Python store textfile into mangodb

 "failing because no such method exists." % self.__name.split(".")[-1]
TypeError: 'Collection' object is not callable. If you meant to call the 'insert' method on a 'Collection' object it is failing because no such method exists.

 from pymongo import MongoClient
client = MongoClient()
db = client.test_database  # use a database called "test_database"
collection = db.files   # and inside that DB, a collection called "files"

f = open('hashes.txt')  # open a file

# build a document to be inserted
text_file_doc = {"file_name": "hashes.txt"}
# insert the contents into the "file" collection
collection.insert(text_file_doc)
What I have tried:

i have tried above code .but got errors i aslo tried it with insert_one and insert_many but still errors.