def main():
# Create a grammar and add some rules to it
grammar = RootGrammar()
name = HiddenRule("name", AlternativeSet("john", "bob", "anna"))
# greeting is either: 'hey', 'hey there' or 'hello'
greeting = HiddenRule("greeting", AlternativeSet(
Sequence("hey", OptionalGrouping("there")), "hello"))
# parting_phrase is either: 'good bye' or 'see you'
parting_phrase = HiddenRule("parting_phrase", AlternativeSet(
"good bye", "see you"))
# greet is a greeting followed by a name
greet = PublicRule("greet", Sequence(RuleRef(greeting), RuleRef(name)))
# goodbye is a parting phrase followed by a name
goodbye = PublicRule("goodbye", Sequence(
RuleRef(parting_phrase), RuleRef(name)))
grammar.add_rules(name, greeting, parting_phrase, greet, goodbye)
print("Root grammar compiles to the following:")
print(grammar.compile())
# Try matching some speech strings
print_matching(grammar, "hey john")
print_matching(grammar, "hey there john")
print_matching(grammar, "see you john")
# Try matching some hidden rules
print_matching(grammar, "bob")
print_matching(grammar, "hey there")
print_matching(grammar, "good bye")
def create_grammar(word_list, name, gram_file):
"""
read a list in a text file (```word_list````) and create
a grammar (```name```) file (```gram_file```) for that list,
such that the speech can one of any of the elements of the list
"""
upp_list = list()
grammar = RootGrammar(name=name, case_sensitive=True)
i = 0
for lines in word_list:
rule_name = "rule" + str(i)
upp = lines.upper().strip()
#print("upp is",upp)
if upp != "" and upp != "{" and upp != "}" and upp != "." and upp[
0] != "_":
r = PublicRule(rule_name, upp, case_sensitive=True)
grammar.add_rule(r)
upp_list.append(upp)
i = i + 1
with open(gram_file, 'wt') as g:
print(grammar.compile(), file=g)