cq | Query CSVs using SQL | SQL Database library
kandi X-RAY | cq Summary
kandi X-RAY | cq Summary
Wrapper over sqlite inspired by jq for querying CSVs using SQL.
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cq Examples and Code Snippets
Lines of Code : 30License : Permissive (MIT License)
Copydef dequeue(self) -> Any:
"""
Removes and retrieves the first element of the queue
>>> cq = CircularQueueLinkedList()
>>> cq.dequeue()
Traceback (most recent call last):
...
def dequeue(self):
"""
This function removes an element from the queue using on self.front value as an
index
>>> cq = CircularQueue(5)
>>> cq.dequeue()
Traceback (most recent call last def first(self) -> Any | None:
"""
Returns the first element of the queue
>>> cq = CircularQueueLinkedList()
>>> cq.first()
Traceback (most recent call last):
...
Excepti Community Discussions
Trending Discussions on cq
QUESTION
I have bidirectional streaming async grpc client that use ClientAsyncReaderWriter for communication with server. RPC code looks like:
...ANSWER
Answered 2021-Jun-11 at 12:54Can I try to read if it no data available?
Yep, and it's going to be case more often than not. Read() will do nothing until data is available, and only then put its passed tag into the completion queue. (see below for details)
Is it blocking call?
Nope. Read() and Write() return immediately. However, you can only have one of each in flight at any given moment. If you try to send a second one before the previous has completed, it (the second one) will fail.
What is the proper way to async reading?
Each time a Read() is done, start a new one. For that, you need to be able to tell when a Read() is done. This is where tags come in!
When you call Read(&msg, tag), or Write(request, tag),you are telling grpc to put tag in the completion queue associated with that responder once that operation has completed. grpc doesn't care what the tag is, it just hands it off.
So the general strategy you will want to go for is:
- As soon as you are ready to start receiving messages:
- call
responder->Read()once with some tag that you will recognize as a "read done".
- call
- Whenever
cq_.Next()gives you back that tag, andok == true:- consume the message
- Queue up a new
responder->Read()with that same tag.
Obviously, you'll also want to do something similar for your calls to Write().
But since you still want to be able to lookup the handler instance from a given tag, you'll need a way to pack a reference to the handler as well as information about which operation is being finished in a single tag.
Completion queuesLookup the handler instance from a given tag? Why?
The true raison d'être of completion queues is unfortunately not evident from the examples. They allow multiple asynchronous rpcs to share the same thread. Unless your application only ever makes a single rpc call, the handling thread should not be associated with a specific responder. Instead, that thread should be a general-purpose worker that dispatches events to the correct handler based on the content of the tag.
The official examples tend to do that by using pointer to the handler object as the tag. That works when there's a specific sequence of events to expect since you can easily predict what a handler is reacting to. You often can't do that with async bidirectional streams, since any given completion event could be a Read() or a Write() finishing.
Here's a general outline of what I personally consider to be a clean way to go about all that:
QUESTION
I am trying to build a docker image. This is the full dockerfile:
...ANSWER
Answered 2021-May-25 at 22:50I replicated this error with the continuumio/miniconda2:4.5.11 Docker image:
QUESTION
I followed the Sonos docs for adding app authentication and the page for using authentication tokens and the result is that the SMAPI server correctly returns an authToken together with a privateKey back to the controller. I can see the authToken being present in the credentials header inside the SOAP messages sent to my SMAPI server.
However, despite the many mentions of this inside the Sonos docs pages related to HTTP requests (I will list the resources links down below), the same authToken is not being sent inside the HTTP header Authorization, this making my CQ server unable to validate requester identity.
I tried the following, without success:
checking "Requires authorization header" capability in the customsd page of my Sonos device (I tried this because the docs page about capabilities precisely indicates that checking this "Sends OAuth token in the HTTP Authorization header.")
identifying some correlation between the "X-Sonos-" prefix HTTP headers used when the controller sends SOAP messages to my SMAPI server and the "X-Sonos-" prefix HTTP headers used when the device sends HTTP requests to my CQ server (eventually, I could not find any information that would identify the user based on this)
From Sonos device:X-Sonos-Playback-Id: RINCON_48??????D201400:3165321802 <= deviceId inserted after RINCON_
X-Sonos-Device-Id: Sonos_U????????????????????????6 <= householdId
X-Sonos-Corr-Id: 267e3e0c-75ca-4b9d-8be4-b8a795a462a3 <= unique each time
From macOS Controller:X-Sonos-Controller-ID: 68:??:??:??:??:07 <= the same each time
X-Sonos-Api-Key: 8??????e-7??7-4??f-b??6-7??????????0 <= the same each time
X-Sonos-Corr-Id: 648ec896-e043-44f8-bfba-cd0a80c9d857 <= unique each time
- checking both "Include SMAPI context headers with all requests" and "Include Zone Player IDs in credentials header" capabilities in the customsd page of my Sonos device (I tried this following the answer to this sonos tagged stackoverflow question Now that device ID is deprecated, is there another way to identify the client?)
