Product

This class is used to manipulate products. Any Product has a certain number of factors and also may have an exponent different from 1. When itering over a Product, the iteration will be over its factors and over the exponent.

So far, a Product does not have its own 'real' sign. The sign used to determine the writing rules (is there a '+' or a '-' at the beginning... ?) is most of the time the one of the first factor. For instance, if you have a Sum embedding these Products : 8×4, -6×2 and 9×3, you will have to know that the first term is like a positive (so, at the beginning of an expression, no '+' sign should be displayed) and that the third term either (but there, display a '+' sign) ; the second is like a negative (so, the '+' 'sign' of the Product shoudn't have to be displayed here...).

Possible args for __init__() :
None | Product | Number | Exponented | [Numbers|Exponenteds]

Field :
factor : it is the factors' list

Debugging info :

Check Product's complete doc

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