opt_einsum.contract.ContractExpression¶
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class
opt_einsum.contract.
ContractExpression
(contraction, contraction_list, constants_dict, **einsum_kwargs)[source]¶ Helper class for storing an explicit
contraction_list
which can then be repeatedly called solely with the array arguments.-
__init__
(contraction, contraction_list, constants_dict, **einsum_kwargs)[source]¶ Initialize self. See help(type(self)) for accurate signature.
Methods
__call__
(*arrays, **kwargs)Evaluate this expression with a set of arrays.
__delattr__
(name, /)Implement delattr(self, name).
__dir__
()Default dir() implementation.
__eq__
(value, /)Return self==value.
__format__
(format_spec, /)Default object formatter.
__ge__
(value, /)Return self>=value.
__getattribute__
(name, /)Return getattr(self, name).
__gt__
(value, /)Return self>value.
__hash__
()Return hash(self).
__init__
(contraction, contraction_list, …)Initialize self.
__init_subclass__
This method is called when a class is subclassed.
__le__
(value, /)Return self<=value.
__lt__
(value, /)Return self<value.
__ne__
(value, /)Return self!=value.
__new__
(**kwargs)Create and return a new object.
__reduce__
()Helper for pickle.
__reduce_ex__
(protocol, /)Helper for pickle.
__repr__
()Return repr(self).
__setattr__
(name, value, /)Implement setattr(self, name, value).
__sizeof__
()Size of object in memory, in bytes.
__str__
()Return str(self).
__subclasshook__
Abstract classes can override this to customize issubclass().
_contract
(arrays[, out, backend, …])The normal, core contraction.
_contract_with_conversion
(arrays, out, backend)Special contraction, i.e., contraction with a different backend but converting to and from that backend.
_get_backend_expression
(arrays, backend)_get_evaluated_constants
(backend)Retrieve or generate the cached list of constant operators (mixed in with None representing non-consts) and the remaining contraction list.
evaluate_constants
([backend])Convert any constant operands to the correct backend form, and perform as many contractions as possible to create a new list of operands, stored in
self._evaluated_constants[backend]
.Attributes
__dict__
__doc__
__module__
__weakref__
list of weak references to the object (if defined)
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