The docs links I mentioned above that refer the presence of the auth token inside the HTTP Authorization header are the following:
the GET /context CQ API method page says to return 401 Unauthorized when "The access token has expired or is invalid."
the GET /itemWindows CQ API method page says "the player can use this API to obtain a new access token in the response from your cloud queue server" and "The request contains the access token in the authorization header" and "If the access token is set to expire soon, an updated one is included in the X-Updated-Authorization header of the response"
the POST /timePlayed CQ API method page says "The request header contains the access token in the authorization header" and that the method returns ERROR_SONOS_TOKEN_EXPIRED when "SMAPI OAuth token is expired, and user must re-authorize the account"
the GET /version CQ API method page says again that "The request contains the access token in the authorization header" and talks about a now deprecated updateToken parameter and also says that "If the access token is set to expire soon, you should include an updated token in the X-Updated-Authorization header."
But the most clear mention is in the page about HTTP requests, because it's not particular just for the CQ API endpoints but for all HTTP endpoints, even those hosted by the SMAPI server itself. The page reads the following 2 excerpts:
and
To conclude, with so many mentions of it in the official Sonos docs, why isn't this essential header being transmitted in the HTTP Authorization header? And how should a CQ verify the identity of the requester without the presence of this authToken on each API method request?
...ANSWER
Answered 2021-May-09 at 22:26If I follow you correctly, the token is passed in the header under loginToken, see https://developer.sonos.com/build/content-service-add-features/add-authentication/use-authentication-tokens/
This is not an http header, this is a section of the SOAP envelope. Like this:
QUESTION
I am using spring boot specification and trying to execute a query that looks like this -
...ANSWER
Answered 2021-May-20 at 00:23I believe you can not change that AND. could you change the query in the following way
QUESTION
I am using spring boot specification and trying to order a set of results by name such that names that start with "ca" come first. The query looks like -
...ANSWER
Answered 2021-May-18 at 08:07I don't know how to fix your Criteria code, but if you are open to using a named query via the @Query annotation in your JPA repository interface, then you may try ordering with a case expression:
QUESTION
I'm trying to get a list of property policy_type_id from ListAttribute, but I can't figure out how to do it.
I come up with an inefficient method was select whole Collection of PolicyType then filter it later
ANSWER
Answered 2021-May-15 at 14:35After long searching, I think that hibernate doesn't support query tuple of primitive types and list of objects (which is kinda sad, compare to LINQ to query). I decided to break down my query into smaller parts. First, I select tuples of article_id and ArticleVersion. After that, I select a list of PolicyType which also contains article_id, and union 2 lists back.
By the time I wrote this, I have an idea that I could select all 3 joins together and transform data the way I want. But It really depend on many aspects, like how many join or which type of join you're using, how fast data in each table grown (JOIN queries vs multiple queries)
QUESTION
I tried sum nested related column but get empty result.
Code:
...ANSWER
Answered 2021-May-15 at 09:16Try this query to get total products in each crop type:
SQL
QUESTION
Out of multiple columns present in Excel sheet, I need to check and find out the names of the specific columns for each rows from an excel sheet where the rows having NaN or blank, and enter the name of the column in an another column. If none of the column is having any blank OR NaN values it will be written as No Gaps.
Input Data:
...ANSWER
Answered 2021-May-14 at 06:19Idea is replace empty strings to missing values before testing them:
QUESTION
The script below takes one string input as a polyline and returns a data frame with the corresponding latitude/longitude pairs.
I would like to input to be a data set as follows:
ActivityID Polyline 1 PolyLineValue1 2 PolyLineValue2 3 PolyLineValue2and the output to be (keeping the ActivityID)
ActivityID latitude longitude 1 123 123 1 123 123 1 123 123 2 123 123 2 123 123 2 123 123 3 123 123 3 123 123 3 123 123I was thinking along the lines of iterating over the input dataset to do this but I've read here that's not a great idea performance wise.
Please can someone advice how to do this in Python?
...ANSWER
Answered 2021-May-10 at 12:23First, we wrap your code into a function:
QUESTION
I am trying this code but in whith where query does not work
any One can solve this problem?
ANSWER
Answered 2021-Apr-10 at 19:10You should use where(), then after that orWhere()
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