deprecate() - Code Metrics - Inspection of "MNT: Deprecate get_upper_air_data" - Unidata/MetPy - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#519)

unknown

created 2017-07-19 22:03 UTC

deprecate() D

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Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	10
c	1
b	0
f	0
dl	0
loc	59
rs	4.8648

1 Method

Rating	Name	Duplication	Size	Complexity
A	finalize()	0	9	1

How to fix Long Method Complexity

import warnings
import functools


class MetpyDeprecationWarning(UserWarning):
    """
    A class for issuing deprecation warnings for MetPy users.

    In light of the fact that Python builtin DeprecationWarnings are ignored
    by default as of Python 2.7 (see link below), this class was put in to
    allow for the signaling of deprecation, but via UserWarnings which are not
    ignored by default. Borrowed with love from matplotlib.

    https://docs.python.org/dev/whatsnew/2.7.html#the-future-for-python-2-x
    """
    pass


metpyDeprecation = MetpyDeprecationWarning


def _generate_deprecation_message(since, message='', name='',
                                  alternative='', pending=False,
                                  obj_type='attribute',
                                  addendum=''):

    if not message:

        if pending:
            message = (
                'The %(name)s %(obj_type)s will be deprecated in a '
                'future version.')
        else:
            message = (
                'The %(name)s %(obj_type)s was deprecated in version '
                '%(since)s.')

    altmessage = ''
    if alternative:
        altmessage = ' Use %s instead.' % alternative

    message = ((message % {
        'func': name,
        'name': name,
        'alternative': alternative,
        'obj_type': obj_type,
        'since': since}) +
        altmessage)

    if addendum:
        message += addendum

    return message


def warn_deprecated(
        since, message='', name='', alternative='', pending=False,
        obj_type='attribute', addendum=''):
    """
    Used to display deprecation warning in a standard way.

    Parameters
    ----------
    since : str
        The release at which this API became deprecated.

    message : str, optional
        Override the default deprecation message.  The format
        specifier `%(name)s` may be used for the name of the function,
        and `%(alternative)s` may be used in the deprecation message
        to insert the name of an alternative to the deprecated
        function.  `%(obj_type)s` may be used to insert a friendly name
        for the type of object being deprecated.

    name : str, optional
        The name of the deprecated object.

    alternative : str, optional
        An alternative function that the user may use in place of the
        deprecated function.  The deprecation warning will tell the user
        about this alternative if provided.

    pending : bool, optional
        If True, uses a PendingDeprecationWarning instead of a
        DeprecationWarning.

    obj_type : str, optional
        The object type being deprecated.

    addendum : str, optional
        Additional text appended directly to the final message.

    Examples
    --------

        Basic example::

            # To warn of the deprecation of "metpy.name_of_module"
            warn_deprecated('0.6.0', name='metpy.name_of_module',
                            obj_type='module')

    """
    message = _generate_deprecation_message(
                since, message, name, alternative, pending, obj_type)

    warnings.warn(message, metpyDeprecation, stacklevel=1)


def deprecated(since, message='', name='', alternative='', pending=False,
               obj_type=None, addendum=''):
    """
    Decorator to mark a function or a class as deprecated.

    Parameters
    ----------
    since : str
        The release at which this API became deprecated.  This is
        required.

    message : str, optional
        Override the default deprecation message.  The format
        specifier `%(name)s` may be used for the name of the object,
        and `%(alternative)s` may be used in the deprecation message
        to insert the name of an alternative to the deprecated
        object.  `%(obj_type)s` may be used to insert a friendly name
        for the type of object being deprecated.

    name : str, optional
        The name of the deprecated object; if not provided the name
        is automatically determined from the passed in object,
        though this is useful in the case of renamed functions, where
        the new function is just assigned to the name of the
        deprecated function.  For example::

            def new_function():
                ...
            oldFunction = new_function

    alternative : str, optional
        An alternative object that the user may use in place of the
        deprecated object.  The deprecation warning will tell the user
        about this alternative if provided.

    pending : bool, optional
        If True, uses a PendingDeprecationWarning instead of a
        DeprecationWarning.

    addendum : str, optional
        Additional text appended directly to the final message.

