2021-03-20 18:07:03 +01:00
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import random
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import re
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try: input = raw_input
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except NameError: pass
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class Key:
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def __init__(self, word, weight, decomps):
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self.word = word
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self.weight = weight
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self.decomps = decomps
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class Decomp:
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def __init__(self, parts, save, reasmbs):
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self.parts = parts
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self.save = save
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self.reasmbs = reasmbs
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self.next_reasmb_index = 0
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class Eliza:
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def __init__(self):
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self.initials = []
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self.finals = []
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self.quits = []
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self.pres = {}
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self.posts = {}
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self.synons = {}
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self.keys = {}
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self.memory = []
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def load(self, path):
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key = None
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decomp = None
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with open(path) as file:
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for line in file:
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if not line.strip():
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continue
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tag, content = [part.strip() for part in line.split(':')]
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if tag == 'initial':
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self.initials.append(content)
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elif tag == 'final':
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self.finals.append(content)
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elif tag == 'quit':
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self.quits.append(content)
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elif tag == 'pre':
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parts = content.split(' ')
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self.pres[parts[0]] = parts[1:]
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elif tag == 'post':
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parts = content.split(' ')
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self.posts[parts[0]] = parts[1:]
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elif tag == 'synon':
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parts = content.split(' ')
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self.synons[parts[0]] = parts
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elif tag == 'key':
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parts = content.split(' ')
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word = parts[0]
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weight = int(parts[1]) if len(parts) > 1 else 1
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key = Key(word, weight, [])
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self.keys[word] = key
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elif tag == 'decomp':
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parts = content.split(' ')
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save = False
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if parts[0] == '$':
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save = True
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parts = parts[1:]
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decomp = Decomp(parts, save, [])
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key.decomps.append(decomp)
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elif tag == 'reasmb':
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parts = content.split(' ')
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decomp.reasmbs.append(parts)
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def _match_decomp_r(self, parts, words, results):
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if not parts and not words:
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return True
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if not parts or (not words and parts != ['*']):
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return False
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if parts[0] == '*':
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for index in range(len(words), -1, -1):
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results.append(words[:index])
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if self._match_decomp_r(parts[1:], words[index:], results):
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return True
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results.pop()
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return False
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elif parts[0].startswith('@'):
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root = parts[0][1:]
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if not root in self.synons:
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raise ValueError("Unknown synonym root {}".format(root))
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if not words[0].lower() in self.synons[root]:
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return False
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results.append([words[0]])
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return self._match_decomp_r(parts[1:], words[1:], results)
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elif parts[0].lower() != words[0].lower():
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return False
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else:
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return self._match_decomp_r(parts[1:], words[1:], results)
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def _match_decomp(self, parts, words):
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results = []
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if self._match_decomp_r(parts, words, results):
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return results
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return None
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def _next_reasmb(self, decomp):
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index = decomp.next_reasmb_index
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result = decomp.reasmbs[index % len(decomp.reasmbs)]
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decomp.next_reasmb_index = index + 1
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return result
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def _reassemble(self, reasmb, results):
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output = []
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for reword in reasmb:
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if not reword:
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continue
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if reword[0] == '(' and reword[-1] == ')':
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index = int(reword[1:-1])
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if index < 1 or index > len(results):
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raise ValueError("Invalid result index {}".format(index))
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insert = results[index - 1]
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for punct in [',', '.', ';']:
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if punct in insert:
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insert = insert[:insert.index(punct)]
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output.extend(insert)
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else:
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output.append(reword)
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return output
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def _sub(self, words, sub):
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output = []
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for word in words:
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word_lower = word.lower()
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if word_lower in sub:
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output.extend(sub[word_lower])
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else:
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output.append(word)
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return output
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def _match_key(self, words, key):
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for decomp in key.decomps:
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results = self._match_decomp(decomp.parts, words)
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if results is None:
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continue
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results = [self._sub(words, self.posts) for words in results]
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reasmb = self._next_reasmb(decomp)
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if reasmb[0] == 'goto':
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goto_key = reasmb[1]
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if not goto_key in self.keys:
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raise ValueError("Invalid goto key {}".format(goto_key))
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return self._match_key(words, self.keys[goto_key])
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output = self._reassemble(reasmb, results)
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if decomp.save:
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self.memory.append(output)
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continue
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return output
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return None
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def respond(self, text):
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if text.lower() in self.quits:
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return None
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text = re.sub(r'\s*\.+\s*', ' . ', text)
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text = re.sub(r'\s*,+\s*', ' , ', text)
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text = re.sub(r'\s*;+\s*', ' ; ', text)
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words = [w for w in text.split(' ') if w]
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words = self._sub(words, self.pres)
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keys = [self.keys[w.lower()] for w in words if w.lower() in self.keys]
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keys = sorted(keys, key=lambda k: -k.weight)
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output = None
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for key in keys:
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output = self._match_key(words, key)
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if output:
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break
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if not output:
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if self.memory:
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index = random.randrange(len(self.memory))
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output = self.memory.pop(index)
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else:
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output = self._next_reasmb(self.keys['xnone'].decomps[0])
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return " ".join(output)
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def initial(self):
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return random.choice(self.initials)
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def final(self):
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return random.choice(self.finals)
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def run(self):
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print(self.initial())
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while True:
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sent = input('> ')
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output = self.respond(sent)
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if output is None:
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break
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print(output)
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print(self.final())
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def main():
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eliza = Eliza()
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eliza.load('doctor.txt')
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eliza.run()
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if __name__ == '__main__':
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2021-03-22 11:49:29 +01:00
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main()
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