def __new__(cls, name, default=-1, commutative=True, **assumptions):
"""Constructs and returns a new Variable object
Args:
name (str): the name of the variable to create
default: the default value to assign to the variable
commutative (boolean): whether the variable commutes or not
**assumptions: assumptions that operate on a sympy level
Returns:
new instance of a Variable
"""
instance = Dummy.__new__(cls, name, commutative=commutative, **assumptions)
instance.default = default
instance.is_solved = False
instance.solved = -1
return instance
def __new__(cls, name=None, longname=None):
if name is None or name == "":
name = "NoName_"+str(Quantity.dummy_count)
Quantity.dummy_count += 1
self = Dummy.__new__(cls, name)
else:
self = Symbol.__new__(cls, name)
self.count = Quantity.quantity_count
Quantity.quantity_count += 1
self.abbrev = name
self.name = name
self.longname = longname
self.value = None
self.value_formula = None
self.error = None
self.error_formula = None
self.prefer_unit = None
self.dim = None
return self
def __new__(cls, name=None, dummy_index=None, value=0, **assumptions):
obj = Dummy.__new__(cls, name, dummy_index, **assumptions)
obj.value = 0.0
return obj
