Has Exponented factors & an exponent. More...

Inheritance diagram for core.base_calculus.Product:

Public Member Functions
def	__init__
	Constructor.
def	get_factors_list_except
	Returns the factors' list of the Product except the given one.
def	get_first_factor
	Returns the first Sum/Item factor of the Product.
def	get_minus_signs_nb
	Returns the number of - signs (negative factors) in the Product.
def	get_factors_list
	Returns the factors' list of a given kind (numeric, literal...) For instance, for the product : 2x × (-4x²) × (x + 3)³ × 5 × (x²)³ × (-1)² × (2×3)², this method would return :
def	set_factor
def	into_str
	Creates a string of the given object in the given ML.
def	calculate_next_step
	Returns the next calculated step of a numeric Product.
def	expand_and_reduce_next_step
	Returns the next step of reduction of the Product It won't check if it is expandable.
def	__cmp__
	Compares two Products Returns 0 if all factors are the same in the same order and if the exponents are also the same /!\ a × b will be different from b × a It's not a mathematical comparison, but a "displayable"'s one.
def	operator
	Defines the performed CommutativeOperation as a Product.
def	multiply_symbol_is_required
	True if the usual writing rules require a × between two factors.
def	requires_brackets
	True if (one)self requires brackets inside of a Product.
def	requires_inner_brackets
	True if the argument requires inner brackets The reason for requiring them is having an exponent different from 1 and several terms or factors (in the case of Products & Sums)
def	order
	Returns the Product once put in order.
def	reduce_
	Return a reduced Product (if possible) For instance, giving this Product : 2x × (-4x²) × (x + 3)³ × 5 × (x²)³ × (-1)² × (2×3)², reduce_() would return :
def	is_null
	True if any of the factors is null.
def	is_displ_as_a_single_1
	True if the Product contains only single 1s.
def	is_displ_as_a_single_minus_1
	True if the Product can be displayed as a single -1 For instance, the Product 1×1×(-1)×1.
def	is_displ_as_a_single_0
	True if the object can be DISPLAYED as a single 0 For instance, the Product 0×0×0×0 (but NOT 0×1)
def	is_reducible
	True if the Product is reducible This is based on the result of the get_factors_list method.
Public Attributes
	str_openmark
	str_closemark
Properties
	factor

Detailed Description

Has Exponented factors & an exponent.

Iterable. Two display modes.

Definition at line 4130 of file base_calculus.py.

Constructor & Destructor Documentation

def core.base_calculus.Product.__init__	(	self,
		arg
	)

Constructor.

Warning:: Might raise an UncompatibleType exception.

Parameters:

arg None|Product|Number|Exponented|[Numbers|Exponenteds] In the case of the list, the Products having an exponant equal to 1 won't be treated so that their factors are inserted in the current Product instead of inserting a factor as a Product. If it would, then the compact and non compact display properties might be lost. (For instance, multiplying two Monomials and setting the compact display field of the resulting Product to False would result in displaying all the Monomials Items which isn't always wished) If the argument isn't of the kinds listed above, an exception will be raised. Giving None or an empty list is equivalent to giving 1. The exponent of a Product is 'outside' (like 3 in (4×5x)³)

Returns:: An instance of Product

Definition at line 4153 of file base_calculus.py.

Referenced by core.calculus.Equation.__init__(), and core.root_calculus.Value.substitute().

Member Function Documentation

def core.base_calculus.Product.__cmp__	(	self,
		objct
	)

Compares two Products Returns 0 if all factors are the same in the same order and if the exponents are also the same /!\ a × b will be different from b × a It's not a mathematical comparison, but a "displayable"'s one.

Returns:: 0 if all factors are the same in the same order & the exponent

Definition at line 5468 of file base_calculus.py.

References core.base_calculus.Item.exponent, core.root_calculus.Exponented.exponent, core.base_calculus.Fraction.exponent, and core.base_calculus.Product.factor.

def core.base_calculus.Product.calculate_next_step	(	self,
		options
	)

Returns the next calculated step of a numeric Product.

Todo:

This method is only very partially implemented (see source code)

The way the exponents are handled is still to be decided

the inner '-' signs (±(-2)) are not handled by this method so far

Reimplemented from core.root_calculus.Calculable.

Definition at line 5110 of file base_calculus.py.

