d687900f98
Make `warnings.catch_warnings()` use a context variable for holding the warning filtering state if the `sys.flags.context_aware_warnings` flag is set to true. This makes using the context manager thread-safe in multi-threaded programs. Add the `sys.flags.thread_inherit_context` flag. If true, starting a new thread with `threading.Thread` will use a copy of the context from the caller of `Thread.start()`. Both these flags are set to true by default for the free-threaded build and false for the default build. Move the Python implementation of warnings.py into _py_warnings.py. Make _contextvars a builtin module. Co-authored-by: Kumar Aditya <kumaraditya@python.org>
100 lines
1.9 KiB
Python
100 lines
1.9 KiB
Python
import sys
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__all__ = [
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"warn",
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"warn_explicit",
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"showwarning",
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"formatwarning",
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"filterwarnings",
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"simplefilter",
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"resetwarnings",
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"catch_warnings",
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"deprecated",
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]
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from _py_warnings import (
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WarningMessage,
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_DEPRECATED_MSG,
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_OptionError,
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_add_filter,
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_deprecated,
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_filters_mutated,
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_filters_mutated_lock_held,
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_filters_version,
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_formatwarning_orig,
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_formatwarnmsg,
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_formatwarnmsg_impl,
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_get_context,
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_get_filters,
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_getaction,
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_getcategory,
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_is_filename_to_skip,
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_is_internal_filename,
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_is_internal_frame,
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_lock,
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_new_context,
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_next_external_frame,
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_processoptions,
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_set_context,
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_set_module,
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_setoption,
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_setup_defaults,
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_showwarning_orig,
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_showwarnmsg,
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_showwarnmsg_impl,
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_use_context,
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_warn_unawaited_coroutine,
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_warnings_context,
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catch_warnings,
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defaultaction,
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deprecated,
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filters,
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filterwarnings,
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formatwarning,
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onceregistry,
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resetwarnings,
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showwarning,
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simplefilter,
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warn,
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warn_explicit,
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)
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try:
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# Try to use the C extension, this will replace some parts of the
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# _py_warnings implementation imported above.
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from _warnings import (
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_acquire_lock,
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_defaultaction as defaultaction,
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_filters_mutated_lock_held,
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_onceregistry as onceregistry,
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_release_lock,
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_warnings_context,
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filters,
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warn,
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warn_explicit,
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)
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_warnings_defaults = True
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class _Lock:
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def __enter__(self):
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_acquire_lock()
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return self
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def __exit__(self, *args):
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_release_lock()
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_lock = _Lock()
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except ImportError:
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_warnings_defaults = False
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# Module initialization
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_set_module(sys.modules[__name__])
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_processoptions(sys.warnoptions)
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if not _warnings_defaults:
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_setup_defaults()
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del _warnings_defaults
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del _setup_defaults
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