Along with this I needed to ask one more thing as for the definition of
class Zero , there are methods where S.Zero is returned . Has the word Zero
been hardcoded to 0 somewhere because
I don't understand how that returns value 0 . Similarly is the case with
`One` also .
On Saturday, May 17, 2014 6:50:45 AM UTC+5:30, Abhishek K Das wrote:
>
> def __new__(cls, name, **assumptions):
> """Symbols are identified by name and assumptions::
>
>
> >>> from sympy import Symbol
> >>> Symbol("x") == Symbol("x")
> True
> >>> Symbol("x", real=True) == Symbol("x", real=False)
> False
>
>
> """
>
>
> if assumptions.get('zero', False):
> return S.Zero
> is_commutative = fuzzy_bool(assumptions.get('commutative', True))
> if is_commutative is None:
> raise ValueError(
> '''Symbol commutativity must be True or False.''')
>
> I was studying how declaration of Symbol works with the help of winpdb .
> `name` is for the name of symbol and `assumptions` are the assumptions
> associated with it .
> What about the cls variable , I didn't understand it's use and what does
> assumptions.get('zero',False) mean ?
>
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