A curated list of resources, tools, libraries, and examples for Python's Template Strings (t-strings) introduced in Python 3.14

Template strings (t-strings) are a powerful new Python feature defined in PEP 750 that extends f-strings with programmable string processing capabilities. They enable safer string interpolation, prevent injection attacks, and allow for custom domain-specific languages.

• What are T-Strings?
• Official Resources
• Development Tools
  • Linting & Static Analysis
  • Type Checking
  • IDE Extensions
  • Environment & Installation
• Libraries & Frameworks
  • Database & SQL
  • Utilities
• Learning Resources
  • Tutorials & Videos
  • Community Discussions
• Getting Started
• Related
• Contributing

Template strings (t-strings) are a new Python feature that provide programmable string interpolation. Unlike f-strings which immediately produce a string, t-strings return a structured template object that can be processed by custom functions. This enables:

• Security: Prevent injection attacks through controlled processing
• Flexibility: Create custom DSLs for any domain (SQL, HTML, logging, etc.)
• Rendering control: Interpolations evaluate eagerly, and Template objects keep literal segments plus evaluated values separate via .strings, .interpolations, and .values so downstream renderers can combine them explicitly and safely
• Type checking: Growing support in type checkers

# Template strings use 't' prefix instead of 'f'
template: Template = t"Hello {name}"

# HTML auto-escaping example
# Note: html() is a hypothetical function from PEP 750, not part of stdlib.
# See https://github.com/t-strings/pep750-examples for a working implementation.
evil = "<script>alert('evil')</script>"
template = t"<p>{evil}</p>"
assert html(template) == "<p>&lt;script&gt;alert('evil')&lt;/script&gt;</p>"

# HTML attributes from dictionary
attributes = {"src": "shrubbery.jpg", "alt": "looks nice"}
template = t"<img {attributes} />"
assert html(template) == '<img src="proxy.php?url=shrubbery.jpg" alt="looks nice" />'

# Accessing template components
name = "World"
template = t"Hello {name}"
assert template.strings == ("Hello ", "")
assert template.interpolations[0].value == "World"
assert template.interpolations[0].expression == "name"

Learn more in PEP 750.

• PEP 750: Template Strings - The official specification defining t-strings syntax and semantics
• Template strings docs (string.templatelib) - Canonical documentation for the Template API in 3.14
• Python 3.14.0 - Official release with template string support
• PEP 745: Python 3.14 Release Schedule - Official timeline for 3.14.0, released October 7, 2025
• Python 3.14 documentation - Latest docs covering template strings and string.templatelib
• t-strings.help - Documentation and help site maintained by the PEP 750 core team

• t-linter - Comprehensive linting tool for t-strings with IDE integrations
  • PyPI Package - pip install t-linter

• Pyright 1.1.402 - Upstream release with first-class PEP 750 template string analysis (no fork required)
• mypy 1.19.1 release notes - Fails gracefully on unsupported template strings while full checking support is developed

• VS Code T-Linter - Syntax highlighting, linting, and IntelliSense for t-strings
• PyCharm T-Linter Plugin - Full IDE support for JetBrains products (Source)

• uv - Fast Python package manager with built-in Python version management
• Python Docker Images - Official Python images (3.14 tags available)
• CPython Source - Build Python 3.14 from source

• sql-tstring - Safe SQL query building with t-strings, including optional clause rewriting and dialect support (pip install sql-tstring)
• t-sql - Lightweight SQL templating that turns t-strings into parameterized queries, supporting qmark, numeric, named, format, and pyformat styles on Python 3.14+
• psycopg 3 template string queries - Template string query execution in psycopg 3.3, supporting parameterized queries with t-strings (pip install psycopg[binary])
• ludic - Lightweight HTML templating library and web framework with t-strings support

• better-dedent - Enhanced string dedenting for cleaner template formatting
• pyhtml-enhanced - Build HTML documents in type-safe Python with a simple and learnable syntax, including t-string support
• tdom - A 🤘 rockin' t-string HTML templating system for Python 3.14 by co-author team.
• tstr - Cross-version compatible t-strings with backport support for older Python versions, plus utilities for rendering, interpolation handling, and extensions for HTML escaping, SQL, and logging.
• tstring-structured-data - Parser-first JSON, TOML, and YAML backends for t-strings with Rust-powered validation, supporting both parsed data and formatted text output.
• tstring-util - Rendering helpers for Template objects, including lazy !fn handlers plus safe splitting and path utilities
• regex-template - Auto-escapes regular expression interpolations

• Python Template Strings Introduction - Video tutorial on t-strings basics
• Template Strings Advanced Usage - Advanced patterns and use cases

• Language hints for PEP 750 - Discussion on syntax highlighting and language detection
• PEP 750 template strings new updates - Latest updates and changes to the specification
• Template strings in stdlib logging - Integration with Python's logging module
• Original PEP 750 discussion - Initial proposal and community feedback
• Convert function for string.Template - Bridging classic templates with t-strings

To start using t-strings, you'll need Python 3.14 or later:

# Using uv package manager
uv python install 3.14

# Using Docker
docker run -it python:3.14

# Build from source
git clone https://github.com/python/cpython.git
cd cpython
git checkout v3.14.0
./configure --enable-optimizations
make -j4  # Or use $(nproc) on Linux, $(sysctl -n hw.ncpu) on macOS
sudo make altinstall

• PEP 787: Safer Subprocess Usage - Deferred to Python 3.15; proposes t-strings support for subprocess/shlex
• Python f-strings - The predecessor to t-strings
• Template Literal (JavaScript) - Similar concept in JavaScript
• Tagged Template Literals - JavaScript's equivalent feature

Contributions are welcome! Please read our Contributing Guidelines before submitting PRs.

1. Check for existing entries before adding new ones
2. Test all code examples with Python 3.14+
3. Verify all links are working
4. Follow the established format
5. Add meaningful descriptions

See CONTRIBUTING.md for detailed guidelines.

This work is licensed under a Creative Commons Zero v1.0 Universal License.