    Examples
    --------

        Basic example::

            @deprecated('1.4.0')
            def the_function_to_deprecate():
                pass

    """

    def deprecate(obj, message=message, name=name, alternative=alternative,
                  pending=pending, addendum=addendum):
        import textwrap

        if not name:
            name = obj.__name__

        if isinstance(obj, type):
            obj_type = "class"
            old_doc = obj.__doc__
            func = obj.__init__

            def finalize(wrapper, new_doc):
                try:
                    obj.__doc__ = new_doc
                except (AttributeError, TypeError):
                    # cls.__doc__ is not writeable on Py2.
                    # TypeError occurs on PyPy
                    pass
                obj.__init__ = wrapper
                return obj
        else:
            obj_type = "function"
            if isinstance(obj, classmethod):
                func = obj.__func__
                old_doc = func.__doc__

                def finalize(wrapper, new_doc):
                    wrapper = functools.wraps(func)(wrapper)
                    wrapper.__doc__ = new_doc
                    return classmethod(wrapper)
            else:
                func = obj
                old_doc = func.__doc__

                def finalize(wrapper, new_doc):
                    wrapper = functools.wraps(func)(wrapper)
                    wrapper.__doc__ = new_doc
                    return wrapper

        message = _generate_deprecation_message(
                    since, message, name, alternative, pending,
                    obj_type, addendum)

        def wrapper(*args, **kwargs):
            warnings.warn(message, metpyDeprecation, stacklevel=2)
            return func(*args, **kwargs)

        old_doc = textwrap.dedent(old_doc or '').strip('\n')
        message = message.strip()
        new_doc = (('\n.. deprecated:: %(since)s'
                    '\n    %(message)s\n\n' %
                    {'since': since, 'message': message}) + old_doc)
        if not old_doc:
            # This is to prevent a spurious 'unexected unindent' warning from
            # docutils when the original docstring was blank.
            new_doc += r'\ '

        return finalize(wrapper, new_doc)

