Commit Graph

33 Commits

Author SHA1 Message Date
Damien George
3c4bfd1dec py/objexcept: Support errno attribute on OSError exceptions.
This commit adds the errno attribute to exceptions, so code can retrieve
errno codes from an OSError using exc.errno.

The implementation here simply lets `errno` (and the existing `value`)
attributes work on any exception instance (they both alias args[0]).  This
is for efficiency and to keep code size down.  The pros and cons of this
are:

Pros:
- more compatible with CPython, less difference to document and learn
- OSError().errno will correctly return None, whereas the current way of
  doing it via OSError().args[0] will raise an IndexError
- it reduces code size on most bare-metal ports (because they already have
  the errno qstr)
- for Python code that uses exc.errno the generated bytecode is 2 bytes
  smaller and more efficient to execute (compared with exc.args[0]); so
  bytecode loaded to RAM saves 2 bytes RAM for each use of this attribute,
  and bytecode that is frozen saves 2 bytes flash/ROM for each use
- it's easier/shorter to type, and saves 2 bytes of space in .py files that
  use it (for each use)

Cons:
- increases code size by 4-8 bytes on minimal ports that don't already have
  the `errno` qstr
- all exceptions now have .errno and .value attributes (a cpydiff test is
  added to address this)

See also #2407.

Signed-off-by: Damien George <damien@micropython.org>
2021-04-23 22:03:46 +10:00
Damien George
a3c89cf907 tests/cpydiff: Add CPy diff test for assignment expression behaviour. 2020-06-16 22:06:47 +10:00
Jim Mussared
309c19d39b tests/cpydiff: Add cpydiff test for __all__ used in imported package. 2020-05-02 17:41:04 +10:00
David Lechner
3dc324d3f1 tests: Format all Python code with black, except tests in basics subdir.
This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.
2020-03-30 13:21:58 +11:00
Damien George
69b415f745 tests: Move CPy diff test to real test now that subclass equality works.
Testing for equality of subclassed strings now works, thanks to commit
3aab54bf43
2020-02-04 18:25:34 +11:00
David Lechner
74106757ac tests/cpydiff: Add os module environ differences. 2020-02-04 17:54:31 +11:00
Damien George
4d528bbaa8 tests/cpydiff: Add CPy diff-test for using dict.keys() as a set.
See issue #5493.
2020-01-06 23:26:00 +11:00
clach04
ffd11486d4 tests/cpydiff: Fix typo in types_bytes_keywords.py doc comments. 2019-10-21 23:25:09 +11:00
Paul Sokolovsky
8181ec04a4 tests/cpydiff: Add case for difference in behaviour of bytes.format(). 2018-09-26 15:31:10 +10:00
Damien George
2ada1124d4 tests/cpydiff: Remove types_int_tobytesfloat now that it doesn't fail.
Commit e269cabe3e added a check that the
first argument to the to_bytes() method is an integer, and now uPy
follows CPython behaviour and raises a TypeError for this test.

Note: CPython checks the argument types before checking the number of
arguments, but uPy does it the other way around, so they give different
exception messages for this test, but still the same type, a TypeError.
2018-05-08 17:05:32 +10:00
Damien George
74ab341d3a tests/cpydiff: Remove working cases from types_float_rounding. 2018-05-04 22:30:50 +10:00
Damien George
cd9d71edc8 tests/cpydiff: Remove types_str_decodeerror now that it succeeds.
Commit 68c28174d0 implemented checking for
valid utf-8 data.
2018-05-04 22:27:14 +10:00
Damien George
4b5111f8e1 tests/cpydiff: Remove core_function_unpacking now that it succeeds.
Commit 1e70fda69f fixes this difference.
2018-05-04 22:19:50 +10:00
Damien George
c926e72750 tests/cpydiff: Indent workaround code snippet so it formats correctly. 2018-03-15 15:49:38 +11:00
Damien George
e4e3f0d727 tests/cpydiff: Update subclassing Exception case and give work-around. 2017-12-12 17:13:39 +11:00
Paul Sokolovsky
3c483842db tests/cpydiff: Fix markup where "" (xref) was used instead of "`" (code). 2017-12-03 15:32:09 +02:00
Damien George
63f47104fe tests/cpydiff: Add difference-test for second arg of builtin next(). 2017-11-28 10:50:53 +11:00
Paul Sokolovsky
75163325ae tests/cpydiff: Add cases for locals() discrepancies.
MicroPython doesn't maintain local symbolic environment, so any feature
depending on it won't work as expected.
2017-09-16 13:05:15 +03:00
Paul Sokolovsky
ad3abcd324 tests/cpydiff: Add case for str.ljust/rjust. 2017-07-09 15:04:26 +03:00
Paul Sokolovsky
0c5369a1f0 tests/cpydiff/: Improve wording, add more workarounds. 2017-07-09 14:33:55 +03:00
Paul Sokolovsky
5f65ad8c96 tests/cpydiff/core_class_supermultiple: Same cause as core_class_mro. 2017-07-09 13:47:23 +03:00
Paul Sokolovsky
c5efb8159f tests/cpydiff/core_arguments: Move under Functions subsection.
This is the last "orphan" case.
2017-07-09 13:36:28 +03:00
Paul Sokolovsky
b2979023ac tests/cpydiff/core_class_mro: Move under Classes, add workaround. 2017-07-09 13:32:17 +03:00
Paul Sokolovsky
ed52955c6b tests/cpydiff/modules_deque: Elaborate workaround. 2017-07-05 23:03:37 +03:00
Damien George
084824f866 tests: Move super-as-local test from cpydiff to basic tests.
It's now possible to use the name "super" as a local variable.
2017-05-06 11:01:57 +10:00
Paul Sokolovsky
12ea06567c tests/cpydiff/core_function_unpacking: Fill in workaround. 2017-05-04 00:48:48 +03:00
Paul Sokolovsky
92657c671f tests/cpydiff/core_import_split_ns_pkgs: Test for split namespace packages. 2017-05-03 17:16:19 +03:00
Paul Sokolovsky
3923f96dc6 tests/cpydiff/core_import_path: Test showing difference in package.__path__. 2017-05-03 12:22:53 +03:00
Paul Sokolovsky
c1b19115e5 tests/cpydiff/core_import_prereg: Fill in cause and workaround. 2017-05-02 14:12:52 +03:00
Paul Sokolovsky
8bb84cc627 tests/cpydiff/core_function_userattr: Clarify, fill in cause and workaround. 2017-05-02 03:43:21 +03:00
Paul Sokolovsky
58ecbc7752 tests/cpydiff/core_arguments: Fill in cause/workaround. 2017-05-02 03:36:47 +03:00
Damien George
465a604547 tests/cpydiff: Add a test for storing iterable to a list slice. 2017-02-20 17:22:12 +11:00
Rami Ali
86c7507233 tests/cpydiff: Add initial set of tests for uPy-CPython differences.
These tests are intended to fail, as they provide a programatic record of
differences between uPy and CPython.  They also contain a special comment
at the start of the file which has meta-data describing the difference,
including known causes and known workarounds.
2017-02-20 16:50:34 +11:00