Coverage for gpkit\constraints\array.py : 100%
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1"Implements ArrayConstraint"
2from .single_equation import SingleEquationConstraint
5class ArrayConstraint(SingleEquationConstraint, list):
6 """A ConstraintSet for prettier array-constraint printing.
8 ArrayConstraint gets its `sub` method from ConstrainSet,
9 and so `left` and `right` are only used for printing.
11 When created by NomialArray `left` and `right` are likely to be
12 be either NomialArrays or Varkeys of VectorVariables.
13 """
14 def __init__(self, constraints, left, oper, right):
15 self.constraints = constraints
16 list.__init__(self, constraints)
17 SingleEquationConstraint.__init__(self, left, oper, right)
19 def __iter__(self):
20 yield from self.constraints.flat
22 def lines_without(self, excluded):
23 "Returns lines for indentation in hierarchical printing."
24 return self.str_without(excluded).split("\n")
26 def __bool__(self):
27 "Allows the use of '=' NomialArrays as truth elements."
28 return False if self.oper != "=" else bool(self.constraints.all())