[issue47023] re.sub shows key error on regex escape chars provided in repl param

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

There seem to be a number of escaping problems in the OP's example.

Is this what was intended?

>>> re.sub(r"\{(\w+)\}", r"\1", "Hello! {user}")
'Hello! user'

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nosy: +rhettinger
status: pending -> open

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue47023>
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