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PytLab / gaft

A Genetic Algorithm Framework in Python (not for production level)
http://gaft.readthedocs.io/
GNU General Public License v3.0
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sum_fit maybe is 0 that causes error:ZeroDivisionError: float division by zero #48

Closed wkailiu closed 5 years ago

wkailiu commented 5 years ago

roulette_wheel_selection.py line 34: sum_fit = sum(fit) wheel = list(accumulate([i/sum_fit for i in fit]))

wkailiu commented 5 years ago

my solution:

sum_fit = sum(fit) if sum_fit != 0.0: wheel = list(accumulate([i/sum_fit for i in fit])) else: wheel = [0.0 for i in fit] wheel[len(wheel) - 1] = 1.0

gongyongq commented 5 years ago

my solution:

sum_fit = sum(fit) if sum_fit != 0.0: wheel = list(accumulate([i/sum_fit for i in fit])) else: wheel = [0.0 for i in fit] wheel[len(wheel) - 1] = 1.0

这个框架好Low，功能单一，速度还贼慢，远远不及pymoo等权威框架。我折腾了很久，弃坑了。说多了都是泪啊。

xeden3 commented 4 years ago

我也发现这个大坑了，只要是fit回来的值都是一样的，sum_fit就是zero