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Added metaclass to create dummy Paramter/Variables #298

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Added metaclass to create dummy Paramter/Variables #298

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18 changes: 16 additions & 2 deletions symfit/core/argument.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,24 @@
import numbers
import warnings

from sympy.core.symbol import Symbol
from sympy.core.symbol import Symbol, Dummy
from sympy.core.assumptions import ManagedProperties
import builtins


class Argument(Symbol):
class DummyMeta(ManagedProperties):

def __new__(cls, name, bases, namespace, **kwargs):
try:
if name == 'Argument' and builtins.symfit_dummy:
bases = (Dummy, )
except AttributeError:
pass

cls = super().__new__(cls, name, bases, namespace)
return cls

class Argument(Symbol, metaclass=DummyMeta):
"""
Base class for :mod:`symfit` symbols. This helps make :mod:`symfit` symbols
distinguishable from :mod:`sympy` symbols.
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