paulin/EasyGA
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Using try except

Browse Source
This commit is contained in:
SimpleArt
2020-12-28 15:06:29 -05:00
parent d0894c18fb
commit a1d72ec868
1 changed files with 20 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/termination_point/termination_methods.py
View File

@ -3,8 +3,8 @@ def _add_by_fitness_goal(termination_impl):
def new_method(ga): def new_method(ga):
# If fitness goal is set, check it. # Try to check the fitness goal
if ga.fitness_goal is not None and ga.population is not None: try:
# If minimum fitness goal reached, stop ga. # If minimum fitness goal reached, stop ga.
if ga.target_fitness_type == 'min' and ga.population[0].fitness <= ga.fitness_goal: if ga.target_fitness_type == 'min' and ga.population[0].fitness <= ga.fitness_goal:
@ -14,6 +14,14 @@ def _add_by_fitness_goal(termination_impl):
elif ga.target_fitness_type == 'max' and ga.population[0].fitness >= ga.fitness_goal: elif ga.target_fitness_type == 'max' and ga.population[0].fitness >= ga.fitness_goal:
return False return False
# Fitness or fitness goals are None
except TypeError:
pass
# Population not initialized
except AttributeError:
pass
# Check other termination methods # Check other termination methods
return termination_impl(ga) return termination_impl(ga)
@ -42,8 +50,8 @@ def _add_by_tolerance_goal(termination_impl):
def new_method(ga): def new_method(ga):
# If tolerance is set, check it. # If tolerance is set, check it, if possible.
if ga.tolerance_goal is not None and ga.population is not None: try:
best_fitness = ga.population[0].fitness best_fitness = ga.population[0].fitness
threshhold_fitness = ga.population[round(ga.percent_converged*len(ga.population))].fitness threshhold_fitness = ga.population[round(ga.percent_converged*len(ga.population))].fitness
tol = ga.tolerance_goal * (1 + abs(best_fitness)) tol = ga.tolerance_goal * (1 + abs(best_fitness))
@ -52,6 +60,14 @@ def _add_by_tolerance_goal(termination_impl):
if abs(best_fitness - threshhold_fitness) < tol: if abs(best_fitness - threshhold_fitness) < tol:
return False return False
# Fitness or tolerance goals are None
except TypeError:
pass
# Population not initialized
except AttributeError:
pass
# Check other termination methods # Check other termination methods
return termination_impl(ga) return termination_impl(ga)