neo4j用py2neo创建关系时，报错ClientError: SyntaxError: Invalid input '{': expected "+" or "-"

代码：

for i in holder.values:
   a = matcher.match("股票", TS代码=i[1]).first()
   b = matcher.match("股东", TS代码=i[1])
   for j in b:
       r = Relationship(j, '参股', a)
       graph.create(r)
       print('TS', str(i[1]))