Referenced by core.base_calculus.CommutativeOperation.evaluate(), core.base_calculus.Product.expand_and_reduce_next_step(), and core.base_calculus.Sum.expand_and_reduce_next_step().

def core.base_calculus.Product.expand_and_reduce_next_step	(	self,
		options
	)

Returns the next step of reduction of the Product It won't check if it is expandable.

Either it IS and the object is not just a Product but an Expandable or it isn't.

Returns:: Exponented

Reimplemented from core.root_calculus.Calculable.

Reimplemented in core.base_calculus.BinomialIdentity, and core.base_calculus.Expandable.

Definition at line 5361 of file base_calculus.py.

Referenced by core.base_calculus.Product.calculate_next_step(), and core.base_calculus.Sum.calculate_next_step().

def core.base_calculus.Product.get_factors_list	(	self,
		given_kind
	)

Returns the factors' list of a given kind (numeric, literal...) For instance, for the product : 2x × (-4x²) × (x + 3)³ × 5 × (x²)³ × (-1)² × (2×3)², this method would return :

in the case of simple numeric items : [2, -4, 5, (-1)², 2², 3²]
in the case of simple literal items : [x, x², x**6]
in the "others" list : [(x+3)³] This method helps to reduce a Product. It doesn't calculate anything and doesn't manage exotic cases (imbricated Products...) which are too complex to foresee. As far as I could... (later note : but I'm not sure it doesn't manage them now, I might have done that later than this comment). It will still be convenient to reorder the factors of a Monomials Product.
Parameters:

given_kind : NUMERIC | LITERALS | OTHERS

Returns:
a list containing the factors

Todo:
The - signs of the literals should be treated as -1 in the numeric list (and shouldn't remain in the literals' list)

Definition at line 4332 of file base_calculus.py.

References core.base_calculus.CommutativeOperation.compact_display, core.base_calculus.Item.dbg_str(), core.root_calculus.Value.dbg_str(), core.calculus.Equation.dbg_str(), core.base_calculus.SquareRoot.dbg_str(), core.base_calculus.Quotient.dbg_str(), core.base_calculus.Fraction.dbg_str(), core.base_calculus.CommutativeOperation.dbg_str(), core.base_calculus.Monomial.dbg_str(), core.base_calculus.Polynomial.dbg_str(), core.base_calculus.Operation.element, core.base_calculus.Item.exponent, core.root_calculus.Exponented.exponent, and core.base_calculus.Fraction.exponent.

Referenced by core.base_calculus.Product.is_reducible(), core.base_calculus.Product.order(), and core.base_calculus.Product.reduce_().

def core.base_calculus.Product.get_first_factor ( self )

Returns the first Sum/Item factor of the Product.

Warning:: Maybe not functionnal because of the 1's... For instance, if <factor1,factor2> is a Product & [term1,term2] a Sum: <<2,3>,x> would return 2 <[2,3],x>² would return (2+3)² <<2x>²,4> would return 2²

Todo:: check the intricate case of <<[<0, 1>]>, 4>

Definition at line 4271 of file base_calculus.py.

References core.base_calculus.Item.exponent, core.root_calculus.Exponented.exponent, core.base_calculus.Fraction.exponent, and core.base_calculus.Product.factor.

Referenced by core.base_calculus.Product.expand_and_reduce_next_step().

def core.base_calculus.Product.into_str	(	self,
		options
	)

Creates a string of the given object in the given ML.

Parameters:

options Any options

Returns:: The formated string

Reimplemented from core.base.Printable.

Reimplemented in core.base_calculus.BinomialIdentity.

Definition at line 4514 of file base_calculus.py.

def core.base_calculus.Product.is_displ_as_a_single_1 ( self )

True if the Product contains only single 1s.

For instance, 1×1×1

Reimplemented from core.root_calculus.Calculable.

Definition at line 5710 of file base_calculus.py.

References core.base_calculus.Product.factor, core.root_calculus.Calculable.is_displ_as_a_single_neutral(), core.base_calculus.Item.is_displ_as_a_single_neutral(), core.base_calculus.SquareRoot.is_displ_as_a_single_neutral(), core.base_calculus.Quotient.is_displ_as_a_single_neutral(), and core.base_calculus.CommutativeOperation.is_displ_as_a_single_neutral().

