mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-28 20:40:21 +08:00
Stefan van der Walt
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
import warnings
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import functools
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__all__ = ['deprecated', 'is_str']
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try:
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isinstance("", basestring)
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def is_str(s):
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"""Return True if `s` is a string. Safe for Python 2 and 3."""
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return isinstance(s, basestring)
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except NameError:
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def is_str(s):
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"""Return True if `s` is a string. Safe for Python 2 and 3."""
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return isinstance(s, str)
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class deprecated(object):
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"""Decorator to mark deprecated functions with warning.
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Adapted from <http://wiki.python.org/moin/PythonDecoratorLibrary>.
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Parameters
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----------
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alt_func : str
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If given, tell user what function to use instead.
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behavior : {'warn', 'raise'}
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Behavior during call to deprecated function: 'warn' = warn user that
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function is deprecated; 'raise' = raise error.
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"""
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def __init__(self, alt_func=None, behavior='warn'):
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self.alt_func = alt_func
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self.behavior = behavior
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def __call__(self, func):
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alt_msg = ''
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if self.alt_func is not None:
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alt_msg = ' Use ``%s`` instead.' % self.alt_func
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msg = 'Call to deprecated function ``%s``.' % func.__name__
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msg += alt_msg
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@functools.wraps(func)
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def wrapped(*args, **kwargs):
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if self.behavior == 'warn':
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warnings.warn_explicit(msg,
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category=DeprecationWarning,
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filename=func.func_code.co_filename,
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lineno=func.func_code.co_firstlineno + 1)
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elif self.behavior == 'raise':
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raise DeprecationWarning(msg)
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return func(*args, **kwargs)
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# modify doc string to display deprecation warning
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doc = '**Deprecated function**.' + alt_msg
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if wrapped.__doc__ is None:
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wrapped.__doc__ = doc
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else:
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wrapped.__doc__ = doc + '\n\n ' + wrapped.__doc__
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return wrapped
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