Pymongo Connection with MongoDB atlas - Error 111 Connection refused - python-3.x

Question

I'm setting up a cron job, where it fetches some data from MongoDB atlas in Python3 through Pymongo in Cpanel. I always get a Error 111 Connnection refused.
I using python3.6 and pymongo-3.9.0, Cloud MongoDB-4.0.2
I have tried via SSHtunnel forwarder, but not sure how to give host_ip_addres, where MongoDB is in cluster
class DbConnection():
def __init__(self):
self.connectionServer = "mongodb+srv://"
self.userName = "name"
self.userPass = "pass"
self.connectionCluster = "#temp-cluster0-lt2rb.mongodb.net"
self.connectionDb = "developmentDB"
def db_connect(self):
''' This function is used to connect to remote db with authentication
Return type --> returns the url string of the db
parameters--> self
'''
try:
connectionUrl = self.connectionServer + self.userName + ":" + self.userPass + self.connectionCluster + "/test?retryWrites=true&w=majority"
print(connectionUrl)
myClient = pymongo.MongoClient(connectionUrl, port=12312)
db = myClient.test
print(myClient.test)
I'm expecting it to connect to the MongoDB cluster DB and read/Write the documents through it.

Answer 1

So the comments for the question solved the issue, so i'll just put this here for any future reference
The error can be resulted for must people because of a miss-configuration when moving from a self hosted MongoDB to a Remoted host service (Like MongoDB Atlas)
So, the +srv is DNS Seed List Connection Format.
When switching from port based connection to DNS seed based connection, we should remove any port configuration from our connection string, i.e:
class DbConnection():
def __init__(self):
self.connectionServer = "mongodb+srv://"
self.userName = "name"
self.userPass = "pass"
self.connectionCluster = "#temp-cluster0-lt2rb.mongodb.net"
self.connectionDb = "developmentDB"
def db_connect(self):
''' This function is used to connect to remote db with authentication
Return type --> returns the url string of the db
parameters--> self
'''
try:
connectionUrl = self.connectionServer + self.userName + ":" + self.userPass + self.connectionCluster + "/test?retryWrites=true&w=majority"
print(connectionUrl)
// myClient = pymongo.MongoClient(connectionUrl, port=12312)
// We remove the PORT
myClient = pymongo.MongoClient(connectionUrl)
db = myClient.test
print(myClient.test)