Referenced by core.base_calculus.Expandable.__init__(), core.base_calculus.Product.calculate_next_step(), core.base_calculus.Expandable.expand(), core.base_calculus.Expandable.expand_and_reduce_next_step(), core.base_calculus.Product.into_str(), core.base_calculus.Product.is_reducible(), core.base_calculus.Sum.is_reducible(), and core.base_calculus.Sum.requires_inner_brackets().

def core.base_calculus.Product.is_reducible ( self )

True if the Product is reducible This is based on the result of the get_factors_list method.

Returns:: True|False

Todo:: check the comment in the code Fix the problem bound to the get_factors list not giving - signs of literals as -1 in the list of numerics.

Definition at line 5778 of file base_calculus.py.

Referenced by core.base_calculus.Product.expand_and_reduce_next_step().

def core.base_calculus.Product.multiply_symbol_is_required	(	self,
		objct,
		position
	)

True if the usual writing rules require a × between two factors.

Parameters:

objct	The other one
position	The position (integer) of self in the Product

Todo:: check Why in source code

Returns:: True if the writing rules require × between self & obj

Reimplemented from core.root_calculus.Calculable.

Definition at line 5505 of file base_calculus.py.

References core.base_calculus.Product.factor, core.base_calculus.Item.multiply_symbol_is_required(), core.base_calculus.SquareRoot.multiply_symbol_is_required(), core.base_calculus.Quotient.multiply_symbol_is_required(), and core.base_calculus.Product.multiply_symbol_is_required().

Referenced by core.base_calculus.Product.into_str(), core.base_calculus.Product.multiply_symbol_is_required(), and core.base_calculus.Sum.multiply_symbol_is_required().

def core.base_calculus.Product.reduce_ ( self )

Return a reduced Product (if possible) For instance, giving this Product : 2x × (-4x²) × (x + 3)³ × 5 × (x²)³ × (-1)² × (2×3)², reduce_() would return :

-1440 * x⁹ * (x + 3)³

Definition at line 5649 of file base_calculus.py.

References core.base_calculus.Item.dbg_str(), core.root_calculus.Value.dbg_str(), core.calculus.Equation.dbg_str(), core.base_calculus.SquareRoot.dbg_str(), core.base_calculus.Quotient.dbg_str(), core.base_calculus.Fraction.dbg_str(), core.base_calculus.CommutativeOperation.dbg_str(), core.base_calculus.Monomial.dbg_str(), core.base_calculus.Polynomial.dbg_str(), core.base_calculus.CommutativeOperation.evaluate(), and core.base_calculus.Product.get_factors_list().

Referenced by core.base_calculus.BinomialIdentity.__init__(), core.base_calculus.Expandable.expand(), and core.base_calculus.Product.expand_and_reduce_next_step().

def core.base_calculus.Product.requires_brackets	(	self,
		position
	)

True if (one)self requires brackets inside of a Product.

For instance, a Sum with several terms or a negative Item would.

Parameters:

position The position of the object in the Product

Returns:: True if the object requires brackets in a Product

Reimplemented from core.root_calculus.Calculable.

Definition at line 5542 of file base_calculus.py.

References core.base_calculus.CommutativeOperation.throw_away_the_neutrals().

Referenced by core.base_calculus.Product.into_str().

def core.base_calculus.Product.requires_inner_brackets ( self )

True if the argument requires inner brackets The reason for requiring them is having an exponent different from 1 and several terms or factors (in the case of Products & Sums)

Returns:: True if the object requires inner brackets

Reimplemented from core.root_calculus.Calculable.

Definition at line 5581 of file base_calculus.py.

References core.root_calculus.Exponented.exponent_must_be_displayed().

Referenced by core.base_calculus.Product.into_str().

def core.base_calculus.Product.set_factor	(	self,
		n,
		arg
	)

Parameters:

n	: number of the factor to set
arg	: the object to put as n-th factor

Definition at line 4503 of file base_calculus.py.

References core.base_calculus.Operation.set_element().

Property Documentation

core::base_calculus.Product::factor [static]

Initial value:

property(CommutativeOperation.get_element,
                      doc = "To access the factors of the Product.")

Definition at line 4491 of file base_calculus.py.

The documentation for this class was generated from the following file:

mathmaker_dev/core/base_calculus.py

Public Member Functions

Public Attributes

Properties

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Property Documentation