专家系统--pyKE小例01

事实库[family.kfb]

son_of(david, bruce)
son_of(bruce, thomas)
son_of(thomas, frederik)
son_of(frederik, hiram)

规则库[fc_familykrb]

direct_father_son
    foreach
        family.son_of($son, $father)
    assert
        family.father_son($father, $son, ())

grand_father_son
    foreach
        family.father_son($father, $grand_son, ())
        family.father_son($grand_father, $father, ())
    assert
        family.father_son($grand_father, $grand_son, (grand))

great_grand_father_son
    foreach
        family.father_son($father, $gg_son, ())
        family.father_son($gg_father, $father, ($prefix1, *$rest_prefixes))
    assert
        family.father_son($gg_father, $gg_son,(great, $prefix1, *$rest_prefixes))

driver.py

from pyke import knowledge_engine

# 第一步. 编译pyKe资源文件
# 1..kfb files define fact bases, which are compiled into .fbc pickle files.
# 2..krb files define rule bases, which are compiled into 1 to 3 .py Python source files.
# 3..kqb files define question bases, which are compiled into .qbc pickle files.
engine = knowledge_engine.engine(__file__)
# 第二步：删除特殊情况的事实及失效所有的关系规则
engine.reset()
# 第三步，激活指定的规则库
engine.activate('fc_family')  # This is where the rules are run!
# 第三步，获取推理生成规则
rs = engine.get_kb('family').dump_specific_facts()
print(rs)

编译结果：

compiled_pyke_files.py是一个文件目录文件。
fc_familyh_fc.py是正向推荐的py源代码。
运行结果：

father_son('bruce', 'david', ())
father_son('thomas', 'bruce', ())
father_son('frederik', 'thomas', ())
father_son('hiram', 'frederik', ())
father_son('thomas', 'david', ('grand',))
father_son('frederik', 'bruce', ('grand',))
father_son('hiram', 'thomas', ('grand',))
father_son('frederik', 'david', ('great', 'grand'))
father_son('hiram', 'bruce', ('great', 'grand'))
father_son('hiram', 'david', ('great', 'great', 'grand'))