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from __future__ import absolute_import |
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2
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3
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import atexit |
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4
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import inspect |
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5
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import os |
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from functools import partial |
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7
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8
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from .actions import Action |
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from .actions import CodePrinter |
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from .actions import Debugger |
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from .actions import VarsPrinter |
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try: |
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if os.environ.get("PUREPYTHONHUNTER"): |
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raise ImportError("Skipped") |
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from ._predicates import And as _And |
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from ._predicates import Or as _Or |
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from ._predicates import When |
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from ._predicates import Query |
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from ._tracer import Tracer |
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except ImportError: |
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from .predicates import And as _And |
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from .predicates import Or as _Or |
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from .predicates import When |
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from .predicates import Query |
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from .tracer import Tracer |
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__version__ = "0.6.0" |
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__all__ = 'Q', 'When', 'And', 'Or', 'CodePrinter', 'Debugger', 'VarsPrinter', 'trace', 'stop' |
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def Q(*predicates, **query): |
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""" |
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35
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Handles situations where :class:`hunter.Query` objects (or other callables) are passed in as positional arguments. |
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Conveniently converts that to an :class:`hunter.Or` predicate. |
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""" |
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optional_actions = query.pop("actions", []) |
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if "action" in query: |
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optional_actions.append(query.pop("action")) |
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if predicates: |
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predicates = tuple( |
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p() if inspect.isclass(p) and issubclass(p, Action) else p |
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for p in predicates |
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) |
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if any(isinstance(p, CodePrinter) for p in predicates): |
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if CodePrinter in optional_actions: |
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optional_actions.remove(CodePrinter) |
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if query: |
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predicates += Query(**query), |
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result = Or(*predicates) |
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else: |
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result = Query(**query) |
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if optional_actions: |
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result = When(result, *optional_actions) |
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return result |
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62
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63
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def _flatten(predicate, *predicates, **kwargs): |
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cls = kwargs.pop('cls') |
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if kwargs: |
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raise TypeError("Did not expecte keyword arguments") |
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if not predicates: |
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return predicate |
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else: |
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all_predicates = [] |
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if isinstance(predicate, cls): |
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all_predicates.extend(predicate.predicates) |
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else: |
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all_predicates.append(predicate) |
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for p in predicates: |
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if isinstance(p, cls): |
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all_predicates.extend(p.predicates) |
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else: |
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all_predicates.append(p) |
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return cls(*all_predicates) |
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84
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85
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And = partial(_flatten, cls=_And) |
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Or = partial(_flatten, cls=_Or) |
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87
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88
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_tracer = Tracer() |
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stop = atexit.register(_tracer.stop) |
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90
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91
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92
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def trace(*predicates, **options): |
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if "action" not in options and "actions" not in options: |
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options["action"] = CodePrinter |
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96
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clear_env_var = options.pop("clear_env_var", False) |
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predicate = Q(*predicates, **options) |
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98
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99
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if clear_env_var: |
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os.environ.pop("PYTHONHUNTER", None) |
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101
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102
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return _tracer.trace(predicate) |
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103
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ionelmc /
python-hunter
