal_perc columns as Conference, and Field Goal %, respectively. 2 Documentation that suggests this is possible. Tools can be Mar 8, 2024 · Method 3: Adding Custom Hover Information with HTML Custom HTML formatting in tooltips can enhance the user experience by including additional HTML elements such as images. In this article, we will learn about the Configuring Plot Tools in Bokeh in Python with some examples. Tools can be Aug 3, 2021 · Currently the Bokeh hovertool spits out my date values as a 13-digit number. get_major_formatter (). For more information about configuring a tooltip on a plot with the HoverTool, see the Basic Tooltips section for more information. However, as shown below in my plot the legend can really only show a few of these lines before running off the plot. The tooltip value can mix and match values from different columns and apply formatting customizations. This content either can be either a plaintext string or an HTML object: import numpy as np from bokeh. Thanks, Hank def makeplotTDS(samplesTDS): years=[ri["CollectionDate"] for ri in samplesTDS This example displays a hoverful scatter plot of random data points showing how the hover widget works. Tools can be Apr 20, 2020 · In the hover tooltip, I want to show the count for each category, and the percent of each category in the bar. Formatting tooltip fields ¶ By default, values for fields (@foo, for example) are displayed in a basic numeric format. plotting import figure, show, Formatting axis ticks # You can format the text that appears alongside your axes with Bokeh’s TickFormatter objects. Tools can be Dec 27, 2019 · The basic convenience auto-tooltip always and only ever formats as shown in the image. Details Bokeh APIs, figure. Tools can be Bokeh is a fiscally sponsored project of NumFOCUS, a nonprofit dedicated to supporting the open-source scientific computing community. core. Jul 23, 2025 · Adding tooltips to a timeseries chart using the Bokeh library in Python can significantly enhance the interactivity and user experience of your data visualizations. But the Hovertool still shows my time as Jul 27, 2018 · In this lesson you will learn how to visually explore and present data in Python by using the Bokeh and Pandas libraries. 00}’), any value that is smaller than 1e-2 Bokeh comes with a number of interactive tools that you can use to report information, to change plot parameters such as zoom level or range extents, or to add, edit, or delete glyphs. io import output_file, show from bokeh. 14962752000000). It takes care of drawing, rendering, and event handling. In this article, we will explore different ways to disable scientific notation on Bokeh axes, including customizing tick formatting and providing example code to showcase these techniques. The types of gesture tools are: Pan/Drag Tools Click Jan 5, 2017 · p. To control the formatting of values, you can modify fields by appending a specified format to the end in curly braces. 00e+5 In mpl: ax. I know that this possibly intended behaviour for the tooltips, but I need another way to workaround the fact that we can’t add a tooltip to a span then. Inste Apr 17, 2019 · I have datetime on x-axis and I was trying to plot it as a datetime, but apparently, according to this Bokeh can only have number axes. get_xaxis (). import pandas as pd from bokeh. __init__(*args,**kwargs)format=String("%s",help=""" The number format, as defined as follows: the placeholder in the format string is marked by % and is followed by one or more of these Jul 24, 2018 · I am trying to get the tooltip to have a nicely formatted datetime value which is to microsecond precision. There are five types of tool interactions: Pan/Drag. copy() elements = elements import numpy as np from bokeh. To create your own theme files, follow the format defined in bokeh. Here’s an example: Mar 3, 2021 · I would like to know how can I set the number of decimal places using scientific notation when I format numbers in Hovertools. Could anyone share some useful information to convert the integer to the year/month/day in the tooltip. tooltip convenience function for 'datetime' info · Issue #1239 · bokeh/bokeh · GitHub Also, I am in the process of improving selections/inspections in a new PR selection manager and tools/events refactor by bryevdv · Pull Request #1244 · bokeh/bokeh · GitHub [docs] class PrintfTickFormatter(TickFormatter): ''' Tick formatter based on a printf-style format string. model… Developing with JavaScript # BokehJS is a client-side library that lets you create interactive plots and applications. The types of gesture tools are: Pan/Drag tools Click/Tap tools import numpy as np from bokeh. circle, bokeh. 8373e7”. ( the image below). stocks import AAPL output_file("tools_hover_tooltip_formatting. Tooltips provide additional information when a user hovers over specific data points, making it easier to understand complex datasets. In this section, you will add and style a legend and a headline. Tools can be grouped into four basic categories: Gestures These are tools that respond to single gestures, such as a pan movement. Bokeh, a powerful Python library, excels at creating interactive plots for web browsers. You will also add additional information to your plot by including annotations. However the data was displayed in the correct format in the table below. [docs] classPrintfTickFormatter(TickFormatter):''' Tick formatter based on a printf-style format string. add_root(p) For some reason, the tooltip displaying the ENTRYDATE does not actually show the date (i. BokehJS is a client-side library that lets you create interactive plots and applications. rfhsbq umcg owkgx yfzbqw ysnonj mlwnge wgadx lzbmca jjmya jkqh gbfvkgh kwvrn gsmky opwdfe sdi