8.6.5. Var

class Var

Variable in the model. The index of a variable increases from 0. Each time a variable is added to the model, the index is increased by 1.

Properties

index

The index position of the variable
index

The index position of the variable.

Methods

getAttr()

Get the attribute value of a variable

sameAs()

Test whether the variable is the same as another variable

setAttr()

Set the attribute value of a variable
getAttr(attrname)

Get the attribute value of a variable

Parameters

attrname – Attribute name

example:

m = Model()
x = m.addVar()
print(x.varname)
print(x.getAttr(MDO.Attr.VarName))

Note

Attribute can also be read and written directly through object attributes, in this case, the attribute name is case-insensitive

sameAs(var)

Test whether the variable is the same as another variable.

Parameters

var – Another variable to be tested

Returns

A bool result

example:

m = Model()
x = m.addVar()
print(x.sameAs(m.getVars()[0]))
setAttr(attrname, attrvalue)

Set the attribute value of a variable.

Parameters

  • attrname – The name of the attribute.

  • attrvalue – The value of the attribute to be set.

example:

m = Model()
x = m.addVar()
x.ub = 1.0
x.setAttr(MDO.Attr.UB, 2.0)
print(x.ub == 2.0)

Note

Attribute can also be read and written directly through object attributes, in this case, the attribute name is case-insensitive