我试图写一个代码，可以创建几个句子和用户要求的单词，但我遇到了一些问题，无法从万能的谷歌找到答案。寻求任何建议(同时，我认为有一种方法可以缩短它)。在class CallCentre(object):

"""This is a class."""

def __init__(self):

self.nouns = ['koer', 'porgand', 'madis', 'kurk', 'tomat']

self.targets = ['koera', 'porgandit', 'madist', 'kurki', 'tomatit']

self.verbs = ['sööb', 'lööb', 'jagab', 'tahab', 'ei taha']

self.adjectives = ['ilus', 'kole', 'pahane', 'magus', 'sinu']

self.targetadjectives = ['ilusat', 'koledat', 'pahast', 'magusat', 'sinu']

self.sentence = 'noun verb target'

self.twosentences = 'sentence sentence'

self.beautifulsentence = 'adjective noun verb targetadjective target .'

self.generators = {

'noun': self.generator(self.nouns),

'target': self.generator(self.targets),

'verb': self.generator(self.verbs),

'adjective': self.generator(self.adjectives),

'targetadjective': self.generator(self.targetadjectives),

'sentence': self.generator(self.sentence),

'twosentences': self.generator(self.twosentences),

'beautifulsentence': self.generator(self.beautifulsentence)

}

def generator(self, array):

i = -1

while True:

i = (i + 1) % 5

yield array[i]

def create_sentence(self, syntax):

for w in syntax.split:

if w == 'noun':

next(self.generators['noun'])

elif w == 'target':

next(self.generators['target'])

elif w == 'verb':

next(self.generators['verb'])

elif w == 'adjective':

next(self.generators['adjective'])

elif w == 'targetadjective':

next(self.generators['targetadjective'])

elif w == 'sentence':

next(self.generators['sentence'])

elif w == 'twosentences':

next(self.generators['twosentences'])

elif w == 'beautifulsentence':

next(self.generators['beautifulsentence'])

if __name__ == '__main__':

centre = CallCentre()

print(centre.create_sentence('noun'))

以下是错误消息：

^{pr2}$