Eric V. Smith added the comment:
This task is actually pretty difficult, and is going to require some major
surgery to unparse.py.
Unfortunately, until it's fixed, you can't use f-strings in the stdlib or in
stdlib tests.
Particularly challenging are nested f-strings like:
f'{f"{0}"*3}'
Getting the quoting right will be hard, and will likely require passing another
parameter around to all of the dispatch functions. Or maybe just some local
state, similar to the indent level (_indent) which is already being tracked.
----------
components: +Demos and Tools
nosy: -python-dev
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<http://bugs.python.org/issue25180>
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