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"""Various small utilities that might be useful everywhere""" |
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3
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from functools import wraps |
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from itertools import chain |
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import numpy as np |
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6
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import logging |
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8
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log = logging.getLogger() |
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11
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12
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def deprecated(obj): |
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"""Mark called object deprecated.""" |
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@wraps(obj) |
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def wrapper(*args, **kwargs): |
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name = '{}.{}'.format(obj.__self__.__class__, obj.__name__) if hasattr(obj, '__self__') else obj |
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log.warning('Call to deprecated {}'.format(name)) |
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return obj(*args, **kwargs) |
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return wrapper |
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def flatten(lst): |
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"""Flatten iterable a single level.""" |
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return chain.from_iterable(lst) |
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def scale(values, min=0, max=1): |
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"""Return values scaled to [min, max]""" |
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ptp = np.nanmax(values) - np.nanmin(values) |
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if ptp == 0: |
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return np.clip(values, min, max) |
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return (-np.nanmin(values) + values) / ptp * (max - min) + min |
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def abstract(obj): |
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"""Designate decorated class or method abstract.""" |
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if isinstance(obj, type): |
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old__new__ = obj.__new__ |
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def _refuse__new__(cls, *args, **kwargs): |
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if cls == obj: |
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raise NotImplementedError("Can't instantiate abstract class " + obj.__name__) |
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return old__new__(cls, *args, **kwargs) |
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obj.__new__ = _refuse__new__ |
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return obj |
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else: |
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if not hasattr(obj, '__qualname__'): |
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raise TypeError('Put @abstract decorator below (evaluated before) ' |
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'any of @staticmethod, @classmethod, or @property.') |
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cls_name = obj.__qualname__.rsplit('.', 1)[0] |
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def _refuse__call__(*args, **kwargs): |
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raise NotImplementedError("Can't call abstract method {} of class {}" |
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.format(obj.__name__, cls_name)) |
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return _refuse__call__ |
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58
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def export_globals(globals, module_name): |
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""" |
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Return list of important for export globals (callables, constants) from |
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`globals` dict, defined in module `module_name`. |
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Usage |
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----- |
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In some module, on the second-to-last line: |
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__all__ = export_globals(globals(), __name__) |
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""" |
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return [getattr(v, '__name__', k) |
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for k, v in globals.items() # export |
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if ((callable(v) and v.__module__ == module_name # callables from this module |
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or k.isupper()) and # or CONSTANTS |
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not getattr(v, '__name__', k).startswith('_'))] # neither marked internal |
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76
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# For best result, keep this at the bottom |
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__all__ = export_globals(globals(), __name__) |
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80
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# ONLY NON-EXPORTED VALUES BELOW HERE |
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hugobuddel /
orange3
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