#505: t-strings in Python (PEP 750)

Talk Python To Me

Michael Kennedy

Technology

4.8 • 635 Ratings

🗓️ 13 May 2025

⏱️ 72 minutes

🔗️ Recording | iTunes | RSS

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Summary

Python has many string formatting styles which have been added to the language over the years. Early Python used the % operator to injected formatted values into strings. And we have string.format() which offers several powerful styles. Both were verbose and indirect, so f-strings were added in Python 3.6. But these f-strings lacked security features (think little bobby tables) and they manifested as fully-formed strings to runtime code. Today we talk about the next evolution of Python string formatting for advanced use-cases (SQL, HTML, DSLs, etc): t-strings. We have Paul Everitt, David Peck, and Jim Baker on the show to introduce this upcoming new language feature.

Transcript

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0:00.0	Python has many string formatting styles, which has been added to the language over the years.
0:04.3	Early Python used the percent operator to inject formatted values into strings,
0:09.0	and we have string.format, which offers several powerful styles.
0:13.7	Both were verbose and indirect, so f-strings were added in Python-36,
0:18.5	but these f-strings lacked security features, think little Bobby tables,
0:22.7	and they manifested as fully formed strings to runtime code. Today we talk about the next
0:28.3	evolution of Python string formatting for advanced use cases, think SQL, HTML, DSLs, and so on,
0:35.4	T-strings. We have Paul Everett, Dave Peck, and Jim Baker on the show to introduce the upcoming language feature.
0:43.5	This is Talk Pythoner Me, episode 505, recorded May 13th, 2025.
0:49.3	Are you ready for your host? There is.
0:52.0	You're listening to Michael Kennedy on Talk Python to Me.
0:55.4	Life from Portland, Oregon, and this segment was made with Python.
1:01.4	Welcome to Talk Python to Me, a weekly podcast on Python.
1:05.1	This is your host, Michael Kennedy.
1:07.2	Follow me on Massidon, where I'm at M. Kennedy, and follow the podcast using at Talk
1:11.8	Python, both accounts over at Fostodon.org, and keep up with the show and listen to over nine
1:17.7	years of episodes at TalkPython.fm. If you want to be part of our live episodes, you can find
1:23.2	the live streams over on YouTube, subscribe to our YouTube channel over at TalkPython.fm slash
1:28.4	YouTube and get notified about upcoming shows. This episode is sponsored by Posit
1:33.5	Connect from the makers of Shiny. Publish, share, and deploy all of your data projects that you're
1:38.4	creating using Python. Streamlet, Dash, Shiny, Boca, Fast API, Flask, Quarto, reports, dashboards, and APIs.
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	...

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