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How to use highlight function in Pygments.

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by l.rohitharohitha2001@gmail.com dot icon Updated: Dec 4, 2023

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Pygments is a syntax highlighting Python library. It helps to add color and formatting to code snippets in various programming and markups.


Pygments helps in text editors, integrated development environments (IDEs), and documentation generators.   

   

Key Points on Pygments:   

  1. Customization: The customization options for styles enable users to tailor. The flexibility in output formats, such as HTML, LaTeX, RTF, and ANSI sequences.   
  2. Integration: Pygments' integration capabilities with text editors, IDEs, and development tools. This ensures seamless syntax highlighting in coding environments.   
  3. Installation and Setup: It Emphasizes the importance of keeping Pygments up to date for access.   
  4. Styles and Formatting: The availability of built-in styles and how users can choose.   
  5. Command-Line Interface (CLI): Introduce the Pygments command-line interface as a quick testing tool. It Provides an example command for basic usage to encourage experimentation.   
  6. Third-Party Plugins: It explores third-party plugins and extensions to enhance Pygments languages. It Highlights the active community contributing to the Pygments ecosystem.   
  7. Practical Tips: Ensures effective use, including choosing the right lexer, etc.   
  8. Embedding in Web Pages: The Touch on the option of embedding Pygments-highlighted HTML.   
  9. Documentation Reference: It Encourages users to refer to the comprehensive Pygments documentation. It Emphasizes the importance of exploring the documentation for advanced usage and troubleshooting.   
  10. Community Engagement: It is participation for staying updated on developments and seeking. It Encourages contributions to the community and the sharing of custom lexers.   

   

In conclusion, leveraging Pygments in your coding workflow can significantly enhance both productivities. The importance of using Pygments extends beyond mere syntax highlighting. It becomes a powerful tool that contributes to a more efficient and visual.   

Fig: Preview of the output that you will get on running this code from your IDE.

Code

In this solution we are using pygments library of Python.

special non-syntactic highlighting in Pygments

PythondotLines of Code : 37dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
from pygments import token
from pygments.lexer import inherit
from pygments.lexers import Python3Lexer, SwiftLexer


# create a new token and associate with it a new short style name
token.STANDARD_TYPES[token.Token.Balloon] = "balloon"
Balloon = token.Token.Balloon


# create a callback which ignores the special § characters
def process_balloon(_, match):
    yield match.start(), Balloon, match.group(1)


# subclass the Python 3 lexer to identify ballooned text
# when subclassing, the tokens dictionaries will be merged
class Python3BalloonLexer(Python3Lexer):
    tokens = {
        "root": [(r'§(.*?)§', process_balloon),  # balloons are processed first
                 inherit]  # and then merge the superclass tokens here
    }

# do the same for the Swift language with a one-liner
class SwiftBalloonLexer(SwiftLexer):
    tokens = { "root": [(r'§(.*?)§', process_balloon), inherit] }


# example output below
from pygments import highlight
from pygments.formatters import HtmlFormatter
my_lexer_python = Python3BalloonLexer()
my_lexer_swift = SwiftBalloonLexer()
print(highlight('print(§"Hello World"§)', my_lexer_python, HtmlFormatter()))
print(highlight('§label name§: while §condition§ {\n  §statements§\n}', 
      my_lexer_swift, HtmlFormatter()))

Instructions


Follow the steps carefully to get the output easily.


  1. Download and Install the Jupyter Notebook on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Create a new Python file on your Notebook.
  4. Copy the snippet using the 'copy' button and paste it into your Python.
  5. Run the current file to generate the output.


I hope you found this useful.


I found this code snippet by searching for 'special non-syntactic highlighting in Pygments' in Kandi. You can try any such use case!


Environment Tested



I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. Jupyter Notebook (anaconda 3) 6.0.1 Version
  2. The solution is created in Python 3.8 Version
  3. Pygments 2.17.2 Version.


Using this solution, we can be able to use highlight function in Pygments with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to use highlight function in Pygments.

Dependent Library


pygmentsby pygments

Python doticonstar image 1311 doticonVersion:2.15.1doticon
License: Permissive (BSD-2-Clause)

Pygments is a generic syntax highlighter written in Python

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            pygmentsby pygments

            Python doticon star image 1311 doticonVersion:2.15.1doticon License: Permissive (BSD-2-Clause)

            Pygments is a generic syntax highlighter written in Python
            Support
              Quality
                Security
                  License
                    Reuse

                      You can search for any dependent library on kandi like 'pygments'.

                      FAQ   

                      1. What is the purpose of pygmentize -f html?   

                      The pygmentize -f html command is a part of the Pygments library's command lines. It helps to generate syntax-highlighted code in HTML format.   

                      • -l Python specifies the lexer for Python code.   
                      • -f html specifies the output format as HTML.   
                      • -o output.html specifies the output file.   
                      • input.py is the file containing the Python code that needs highlighting.   


                      2. How does markup work with Pygments highlight () to create a syntax highlighter?   

                      In Pygments, highlight () function applies syntax highlighting to a code snippet or file. It works with markup languages such as HTML. The highlight () function also generates syntax-highlighted code within the context.   

                         

                      3. What are some examples of Python code that Pygments can highlight?   

                      Pygments supports syntax highlighting for a wide range of programming languages, including Python.   

                      • Basic Python Script   
                      • Conditional Statements   
                      • Function Definition   
                      • List Comprehension   
                      • Class and Object   
                      • Exception Handling   
                      • Importing Modules   
                      • String Manipulation   
                      • Dictionary and Loop   
                      • File Handling   

                         

                      4. How does a code snippet get passed into highlight () to create a formatted document?   

                      In Pygments, the highlight () function applies syntax highlighting to a code.   

                      • The code variable contains a Python code snippet.   
                      • The get_lexer_by_name("python") call obtains the Python lexer.   
                      • The HTML Formatter () creates an HTML formatter.   
                      • highlight (code, lexer, formatted) applies syntax highlighting, and the result it.   

                         

                      5. What formatting and styling control does Pygments Highlight () offer??   

                      Pygments provide a significant degree of control over formatting and styling options. It can customize the appearance of the highlighted code through various options.   

                      • Choosing a Formatter   
                      • Styling Options   
                      • CSS Styles and Classes   
                      • Line Numbers and Anchors   
                      • Background Color   
                      • Wrapping Lines   
                      • Adding Line Spans   


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