deprecated

Module to help with deprecating objects and classes

FutureWarningMixin(*args, **kwargs)	Insert FutureWarning for object creation
ModuleProxy(module_name)	Proxy for module that may not yet have been imported
VisibleDeprecationWarning	Deprecation warning that will be shown by default
alert_future_error(msg, version, *[, ...])	Warn or error with appropriate messages for changing functionality.

FutureWarningMixin

class nibabel.deprecated.FutureWarningMixin(*args, **kwargs)

Bases: object

Insert FutureWarning for object creation

Examples

>>> class C: pass
>>> class D(FutureWarningMixin, C):
...     warn_message = "Please, don't use this class"

Record the warning

>>> with warnings.catch_warnings(record=True) as warns:
...     d = D()
...     warns[0].message.args[0]
"Please, don't use this class"

__init__(*args, **kwargs)

warn_message = 'This class will be removed in future versions'

ModuleProxy

class nibabel.deprecated.ModuleProxy(module_name)

Bases: object

Proxy for module that may not yet have been imported

Parameters:

module_namestr

Full module name e.g. nibabel.minc

Examples

::

arr = np.arange(24).reshape((2, 3, 4)) nifti1 = ModuleProxy(‘nibabel.nifti1’) nifti1_image = nifti1.Nifti1Image(arr, np.eye(4))

So, the nifti1 object is a proxy that will import the required module when you do attribute access and return the attributes of the imported module.

__init__(module_name)

VisibleDeprecationWarning

class nibabel.deprecated.VisibleDeprecationWarning

Bases: UserWarning

Deprecation warning that will be shown by default

Python >= 2.7 does not show standard DeprecationWarnings by default:

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

Use this class for cases where we do want to show deprecations by default.

__init__(*args, **kwargs)

alert_future_error

nibabel.deprecated.alert_future_error(msg: str, version: str, *, warning_class: ~typing.Type[Warning] = <class 'FutureWarning'>, error_class: ~typing.Type[Exception] = <class 'RuntimeError'>, warning_rec: str = '', error_rec: str = '', stacklevel: int = 2)

Warn or error with appropriate messages for changing functionality.

Parameters:

msgstr

Description of the condition that led to the alert

versionstr

NiBabel version at which the warning will become an error

warning_classsubclass of Warning, optional

Warning class to emit before version

error_classsubclass of Exception, optional

Error class to emit after version

warning_recstr, optional

Guidance for suppressing the warning and avoiding the future error

error_rec: str, optional

Guidance for resolving the error

stacklevel: int, optional

Warnings stacklevel to provide; note that this will be incremented by 1, so provide the stacklevel you would provide directly to warnings.warn()