How to create a hyperlink with a Label in Tkinter?
Tkinter Label widgets are generally used to display text or images. In this example, we will see how to add a hyperlink on a Label widget in an application.
In order to add a hyperlink, we can bind the label text with a button that makes it clickable. The open_new(url) method is used to define the function that opens a web browser to follow the link. The open_new(url) method is defined in the webbrowser module in Python which can be imported in the notebook using 'import webbrowser'.
Linking Reference
Targets are very flexible in that they support virtually any style you can with regular HTML (relative or absolute paths, anchors, etc).
Linking
Properly-formed URLs (i.e. http://example.net), InterWiki pages, email addresses, and CamelCase pagenames are automatically recognized as targets even without using brackets.
Embedding
Embedding/Transclusion is used if you want to include an external file within your wiki. Most commonly, this will be a graphic. But it can also be a text file or any other file that the wiki understands, including video. Additional options can be combined (for example, you can provide link for downloading and display the contents of that file on the page!).
Explanations
-
put a space after the URL,
The supported URL schemes are: http, https, ftp, file and some others. The administrator of your wiki can extend the supported schemes by using the url_schemas variable (see HelpOnConfiguration).
In addition to the standard schemes, there are MoinMoin-specific ones: attachment and drawing, these are related to file attachments and are explained on HelpOnActions/AttachFile.
Spaces
You can use double-brackets (or double-braces) syntax to link to a page or file name with spaces. This will even work for interwiki links, provided the target wiki understands standard url quoting (spaces will become %20).
However, best practice is to try to avoid spaces in URLs, as you may find it’s more difficult to work with that URL. For example, if you try copying and emailing that URL link, the receiver may have difficulty landing on the page you specified.
Anchors
To insert anchors into a page you need the Anchor macro (see HelpOnMacros): <<Anchor(anchorname)>>, where «anchorname» is the actual identifier of the anchor.
To link to an anchor on the same wiki page use [[#anchorname]] or [[#anchorname|label text]].
To link to an anchor on another wiki page write [[PageName#anchorname]] or [[PageName#anchorname|label text]], where «PageName» is the name of the other page and «anchorname» is the identifier of the anchor on that page.
Preventing Automatically Generated Links
To keep a word like PageName from automatically being turned into a link, you can suppress CamelCase linking by putting an exclamation mark (!) before the word, i.e. !PageName. This method will not interfere with most searches (the exception is certain quoted phrases and regular expressions).
Alternatively, you can insert two back-ticks Page``Name. However, the problem with doing this is that it will prevent a simple search for the word «PageName» from matching Page``Name in a page, due to the inserted characters.
To prevent automatic URL linking, use either `http://. ` or <<
Using link parameters
Sometimes you may want to give additional parameters for a link, influencing how it looks like, how it behaves and how exactly it links to the target — this is what the params part of [[target|text|params]] is for.
e.g. if you want a direct download link you want to enter as param &do=get [[attachment:HelpOnImages/pineapple.jpg|a pineapple|&do=get]] a pineapple
Setting attributes of the <a> tag
Available attributes: class, title, target, accesskey (see some html reference if you want to know what they mean).
Example: [[http://moinmo.in/|MoinMoin Wiki|class=green dotted,accesskey=1]]
Pressing the access key should jump to that link target (for Firefox 2.x and the example above it is Alt-Shift-1).
Creating a query string for the target URL
What is possible for this depends on the target site.
Example: [[MoinMoin:MoinMoinWiki|MoinMoin Wiki|&action=diff,&rev1=1,&rev2=2]]
Images
to have the attached file imagefile.png displayed with a width of 100px; the graphics’ height will be reduced/ enlarged proportionally (e.g. if imagefile.png was actually 200px width and 400px heigh, height would be reduced in this example to 200px). You may also use
to have the attached file imagefile.png displayed with a height of 100px, and the graphics’ width will be reduced/ enlarged proportionally. Use
to have the attached file imagefile.png displayed with a width of 100px and a height of 150px. Please do not omit the alternative text in neither case.
Note this does not alter the attached file itself, in only makes the browser scale the image down/ up to the value given while displaying it.
creating hyperlinks in python
I have a log file in which some test commands and their status (Pass/Fail) are logged using python. Now I want that test commands should not be written as simple text but should be written as hyperlinks. So that when I click on them another files which are linked to them are opened.
Now I want that the CommandName written in logfile.log should be a hyperlink for the file TestCommand.log So that when I click on the CommandName the file TestCommand.log opens.
Can you please suggest how should I do create a logfile.log with hyperlinked CommandName and then how should I link this hyperlinked CommandName to the file TestCommand.log??
3 Answers 3
You seem to be a bit confused about what a hyperlink, well, is.
A text file is a file containing text. (It’s simple, but it needs to be said!) It doesn’t have pictures, animations, colours, headers, or anything like that. It’s just text.
Since people often want more data with their text (x should be a heading, y should be red, z should make a funny cursor when you mouse over it), there are many schemes for encoding data about text. For example, Markdown is a text format used by StackOverflow. HTML is a markup language (a way of annotating text) that uses <tag> elements. It’s useful because web browsers can take HTML pages as input and display them graphically.
A hyperlink as you describe it is a graphical element such as you might find on a website. You can’t have them in a text file, because a text file is just text. But you can instruct a web browser to display a hyperlink by writing
How to Create a Clickable Link(s) in Pandas DataFrame and JupyterLab
Here are few different approaches to create a hyperlink in Pandas DataFrame and JupyterLab:
(1) Pandas method: to_html and parameter render_links=True :
(2) Create clickable link from single column in Pandas DataFrame:
(3) Create hyperlink from name and URL in Pandas with apply :
In the next section, We’ll review the steps to apply the above examples in practice.
Step 1: Create a Hyperlink with to_html and render_links — multiple columns
The first example to cover will create links from all columns which contain valid URL-s with option — render_links .
Parameter render_links is from boolean type and has default False.
So let’s create a DataFrame with two columns:
- name
- url
- ur2
to render all links from this DataFrame we can use the next syntax:
DataFrame contains hyperlinks:
| name | url | url2 | |
|---|---|---|---|
| 0 | Softhints | https://www.softhints.com | https://www.blog.softhints.com/tag/pandas |
| 1 | DataScientyst | https://datascientyst.com | https://datascientyst.com/multiindex |
As you can see from the table above all URLs are rendered as links.
Step 2: Create a new hyperlink column as combination of others columns in Pandas
In this example we can see how to create a method which is going to convert:
- name
- url
from two columns of Pandas DataFrame to a new column with a short hyperlink.
Let’s say that our DataFrame has two values — name and url .
To create a new column which is a shortened hyperlink we can make a function. Then we can use method format of style in order to apply the function to different columns — given as a dict:
| name | url | |
|---|---|---|
| 0 | Softhints | https://www.softhints.com |
| 1 | DataScientyst | https://datascientyst.com |
To use only the URL without the name we can build another function:
Creating a new clickable column which is a combination from the other columns of the same DataFrame:
Step 3: Create hyperlink from URL using lambda and to_html(escape=False)
Finally, let’s see how to combine lambda and to_html(escape=False) to create a clickable link in DataFrame.