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This commit replaces calls to pycompat helpers that were intended for
python 2 <-> python 3 interoperability for python 3 builtins, as python
2 is no longer officially supported by Odoo.
This includes:
* calls to imap/izip/ifilter replaced by map/zip/filter
* uses of text_type replaced by str
* uses of unichr replaced by chr
* calls to implements_to_string, implements_iterator removed
* string_types and integer_types replaced by str, int respectively
* calls to to_native replaced by calls to to_text
This is done in preparation to the removal of these deprecated helpers
in the following commit.
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In Python 3, SETUP_FINALLY is used if the exception object is bound in
the except block — even if there is no finally block — in order to
unbind and cleanup the exception's binding as part of PEP 3110:
https://www.python.org/dev/peps/pep-3110/#semantic-changes
This allows both using exception objects in Python 3 and using
finally blocks in both version.
opw 1824211
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Python 3.7 introduced two new opcodes LOAD_METHOD and CALL_METHOD.
https://docs.python.org/3/whatsnew/3.7.html#cpython-bytecode-changes
https://bugs.python.org/issue26110
Basic QWeb rendering was failing on operations like
request.csrf_token()
ValueError: forbidden opcode(s) in 'request.csrf_token()': LOAD_METHOD, CALL_METHOD
Closes #25783
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Following the 3.6 wordcode change, EXTENDED_ARGS gets used for jumps
offset by more than 256 bytes (128 opcodes), most commonly
absolute (so many script of more than 128 opcodes with conditionals
arer going to trigger the issue).
In bytecoded Python versions, EXTENDED_ARGS was only necessary above
65k opcodes: the opcode would get a separate 16-bits argument, while
wordcode opcodes get 8-bit intrinsic.
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* 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
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* Python 3.4 adds new convenient bytecode-inspection API to dis which
is nice, however Python 3.6 also switches from the old bytecode to a
new wordcode which breaks _get_opcodes and *requires* that we use
the new API
* add various opcodes which either were added in Python
3 (CALL_FUNCTION_EX) or were only used for some small corners of
Python 2 but have been expanded or despecialised in Python
3 (BUILD_SLICE)
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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.
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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
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* Reverse wrapper courtesy of @rco-odoo's original P3 branch
* thin compat module stripped down from werkzeug (to augment as needed)
issue 8530
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Futurize fixers:
* lib2to3.fixes.fix_except
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