Connect mongodb from pymongo inside a docker container

Question

I am running an application where each of its component running inside separate containers.Now I have mongodb running locally,it's not part of a container.How can I connect the mongodb from inside of a container.Below is the approach I tried

 @app.get('/api/file', response_model=Employee) 
 async def readFIle():

 client = pymongo.MongoClient("mongodb://127.0.0.1:27017")
 mydb = client["test"]
 employees = mydb.employees
 employee = employees.find({"name" : "Istiaq Hossain"})
 print(employee)
 return employee

It's giving following error

pymongo.errors.ServerSelectionTimeoutError: 127.0.0.1:27017: [Errno 111] Connection refused, 
Timeout: 30s, Topology Description: <TopologyDescription id: 627939239bf86a15e3ebfd03, 
topology_type: Unknown, servers: [<ServerDescription ('127.0.0.1', 27017)