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77 lines
2.3 KiB
77 lines
2.3 KiB
6 years ago
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import functools
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import inspect
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import reprlib
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import sys
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import traceback
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from . import constants
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def _get_function_source(func):
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func = inspect.unwrap(func)
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if inspect.isfunction(func):
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code = func.__code__
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return (code.co_filename, code.co_firstlineno)
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if isinstance(func, functools.partial):
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return _get_function_source(func.func)
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if isinstance(func, functools.partialmethod):
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return _get_function_source(func.func)
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return None
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def _format_callback_source(func, args):
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func_repr = _format_callback(func, args, None)
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source = _get_function_source(func)
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if source:
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func_repr += f' at {source[0]}:{source[1]}'
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return func_repr
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def _format_args_and_kwargs(args, kwargs):
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"""Format function arguments and keyword arguments.
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Special case for a single parameter: ('hello',) is formatted as ('hello').
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"""
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# use reprlib to limit the length of the output
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items = []
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if args:
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items.extend(reprlib.repr(arg) for arg in args)
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if kwargs:
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items.extend(f'{k}={reprlib.repr(v)}' for k, v in kwargs.items())
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return '({})'.format(', '.join(items))
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def _format_callback(func, args, kwargs, suffix=''):
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if isinstance(func, functools.partial):
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suffix = _format_args_and_kwargs(args, kwargs) + suffix
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return _format_callback(func.func, func.args, func.keywords, suffix)
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if hasattr(func, '__qualname__') and func.__qualname__:
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func_repr = func.__qualname__
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elif hasattr(func, '__name__') and func.__name__:
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func_repr = func.__name__
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else:
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func_repr = repr(func)
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func_repr += _format_args_and_kwargs(args, kwargs)
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if suffix:
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func_repr += suffix
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return func_repr
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def extract_stack(f=None, limit=None):
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"""Replacement for traceback.extract_stack() that only does the
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necessary work for asyncio debug mode.
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"""
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if f is None:
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f = sys._getframe().f_back
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if limit is None:
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# Limit the amount of work to a reasonable amount, as extract_stack()
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# can be called for each coroutine and future in debug mode.
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limit = constants.DEBUG_STACK_DEPTH
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stack = traceback.StackSummary.extract(traceback.walk_stack(f),
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limit=limit,
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lookup_lines=False)
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stack.reverse()
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return stack
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