1"Implements Loose" 

2from .set import ConstraintSet 

3from ..small_scripts import appendsolwarning, initsolwarning 

4 

5 

6class Loose(ConstraintSet): 

7 "ConstraintSet whose inequalities must result in an equality." 

8 senstol = 1e-5 

9 raiseerror = False 

10 

11 def __init__(self, constraints, *, senstol=None): 

12 super().__init__(constraints) 

13 self.senstol = senstol or self.senstol 

14 

15 def process_result(self, result): 

16 "Checks that all constraints are satisfied with equality" 

17 super().process_result(result) 

18 initsolwarning(result, "Unexpectedly Tight Constraints") 

19 for constraint in self.flat(): 

20 c_senss = result["sensitivities"]["constraints"].get(constraint, 0) 

21 if c_senss >= self.senstol: 

22 cstr = ("Constraint [ %.100s... %s %.100s... )" 

23 % (constraint.left, constraint.oper, constraint.right)) 

24 msg = ("%s is not loose: it has a sensitivity of %+.4g." 

25 " (Allowable sensitivity: %.4g)" % 

26 (cstr, c_senss, self.senstol)) 

27 appendsolwarning(msg, (c_senss, constraint), result, 

28 "Unexpectedly Tight Constraints") 

29 if self.raiseerror: 

30 raise RuntimeWarning(msg)