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"""Modifed from https://github.com/thu-coai/CrossWOZ/blob/master/convlab2/util/crosswoz/dbquery.py"""
import json
import os
import re
from zipfile import ZipFile
from convlab.util.unified_datasets_util import (BaseDatabase,
download_unified_datasets)
def contains(arr, s):
return not len(tuple(filter(lambda item: (not (item.find(s) < 0)), arr)))
class Database(BaseDatabase):
def __init__(self):
"""extract data.zip and load the database."""
data_path = download_unified_datasets('crosswoz', 'data.zip', os.path.dirname(os.path.abspath(__file__)))
archive = ZipFile(data_path)
self.domains = ['景点', '餐馆', '酒店', '地铁', '出租']
domain2eng = {'景点': 'attraction', '餐馆': 'restaurant', '酒店': 'hotel', '地铁': 'metro'}
self.data = {}
for domain in self.domains[:-1]:
with archive.open('data/{}_db.json'.format(domain2eng[domain])) as f:
self.data[domain] = json.loads(f.read())
self.schema = {
'景点': {
'名称': {'params': None},
'门票': {'type': 'between', 'params': [None, None]},
'游玩时间': {'params': None},
'评分': {'type': 'between', 'params': [None, None]},
'周边景点': {'type': 'in', 'params': None},
'周边餐馆': {'type': 'in', 'params': None},
'周边酒店': {'type': 'in', 'params': None},
},
'餐馆': {
'名称': {'params': None},
'推荐菜': {'type': 'multiple_in', 'params': None},
'人均消费': {'type': 'between', 'params': [None, None]},
'评分': {'type': 'between', 'params': [None, None]},
'周边景点': {'type': 'in', 'params': None},
'周边餐馆': {'type': 'in', 'params': None},
'周边酒店': {'type': 'in', 'params': None}
},
'酒店': {
'名称': {'params': None},
'酒店类型': {'params': None},
'酒店设施': {'type': 'multiple_in', 'params': None},
'价格': {'type': 'between', 'params': [None, None]},
'评分': {'type': 'between', 'params': [None, None]},
'周边景点': {'type': 'in', 'params': None},
'周边餐馆': {'type': 'in', 'params': None},
'周边酒店': {'type': 'in', 'params': None}
},
'地铁': {
'起点': {'params': None},
'终点': {'params': None},
},
'出租': {
'起点': {'params': None},
'终点': {'params': None},
}
}
def query(self, domain: str, state: dict, topk: int) -> list:
"""
return a list of topk entities (dict containing slot-value pairs) for a given domain based on the dialogue state.
query database using belief state, return list of entities, same format as database
:param state: belief state of the format {domain: {slot: value}}
:param domain: maintain by DST, current query domain
:param topk: max number of entities
:return: list of entities
"""
if not domain:
return []
cur_query_form = {}
for slot, value in state[domain].items():
if not value:
continue
if slot == '出发地':
slot = '起点'
elif slot == '目的地':
slot = '终点'
if slot == '名称':
# DONE: if name is specified, ignore other constraints
cur_query_form = {'名称': value}
break
elif slot == '评分':
if re.match('(\d\.\d|\d)', value):
if re.match('\d\.\d', value):
score = float(re.match('\d\.\d', value)[0])
else:
score = int(re.match('\d', value)[0])
cur_query_form[slot] = [score, None]
# else:
# assert 0, value
elif slot in ['门票', '人均消费', '价格']:
low, high = None, None
if re.match('(\d+)-(\d+)', value):
low = int(re.match('(\d+)-(\d+)', value)[1])
high = int(re.match('(\d+)-(\d+)', value)[2])
elif re.match('\d+', value):
if '以上' in value:
low = int(re.match('\d+', value)[0])
elif '以下' in value:
high = int(re.match('\d+', value)[0])
else:
low = high = int(re.match('\d+', value)[0])
elif slot == '门票':
if value == '免费':
low = high = 0
elif value == '不免费':
low = 1
else:
print(value)
# assert 0
cur_query_form[slot] = [low, high]
else:
cur_query_form[slot] = value
cur_res = self.query_schema(field=domain, args=cur_query_form)
if domain == '出租':
res = [cur_res]
elif domain == '地铁':
res = []
for r in cur_res:
if not res and '起点' in r[0]:
res.append(r)
break
for r in cur_res:
if '终点' in r[0]:
res.append(r)
break
else:
res = cur_res
return res[:topk]
def query_schema(self, field, args):
if not field in self.schema:
raise Exception('Unknown field %s' % field)
if not isinstance(args, dict):
raise Exception('`args` must be dict')
db = self.data.get(field)
plan = self.schema[field]
for key, value in args.items():
if not key in plan:
raise Exception('Unknown key %s' % key)
value_type = plan[key].get('type')
if value_type == 'between':
if not value[0] is None:
plan[key]['params'][0] = float(value[0])
if not value[1] is None:
plan[key]['params'][1] = float(value[1])
else:
if not isinstance(value, str):
raise Exception('Value for `%s` must be string' % key)
plan[key]['params'] = value
if field in ['地铁', '出租']:
s = plan['起点']['params']
e = plan['终点']['params']
if not s or not e:
return []
if field == '出租':
return [
'出租 (%s - %s)' % (s, e), {
'领域': '出租',
'车型': '#CX',
'车牌': '#CP'
}
]
else:
def func1(item):
if item[0].find(s) >= 0:
return ['(起点) %s' % item[0], item[1]]
def func2(item):
if item[0].find(e) >= 0:
return ['(终点) %s' % item[0], item[1]]
return None
return list(filter(lambda item: not item is None, list(map(func1, db)))) + list(
filter(lambda item: not item is None, list(map(func2, db))))
def func3(item):
details = item[1]
for key, val in args.items():
val = details.get(key)
absence = val is None
options = plan[key]
if options.get('type') == 'between':
L = options['params'][0]
R = options['params'][1]
if not L is None:
if absence:
return False
else:
L = float('-inf')
if not R is None:
if absence:
return False
else:
R = float('inf')
if L > val or val > R:
return False
elif options.get('type') == 'in':
s = options['params']
if not s is None:
if absence:
return False
if contains(val, s):
return False
elif options.get('type') == 'multiple_in':
s = options['params']
if not s is None:
if absence:
return False
sarr = list(filter(lambda t: bool(t), s.split(' ')))
if len(list(filter(lambda t: contains(val, t), sarr))):
return False
else:
s = options['params']
if not s is None:
if absence:
return False
if val.find(s) < 0:
return False
return True
return [x[1] for x in filter(func3, db)]
if __name__ == '__main__':
db = Database()
assert issubclass(Database, BaseDatabase)
assert isinstance(db, BaseDatabase)
res = db.query("餐馆", {"餐馆":{'评分':'4.5以上'}}, topk=3)
from pprint import pprint
pprint(res)
print(len(res))
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