bpo-42282: Fold constants inside named expressions (GH-23190)
* The AST optimiser wasn't descending into named expressions, so any constant subexpressions weren't being folded at compile time * Remove "default:" clauses inside the AST optimiser code to reduce the risk of similar bugs passing unnoticed in future compiler changes
bpo-42260: PyConfig_Read() only parses argv once (GH-23168)
The PyConfig_Read() function now only parses PyConfig.argv arguments once: PyConfig.parse_argv is set to 2 after arguments are parsed. Since Python arguments are strippped from PyConfig.argv, parsing arguments twice would parse the application options as Python options. * Rework the PyConfig documentation. * Fix _testinternalcapi.set_config() error handling. * SetConfigTests no longer needs parse_argv=0 when restoring the old configuration.
bpo-42260: Add _PyConfig_FromDict() (GH-23167)
* Rename config_as_dict() to _PyConfig_AsDict(). * Add 'module_search_paths_set' to _PyConfig_AsDict(). * Add _PyConfig_FromDict(). * Add get_config() and set_config() to _testinternalcapi. * Add config_check_consistency().
bpo-41877 Check for asert, aseert, assrt in mocks (GH-23165)
Currently, a Mock object which is not unsafe will raise an AttributeError if an attribute with the prefix assert or assret is accessed on it. This protects against misspellings of real assert method calls, which lead to tests passing silently even if the tested code does not satisfy the intended assertion. Recently a check was done in a large code base (Google) and three more frequent ways of misspelling assert were found causing harm: asert, aseert, assrt. These are now added to the existing check.
bpo-42260: Add _PyInterpreterState_SetConfig() (GH-23158)
* Inline _PyInterpreterState_SetConfig(): replace it with _PyConfig_Copy(). * Add _PyErr_SetFromPyStatus() * Add _PyInterpreterState_GetConfigCopy() * Add a new _PyInterpreterState_SetConfig() function. * Add an unit which gets, modifies, and sets the config.
bpo-42260: Main init modify sys.flags in-place (GH-23150)
When Py_Initialize() is called twice, the second call now updates more sys attributes for the configuration, rather than only sys.argv. * Rename _PySys_InitMain() to _PySys_UpdateConfig(). * _PySys_UpdateConfig() now modifies sys.flags in-place, instead of creating a new flags object. * Remove old commented sys.flags flags (unbuffered and skip_first). * Add private _PySys_GetObject() function. * When Py_Initialize(), Py_InitializeFromConfig() and
bpo-42260: Reorganize PyConfig (GH-23149)
* Move orig_argv before argv * Move program_name and platlibdir with other path configuration inputs Give a name to the PyPreConfig and PyConfig structures and separate the type definitions.
bpo-41796: Call _PyAST_Fini() earlier to fix a leak (GH-23131)
Call _PyAST_Fini() on all interpreters, not only on the main interpreter. Also, call it ealier to fix a reference leak. Python types contain a reference to themselves in in their PyTypeObject.tp_mro member. _PyAST_Fini() must called before the last GC collection to destroy AST types. _PyInterpreterState_Clear() now calls _PyAST_Fini(). It now also calls _PyWarnings_Fini() on subinterpeters, not only on the main interpreter. Add an assertion in AST init_types() to ensure that the _ast module is no longer used after _PyAST_Fini() has been called.