I have the string s = "users.count()"
and the db object.
How do I combine db and s such that print combination(db,s) prints the total number of users?
I tried db[s] and db+s and both don't work.
Thanks!
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too less informationuser1767754– user17677542014-09-17 05:43:34 +00:00Commented Sep 17, 2014 at 5:43
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what more information do you need?wemadeit– wemadeit2014-09-17 05:54:36 +00:00Commented Sep 17, 2014 at 5:54
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1 Answer
Check the docs
1) Initialize your connection first
from pymongo import MongoClient
client = MongoClient('localhost', 27017)
2) Select your db
db = client["db_name"] #replace db_name with your database name
3) Run count() on your collection. Say, your collection name is users
print db.users.count()
# OR
print db["users"].count()
If you have something like s = "users.count()" and want to execute s. Try:
collection = s.split(".")[0]
function_call = s.split(".")[-1].strip("()")
print getattr(db[collection],function_call)()
3 Comments
wemadeit
The constraint is to use the string "users.count()" and convert that into db.users.count() i know that i can just use the command directly. I am programmatically generating commands so i need to be able to use variable strings to build up a command
wemadeit
i eventually used an ugly if elif elif elif chain but im hoping theres something better
wemadeit
hmm interesting wouldn't have thought to do this ha ill try it out!