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I need to mutex several processes running python on a linux host.

They processes are not spawned in a way I control (to be clear, they are my code), so i cannot use multithreading.Lock, at least as I understand it. The resource being synchronized is a series of reads/writes to two separate internal services, which are old, stateful, not designed for concurrent/transactional access, and out of scope to modify.

a couple approaches I'm familiar with but rejected so far:

• In native code using shmget / pthread_mutex_lock (eg create a pthread mutex by well-known string name, in shared memory provided by the OS). Im hoping to not have to use/add a ctypes wrapper for this (or ideally have any low-level constructs visible at all here for this high-level app).
• Using one of the lock file libraries such as fasteners would work - but requiring any particular file system access is awkward (the library/approach could use it robustly under the hood, but ideally my client code is abstracted from that).

Is there a preferred way to accomplish this in python (under linux; bonus points for cross-platform)?

I'm trying to install MarkupSafe for python 3.5 on Ubuntu 16.04 Running in Docker. Running pip3 install markupsafe==2.0.1 gives

I was trying to solve a simple optimization problem, first via Python.Cvxpy framework and then via Julia.JuMP framework, but Julia.JuMP formulation is 15x slower.

My optimization problem:

1. In Python.Cvxpy: (runtime: 4 sec)

I have a 3 deep array. Currently, the code will isolate a record based on one field ($profcode) and show the heading. Eventually, I am going to build a table showing the information from all the other fields. The code so far is using in_array and a function that accepts $profcode. I am unsure if (and how) I need to use array_keys() to do the next part when I retrieve the "Skills" field. I tried:

I have a small problem, when trying to combine columns using paste, I combine the first column and the last result of the for loop. Tell me how to combine all the results of the for loop, and not just the last one?

Here is our document schema

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My code:

I am a novice Rcpp user. I want to fasten my for loop which uses several entities from r environment, and updates two vectors through iterations. The problem is that this is my first time facing c or c++ so I do not understand how to write rcpp with inline packages. Here is the reproducible loop that I want to rewrite.

so am working with puppeteer to automate stuffs and it working fine, but when i load the website it take a bit more time to load than my normal website, i tried doing cache using this