    return deprecate


1			import warnings
2			import functools
3
4
5			class MetpyDeprecationWarning(UserWarning):
6			"""
7			A class for issuing deprecation warnings for MetPy users.
8
9			In light of the fact that Python builtin DeprecationWarnings are ignored
10			by default as of Python 2.7 (see link below), this class was put in to
11			allow for the signaling of deprecation, but via UserWarnings which are not
12			ignored by default. Borrowed with love from matplotlib.
13
14			https://docs.python.org/dev/whatsnew/2.7.html#the-future-for-python-2-x
15			"""
16			pass
17
18
19			metpyDeprecation = MetpyDeprecationWarning
20
21
22			def _generate_deprecation_message(since, message='', name='',
23			alternative='', pending=False,
24			obj_type='attribute',
25			addendum=''):
26
27			if not message:
28
29			if pending:
30			message = (
31			'The %(name)s %(obj_type)s will be deprecated in a '
32			'future version.')
33			else:
34			message = (
35			'The %(name)s %(obj_type)s was deprecated in version '
36			'%(since)s.')
37
38			altmessage = ''
39			if alternative:
40			altmessage = ' Use %s instead.' % alternative
41
42			message = ((message % {
43			'func': name,
44			'name': name,
45			'alternative': alternative,
46			'obj_type': obj_type,
47			'since': since}) +
48			altmessage)
49
50			if addendum:
51			message += addendum
52
53			return message
54
55
56			def warn_deprecated(
57			since, message='', name='', alternative='', pending=False,
58			obj_type='attribute', addendum=''):
59			"""
60			Used to display deprecation warning in a standard way.
61
62			Parameters
63			----------
64			since : str
65			The release at which this API became deprecated.
66
67			message : str, optional
68			Override the default deprecation message. The format
69			specifier `%(name)s` may be used for the name of the function,
70			and `%(alternative)s` may be used in the deprecation message
71			to insert the name of an alternative to the deprecated
72			function. `%(obj_type)s` may be used to insert a friendly name
73			for the type of object being deprecated.
74
75			name : str, optional
76			The name of the deprecated object.
77
78			alternative : str, optional
79			An alternative function that the user may use in place of the
80			deprecated function. The deprecation warning will tell the user
81			about this alternative if provided.
82
83			pending : bool, optional
84			If True, uses a PendingDeprecationWarning instead of a
85			DeprecationWarning.
86
87			obj_type : str, optional
88			The object type being deprecated.
89
90			addendum : str, optional
91			Additional text appended directly to the final message.
92
93			Examples
94			--------
95
96			Basic example::
97
98			# To warn of the deprecation of "metpy.name_of_module"
99			warn_deprecated('0.6.0', name='metpy.name_of_module',
100			obj_type='module')
101
102			"""
103			message = _generate_deprecation_message(
104			since, message, name, alternative, pending, obj_type)
105
106			warnings.warn(message, metpyDeprecation, stacklevel=1)
107
108
109			def deprecated(since, message='', name='', alternative='', pending=False,
110			obj_type=None, addendum=''):
111			"""
112			Decorator to mark a function or a class as deprecated.
113
114			Parameters
115			----------
116			since : str
117			The release at which this API became deprecated. This is
118			required.
119
120			message : str, optional
121			Override the default deprecation message. The format
122			specifier `%(name)s` may be used for the name of the object,
123			and `%(alternative)s` may be used in the deprecation message
124			to insert the name of an alternative to the deprecated
125			object. `%(obj_type)s` may be used to insert a friendly name
126			for the type of object being deprecated.
127
128			name : str, optional
129			The name of the deprecated object; if not provided the name
130			is automatically determined from the passed in object,
131			though this is useful in the case of renamed functions, where
132			the new function is just assigned to the name of the
133			deprecated function. For example::
134
135			def new_function():
136			...
137			oldFunction = new_function
138
139			alternative : str, optional
140			An alternative object that the user may use in place of the
141			deprecated object. The deprecation warning will tell the user
142			about this alternative if provided.
143
144			pending : bool, optional
145			If True, uses a PendingDeprecationWarning instead of a
146			DeprecationWarning.
147
148			addendum : str, optional
149			Additional text appended directly to the final message.
150
151			Examples
152			--------
153
154			Basic example::
155
156			@deprecated('1.4.0')
157			def the_function_to_deprecate():
158			pass
159
160			"""
161
162			def deprecate(obj, message=message, name=name, alternative=alternative,
163			pending=pending, addendum=addendum):
164			import textwrap
165
166			if not name:
167			name = obj.__name__
168
169			if isinstance(obj, type):
170			obj_type = "class"
171			old_doc = obj.__doc__
172			func = obj.__init__
173
174			def finalize(wrapper, new_doc):
175			try:
176			obj.__doc__ = new_doc
177			except (AttributeError, TypeError):
178			# cls.__doc__ is not writeable on Py2.
179			# TypeError occurs on PyPy
180			pass
181			obj.__init__ = wrapper
182			return obj
183			else:
184			obj_type = "function"
185			if isinstance(obj, classmethod):
186			func = obj.__func__
187			old_doc = func.__doc__
188
189			def finalize(wrapper, new_doc):
190			wrapper = functools.wraps(func)(wrapper)
191			wrapper.__doc__ = new_doc
192			return classmethod(wrapper)
193			else:
194			func = obj
195			old_doc = func.__doc__
196
197			def finalize(wrapper, new_doc):
198			wrapper = functools.wraps(func)(wrapper)
199			wrapper.__doc__ = new_doc
200			return wrapper
201
202			message = _generate_deprecation_message(
203			since, message, name, alternative, pending,
204			obj_type, addendum)
205
206			def wrapper(args, *kwargs):
207			warnings.warn(message, metpyDeprecation, stacklevel=2)
208			return func(args, *kwargs)
209
210			old_doc = textwrap.dedent(old_doc or '').strip('\n')
211			message = message.strip()
212			new_doc = (('\n.. deprecated:: %(since)s'
213			'\n %(message)s\n\n' %
214			{'since': since, 'message': message}) + old_doc)
215			if not old_doc:
216			# This is to prevent a spurious 'unexected unindent' warning from
217			# docutils when the original docstring was blank.
218			new_doc += r'\ '
219
220			return finalize(wrapper, new_doc)
221
222			return deprecate
223

Unidata / MetPy

Pull Request — master (#519)

deprecate() D

Complexity

Size

Duplication

Importance

1 Method

How to fix Long Method Complexity

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