Odoo no longer supports python 2, thus some of these helpers can and
have been replaced by python 3 built-ins, therefore there is no need for
them to stay defined.
The removed helpers are:
* izip, imap and ifilter
* unichr, text_type
* implements_to_string, implements_iterator
* string_types, integer_types
* to_native
The python 2 shims have also been removed, and only the python 3 helpers
have been kept, because they can still be usable (i.e. accepting
both bytes and str for functions that can only accept one of the two)
[REM] pyjsparser: remove PY3 shims
They're no longer necessary as Odoo doesn't officially support python 2
anymore.
closesodoo/odoo#28519
The class PoFile was already using it.
TextIOWrapper closes its underlying buffer causing the "Synchronize Terms" action
to fail (trying to read on a closed buffer).
Fixes#19911
Now that we're closer to switching to P3 for good, these helpers have
outlived their usefulness, and mostly add noise.
All remaining dict.iter*() or dict.view*() must be converted to the
normal keys(), values() or items() calls.
Whenever the result is likely to be used for more than the scope of a
loop, or when the dict needs to be modified during iteration, the calls
must be wrapped in a ``list()``, to protect the new P3 semantics.
Those cases are very exceptional.
Also removed some dead code or improved the API to remove unnecessary
conversions.
* remove references to basestring & unicode (use relevant pycompat
helpers)
* remove some str calls (either entirely or replaced by relevant
helper, either text or native)
* use better API to avoid unnecessary conversions
* remove some XML declarations in views
* StringIO removed from stdlib, replace with io
* try to correctly handle BytesIO/StringIO (one is for bytes the other
is for text)
* fix base64: Python 3 removed bytes-encoding and bytes-bytes
codecs (via #encode) so replace all calls to str.encode('base64'),
also b64encode is a bytes->bytes conversion so attempt to properly
handle that
issue #8530
In Python 2, to raise a new exception but reuse a traceback requires a
special form of ``raise`` (``raise etype, evalue, tb``).
In Python 3, this is now done via a ``with_traceback`` method on
exception objects.
However this requires a bit of trickery as the former is invalid
syntax in Python 3, hence pycompat bridge created via an exec for
Python 2.
In Python 3:
* various builtins and dict methods were changed to return
view/iterable objects rather than lists
* and the separate Python 2 view/iterable builtins and methods were
removed altogether
This is problematic when using these items as list (which the happens
repeatedly in Odoo), but more viciously when iterating *multiple times*
over them (which also happens, which I've messed up multiple times while
writing this, and which is a pain to debug even when you've just created
the issue).
Convert all code using these to semantics-matching cross-version
helper functions to get the LCD behaviour between P2 and P3, and
forbid the builtins via lint.
issue #8530
Adrian Torres