Module « numpy »

Classe « errstate »

Informations générales

Héritage

builtins.object
    ContextDecorator
        errstate

Définition

class errstate(ContextDecorator):

Description _{[extrait de errstate.__doc__]}

    errstate(**kwargs)

    Context manager for floating-point error handling.

    Using an instance of `errstate` as a context manager allows statements in
    that context to execute with a known error handling behavior. Upon entering
    the context the error handling is set with `seterr` and `seterrcall`, and
    upon exiting it is reset to what it was before.

    ..  versionchanged:: 1.17.0
        `errstate` is also usable as a function decorator, saving
        a level of indentation if an entire function is wrapped.
        See :py:class:`contextlib.ContextDecorator` for more information.

    Parameters
    ----------
    kwargs : {divide, over, under, invalid}
        Keyword arguments. The valid keywords are the possible floating-point
        exceptions. Each keyword should have a string value that defines the
        treatment for the particular error. Possible values are
        {'ignore', 'warn', 'raise', 'call', 'print', 'log'}.

    See Also
    --------
    seterr, geterr, seterrcall, geterrcall

    Notes
    -----
    For complete documentation of the types of floating-point exceptions and
    treatment options, see `seterr`.

    Examples
    --------
    >>> from collections import OrderedDict
    >>> olderr = np.seterr(all='ignore')  # Set error handling to known state.

    >>> np.arange(3) / 0.
    array([nan, inf, inf])
    >>> with np.errstate(divide='warn'):
    ...     np.arange(3) / 0.
    array([nan, inf, inf])

    >>> np.sqrt(-1)
    nan
    >>> with np.errstate(invalid='raise'):
    ...     np.sqrt(-1)
    Traceback (most recent call last):
      File "<stdin>", line 2, in <module>
    FloatingPointError: invalid value encountered in sqrt

    Outside the context the error handling behavior has not changed:

    >>> OrderedDict(sorted(np.geterr().items()))
    OrderedDict([('divide', 'ignore'), ('invalid', 'ignore'), ('over', 'ignore'), ('under', 'ignore')])

    

Constructeur(s)

Signature du constructeur	Description
__init__(self, *, call=<numpy.core._ufunc_config._unspecified object at 0x7f50772221c0>, **kwargs)

Liste des opérateurs

Opérateurs hérités de la classe object

__eq__, __ge__, __gt__, __le__, __lt__, __ne__

Méthodes héritées de la classe ContextDecorator

__call__, __init_subclass__, __subclasshook__

Méthodes héritées de la classe object

__delattr__, __dir__, __format__, __getattribute__, __hash__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__