c-api | Bitcoin full node as a C Programming Language library | Blockchain library

I am trying to install factoextra, but I gets stuck during the CMake part, in particular with error like:

CMake Error: The source directory "/tmp/..." does not exist.

(same when I try to install its dependencies: nloptr, pbkrtest, lme4, car, rstatix, FactoMineR, ggpubr )

any idea?

thanks

ps:

• R version 4.0.0
• centos 7

last part of logs:

Suppose that I have implemented two Python types using the C extension API and that the types are identical (same data layouts/C struct) with the exception of their names and a few methods. Assuming that all methods respect the data layout, can you safely change the type of an object from one of these types into the other in a C function?

Notably, as of Python 3.9, there appears to be a function Py_SET_TYPE, but the documentation is not clear as to whether/when this is safe to do. I'm interested in knowing both how to use this function safely and whether types can be safely changed prior to version 3.9.

I'm writing a Python C extension to implement a Persistent Hash Array Mapped Trie (PHAMT); in case it's useful, the source code is here (as of writing, it is at this commit). A feature I would like to add is the ability to create a Transient Hash Array Mapped Trie (THAMT) from a PHAMT. THAMTs can be created from PHAMTs in O(1) time and can be mutated in-place efficiently. Critically, THAMTs have the exact same underlying C data-structure as PHAMTs—the only real difference between a PHAMT and a THAMT is a few methods encapsulated by their Python types. This common structure allows one to very efficiently turn a THAMT back into a PHAMT once one has finished performing a set of edits. (This pattern typically reduces the number of memory allocations when performing a large number of updates to a PHAMT).

A very convenient way to implement the conversion from THAMT to PHAMT would be to simply change the type pointers of the THAMT objects from the THAMT type to the PHAMT type. I am confident that I can write code that safely navigates this change, but I can imagine that doing so might, for example, break the Python garbage collector.

(To be clear: the motivation is just context as to how the question arose. I'm not looking for help implementing the structures described in the Motivation, I'm looking for an answer to the Question, above.)

I'm trying to install the "lme4" library in R and RStudio, which worked before I was on an M1 Mac, but now it's not installing. The dependency that's having trouble is: "nloptr". Here's my current error:

I am building a Python C Extension that can load images. To load a certain image, the user has to write the file path for that image.

The problem is that the user has to type the whole file path, even if the image is in the same directory as their module.

Python itself has some useful tools like os.path and pathlib that can help you to find the path of the current module. I have searched the Python C API and I cannot seem to find any tools that relate to finding the current working directory in C.

What can I do - in C - to get the path to the directory of the user's module? Are there any Python.h functions? Am I taking the wrong approach?

I have a type (specifically CFData from core-foundation), whose memory is managed by C APIs and that I need to pass and receive from C functions as a *c_void. For simplicity, consider the following struct:

I'm writing some code for a class project that sends jobs to a dataproc cluster in GCP. I recently ran into an odd error and I'm having trouble wrapping my head around it. The error is as follows:

I have an API that recently started receiving more traffic, about 1.5x. That also lead to a doubling in the latency:

This surprised me since I had setup autoscaling of both nodes and pods as well as GKE internal loadbalancing.

My external API passes the request to an internal server which uses a lot of CPU. And looking at my VM instances it seems like all of the traffic got sent to one of my two VM instances (a.k.a. Kubernetes nodes):

With loadbalancing I would have expected the CPU usage to be more evenly divided between the nodes.

Looking at my deployment there is one pod on the first node:

And two pods on the second node:

My service config:

After following huawei setup docs https://developer.huawei.com/consumer/en/doc/development/HMS-Plugin-Guides-V1/preparedevenv-0000001050032222-V1, maps still not render on our apps.. It just showing blank screen without any error show, on both emulator and real device

How to make it work? For your info, I already did:

• Enable map kit api
• Added agconnect-services.json inside my android/app

From logcat

Trying to use this service to fetch JSON data for further processing locally:

https://www.sec.gov/edgar/sec-api-documentation

Example for testing (from documentation link above):

https://data.sec.gov/api/xbrl/frames/us-gaap/AccountsPayableCurrent/USD/CY2019Q1I.json

Which works great in the browser, however I have tried several methods (listed below) all fail primarily with Protocol Error / 404

Per documentation https://www.sec.gov/os/webmaster-faq#developers

I have incorporated the required header entries (I think correctly)

I keep reading that the preferred method is to use HttpClient, however all the simple examples I encountered are C# and/or use lambda expression which I don't understand. I attempted to translate to VB as best I can - Not sure if I got it right.

I have also added this to the App.config: