How to escape @ in a password in pymongo connection?

You should be able to escape the password using urllib.quote(). Although you should only quote/escape the password, and exclude the username: ;
otherwise the : will also be escaped into %3A.

For example:

import pymongo 
import urllib 

mongo_uri = "mongodb://username:" + urllib.parse.quote("p@ssword") + "@127.0.0.1:27001/"
client = pymongo.MongoClient(mongo_uri)

The above snippet was tested for MongoDB v3.2.x and PyMongo v3.2.2.

The example above assumed in the MongoDB URI connection string:

• The user is created in the admin database.
• The host mongod running on is 127.0.0.1 (localhost)
• The port mongod assigned to is 27001