exists#

ivy.exists(x, /)[source]#

Check as to whether the input is None or not.

Parameters:: x (Any) – Input to check.
Return type:: bool
Returns:: ret – True if x is not None, else False.

Examples

With Any input:

>>> x = None
>>> y = ivy.exists(x)
>>> print(y)
False

>>> x = ""
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = []
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = 1
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = "abc"
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = [1, 0, -1, 1]
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = ivy.array([1, 2, 3, 1.2])
>>> y = ivy.exists(x)
>>> print(y)
True

With a mix of ivy.Container and Any input:

>>> x = ivy.Container(a=None, b=None)
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = ivy.Container(a=None, b="")
>>> y = ivy.exists(x)
>>> print(y)
True

>>> x = ivy.Container(a=123, b="")
>>> y = ivy.exists(x)
>>> print(y)
True

Array.exists(self, /)[source]#

ivy.Array instance method variant of ivy.exists. This method simply wraps the function, and so the docstring for ivy.exists also applies to this method with minimal changes.

Parameters:: self (Array) – input array.
Return type:: bool
Returns:: ret – True if input is not None, else False.

Examples

>>> x = ivy.array([1, 2, 3, 1.2])
>>> y = x.exists()
>>> print(y)
True

>>> x = ivy.array([])
>>> y = x.exists()
>>> print(y)
True

Container.exists(self, /, *, key_chains=None, to_apply=True, prune_unapplied=False, map_sequences=False)[source]#

ivy.Container instance method variant of ivy.exists. This method simply wraps the function, and so the docstring for ivy.exists also applies to this method with minimal changes.

Parameters:

self (Container) – The input container.
key_chains (Optional[Union[List[str], Dict[str, str], Container]], default: None) – The key-chains to apply or not apply the method to. Default is None.
to_apply (Union[bool, Container], default: True) – If True, the method will be applied to key_chains, otherwise key_chains will be skipped. Default is True.
prune_unapplied (Union[bool, Container], default: False) – Whether to prune key_chains for which the function was not applied. Default is False.
map_sequences (Union[bool, Container], default: False) – Whether to also map method to sequences (lists, tuples). Default is False.

Return type:

Container

Returns:

ret – A boolean container detaling if any of the leaf nodes are None. True if not None, False if None.

Examples

>>> x = ivy.Container(a=[1,2,3,4], b=[])
>>> y = x.exists()
>>> print(y)
{ a: True, b: True }

>>> x = ivy.Container(a=None, b=[1,2])
>>> y = x.exists()
>>> print(y)
{ a: False, b: True }

>>> x = ivy.Container(a={"d": 1, "c": 3}, b=None)
>>> y = x.exists()
>>> print(y)
{ a: { c: True, d: True }, b: False }