Vinay Sajip added the comment:
It's not a bug - the reason it's like that is that it allows conversion and
format specifiers to be given - {field_name!conversion:format_spec}.
Of course a more robust solution using regular expressions could be
implemented, but it's not really worth it. If there's a misspelt field name,
generally you'll know because there will either be an exception raised, or (in
production) no output will be produced.
----------
resolution: -> invalid
status: open -> closed
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17199>
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