New submission from Pekka Klärck <[email protected]>:
If I have two strings that look the same but have different Unicode form, it's
very hard to see where the problem actually is:
>>> a = 'hyv\xe4'
>>> b = 'hyva\u0308'
>>> print(a)
hyvä
>>> print(b)
hyvä
>>> a == b
False
>>> print(repr(a))
'hyvä'
>>> print(repr(b))
'hyvä'
This affects, for example, test automation frameworks using `repr()` in error
reporting. For example, both unittest and pytest report
`self.assertEqual('hyv\xe4', 'hyva\u0308')` like this:
AssertionError: 'hyvä' != 'hyvä'
- hyvä
+ hyvä
Because the NFC form is used by strings by default, I would propose that
`repr()` would show the decomposed form if the string is in NFD. In practice
I'd like `repr('hyva\0308')` to yield `'hyva\0308'`.
----------
messages: 315504
nosy: pekka.klarck
priority: normal
severity: normal
status: open
title: `repr()` of string in NFC and NFD forms does not differ
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Python tracker <[email protected]>
<https://bugs.python.org/issue33317>
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