pip_services3_expressions.calculator.functions package

Submodules

Module contents

class pip_services3_expressions.calculator.functions.DefaultFunctionCollection

Bases: pip_services3_expressions.calculator.functions.FunctionCollection.FunctionCollection

Implements a list filled with standard functions.

class pip_services3_expressions.calculator.functions.DelegatedFunction(name: str, calculator: Callable[[List[pip_services3_expressions.variants.Variant.Variant], pip_services3_expressions.variants.IVariantOperations.IVariantOperations], pip_services3_expressions.variants.Variant.Variant])

Bases: pip_services3_expressions.calculator.functions.IFunction.IFunction

calculate(params: List[pip_services3_expressions.variants.Variant.Variant], variant_operations: pip_services3_expressions.variants.IVariantOperations.IVariantOperations) → pip_services3_expressions.variants.Variant.Variant 

The function calculation method.

Parameters

params – an array with function parameters.
variant_operations – Variants operations manager.

Returns

return function result.

property name: The function name.

class pip_services3_expressions.calculator.functions.FunctionCollection

Bases: pip_services3_expressions.calculator.functions.IFunctionCollection.IFunctionCollection

Implements a functions list.

add(func: pip_services3_expressions.calculator.functions.IFunction.IFunction)

Adds a new function to the collection.

Parameters: func – a function to be added.

clear(): Clears the collection.

find_by_name(name: str) → pip_services3_expressions.calculator.functions.IFunction.IFunction 

Finds function in the list by it’s name.

Parameters: name – The function name to be found.
Returns: A function or None if function was not found.

find_index_by_name(name: str) → int 

Finds function index in the list by it’s name.

Parameters: name – The function name to be found.
Returns: Function index in the list or -1 if function was not found.

get(index: int) → pip_services3_expressions.calculator.functions.IFunction.IFunction 

Get a function by its index.

Parameters: index – a function index.
Returns: a retrieved function.

get_all() → List[pip_services3_expressions.calculator.functions.IFunction.IFunction]

Get all functions stores in the collection

Returns: a list with functions.

property length

Gets a number of functions stored in the collection.

Returns: a number of stored functions.

remove(index: int)

Removes a function by its index.

Parameters: index – a index of the function to be removed.

remove_by_name(name: str)

Removes function by it’s name.

Parameters: name – The function name to be removed.

class pip_services3_expressions.calculator.functions.IFunction

Bases: abc.ABC

Defines an interface for expression function.