Skip to content

PEP 701: Correct link to nested interpolation strings #2933

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Dec 19, 2022
Merged

PEP 701: Correct link to nested interpolation strings #2933

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
07c3fdb
PEP 701: Correct link to nested interpolation strings
pablogsal Dec 19, 2022
4832e82
Update pep-0701.rst
pablogsal Dec 19, 2022
1e38b3b
Update pep-0701.rst
pablogsal Dec 19, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 16 additions & 4 deletions pep-0701.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -55,8 +55,22 @@ Some of these limitations (collected originally by :pep:`536`) are:
SyntaxError: f-string expression part cannot include '#'

#. Arbitrary nesting of expressions without expansion of escape sequences is
available in every single other language employing a string interpolation
method that uses expressions instead of just variable names, `per Wikipedia`_.
available in many other languages that employ a string interpolation
method that uses expressions instead of just variable names. Some examples:

.. code-block:: text

# Ruby
"#{ "#{1+2}" }"

# JavaScript
`${`${1+2}`}`

# Swift
"\("\(1+2)")"

# C#
$"{$"{1+2}"}"

These limitations serve no purpose from a language user perspective and
can be lifted by giving f-literals a regular grammar without exceptions
Expand Down Expand Up @@ -355,8 +369,6 @@ Footnotes

.. _presented at the Python Language Summit 2022: https://pyfound.blogspot.com/2022/05/the-2022-python-language-summit-f.html

.. _per Wikipedia: https://en.wikipedia.org/wiki/String_interpolation#Examples

.. _implementation: https://github.com/we-like-parsers/cpython/tree/fstring-grammar


Expand Down