20
20
The methods here allow for api symbol versioning.
23
__all__ = ['warn', 'set_warning_method', 'zero_seven']
23
__all__ = ['deprecated_function',
26
'DEPRECATED_PARAMETER',
28
'warn', 'set_warning_method', 'zero_seven',
25
35
from warnings import warn
38
DEPRECATED_PARAMETER = "A deprecated parameter marker."
28
39
zero_seven = "%s was deprecated in version 0.7."
40
zero_eight = "%s was deprecated in version 0.8."
41
zero_nine = "%s was deprecated in version 0.9."
42
zero_ten = "%s was deprecated in version 0.10."
43
zero_eleven = "%s was deprecated in version 0.11."
31
46
def set_warning_method(method):
53
68
symbol = "%s.%s" % (callable.__module__,
56
warn(deprecation_version % symbol, DeprecationWarning)
71
warn(deprecation_version % symbol, DeprecationWarning, stacklevel=2)
57
72
return callable(*args, **kwargs)
58
73
_populate_decorated(callable, deprecation_version, "function",
59
74
decorated_function)
76
91
self.__class__.__name__,
79
warn(deprecation_version % symbol, DeprecationWarning)
94
warn(deprecation_version % symbol, DeprecationWarning, stacklevel=2)
80
95
return callable(self, *args, **kwargs)
81
96
_populate_decorated(callable, deprecation_version, "method",
84
99
return method_decorator
102
def deprecated_passed(parameter_value):
103
"""Return True if parameter_value was used."""
104
# FIXME: it might be nice to have a parameter deprecation decorator.
105
# it would need to handle positional and *args and **kwargs parameters,
106
# which means some mechanism to describe how the parameter was being
107
# passed before deprecation, and some way to deprecate parameters that
108
# were not at the end of the arg list. Thats needed for __init__ where
109
# we cannot just forward to a new method name.I.e. in the following
110
# examples we would want to have callers that pass any value to 'bad' be
111
# given a warning - because we have applied:
112
# @deprecated_parameter('bad', zero_seven)
114
# def __init__(self, bad=None)
115
# def __init__(self, bad, other)
116
# def __init__(self, **kwargs)
118
return not parameter_value is DEPRECATED_PARAMETER
87
121
def _decorate_docstring(callable, deprecation_version, label,
88
122
decorated_callable):
89
docstring_lines = callable.__doc__.split('\n')
124
docstring_lines = callable.__doc__.split('\n')
90
127
if len(docstring_lines) == 0:
91
128
decorated_callable.__doc__ = deprecation_version % ("This " + label)
92
129
elif len(docstring_lines) == 1:
112
149
decorated_callable)
113
150
decorated_callable.__module__ = callable.__module__
114
151
decorated_callable.__name__ = callable.__name__
152
decorated_callable.is_deprecated = True
155
def deprecated_list(deprecation_version, variable_name,
156
initial_value, extra=None):
157
"""Create a list that warns when modified
159
:param deprecation_version: something like zero_nine
160
:param initial_value: The contents of the list
161
:param variable_name: This allows better warnings to be printed
162
:param extra: Extra info to print when printing a warning
165
subst_text = 'Modifying %s' % (variable_name,)
166
msg = deprecation_version % (subst_text,)
170
class _DeprecatedList(list):
171
__doc__ = list.__doc__ + msg
175
def _warn_deprecated(self, func, *args, **kwargs):
176
warn(msg, DeprecationWarning, stacklevel=3)
177
return func(self, *args, **kwargs)
179
def append(self, obj):
180
"""appending to %s is deprecated""" % (variable_name,)
181
return self._warn_deprecated(list.append, obj)
183
def insert(self, index, obj):
184
"""inserting to %s is deprecated""" % (variable_name,)
185
return self._warn_deprecated(list.insert, index, obj)
187
def extend(self, iterable):
188
"""extending %s is deprecated""" % (variable_name,)
189
return self._warn_deprecated(list.extend, iterable)
191
def remove(self, value):
192
"""removing from %s is deprecated""" % (variable_name,)
193
return self._warn_deprecated(list.remove, value)
195
def pop(self, index=None):
196
"""pop'ing from from %s is deprecated""" % (variable_name,)
198
return self._warn_deprecated(list.pop, index)
201
return self._warn_deprecated(list.pop)
203
return _DeprecatedList(initial_value)