def eval(self, st):
func_args, func_body = st.get(self.value)
if len(func_args) != len(self.children):
raise ValueError('Unmatching sizes between defined function args' +
f' and calling args ({len(func_args)} -- ' +
f'{len(self.children)})')
inner_st = SymbolTable(father=st)
inner_st.set(self.value, None) # default return value
for key, value in zip(func_args, self.children):
inner_st.set(key, value.eval(st))
func_body.eval(inner_st)
return inner_st.get(self.value)
def main():
table = SymbolTable()
table.put(LetterGrade("A+"), 4.33)
table.put(LetterGrade("A "), 4.00)
table.put(LetterGrade("A-"), 3.67)
table.put(LetterGrade("B+"), 3.33)
table.put(LetterGrade("B "), 3.00)
table.put(LetterGrade("B-"), 2.67)
table.put(LetterGrade("C+"), 2.33)
table.put(LetterGrade("C "), 2.00)
table.put(LetterGrade("C-"), 1.67)
table.put(LetterGrade("D "), 1.00)
table.put(LetterGrade("F "), 0.00)
for key in table.key_list():
print(key.letter + key.extent, table.get(key))
