pymongo如何建索引

import pymongo
# 连接数据库
client = pymongo.MongoClient('mongodb://192.168.1.202')
db = client["数据库名"]
coll = db['集合名']
#创建唯一索引
coll.create_index([('company', pymongo.ASCENDING)], unique=True)
#查看创建的索引
print(list(coll.index_information()))