Python

Template Strings in Python 3.14: An Unnecessary New Feature?

An honest review of its usage and potential

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The incoming Python 3.14 didn’t have any big syntax updates until there was a surprising resolution on 10 April 2025 from the Python Foundation:

The template string(t-string) syntax (suggested by PEP 750) was accepted as a new feature in Python 3.14.

To be honest, I was confused when I heard this news.

There are already many string formatting methods in Python, to name a few:

• C-style formatting with “%” operators: an old-school method
• The .format() function: a popular method before f-strings was introduced by Python 3.6
• F-string: a preferred way for many developers due to its convenience and elegance

So why another string formatting syntax?

The Purpose of T-Strings

Simply put, it is to solve the security issues that arise with the f-strings when dealing with in-string expressions.

For example, constructing an SQL query with an f-string as follows is dangerous:

sql = f"SELECT info FROM users WHERE name = '{user}'"