P Color LaserJet Pro MFP M176n scanner doesn't work on Ubuntu 20.04
How should I install HPLIP binary/proprietary plugin/driver for my HP printer or printer+scanner?
In Python, how do I get a function name as a string, without calling the function?  def my_function():     pass  print get_function_name_as_string(my_function) # my_function is not in quotes   should output "my_function".  Is such function available in Python? If not, any ideas on how to implement get_function_name_as_string, in Python? I have parent folder "parent". Inside this folder I have subfolders, and a file named "names.txt". this file includes the names of these subfolders as follow:  Parent_folder folder1 folder2 folder3 folder4 . . . . names.txt   The content of the file "names.txt" is as follow:  folder1 folder2 folder3 folder4 . . .   Inside every folder I have images and I want to apply consecutively 10 scripts on every image ( every script must finish it is job inside every folder, then the second script must be run). These scripts have different names and they are exist in one folder. I set an environment by sourcing a file then I can call these scripts by its name from terminal .At the same time I want to apply this process on all the folders at once. i.e. when script #1 is running, I want it to be running on all the folders at the same time. When it is done and script #2 will start. I want it to start in all the folders at once and so on... In order to achieve this I wrote the following code:  #!/bin/bash path=PATH/TO/THE/PARENT/FOLDER for i in $(cat $path/names.txt); do { script#1 } &amp; { script#2 } &amp; . . .  done   This code is not working efficiently as all the commands are running at once. I want the commands to run on all the folders at once but consecutively.  What I am doing wrong? How to mix three different shaders on the same material? So I came across some difficulties with the &quot;Mix shader&quot; node in cycles. I have 3 textures on a label: gold, paper and rough black letters.  How can I mix these effects? I can make 2 textures work together, but not the 3rd one. Here's the node graph.  Here's the reference. How do I remove diacritics (accents) from a string in .NET? I'm trying to convert some strings that are in French Canadian and basically, I'd like to be able to take out the French accent marks in the letters while keeping the letter. (E.g. convert é to e, so crème brûlée would become creme brulee)  What is the best method for achieving this? Set limit to one author when using "et al." in biblatex How do you compile OpenSSL for x64? After following the instructions in INSTALL.W64 I have two problems:   The code is still written to the "out32" folder. I need to be able to link to both 32-bit and 64-bit versions of the library on my workstation, so I don't want the 64-bit versions to clobber the 32-bit libs. The output is still 32-bit! This means that I get "unresolved external symbol" errors when trying to link to the libraries from an x64 app. Possible Duplicate:          I am always confused with the prepositions to use when indicating an event happening at a place. Should I use "at" or "in" or "on"?  For example:     We had our dinner at the McDonalds at/in the shopping centre at/on Sixth   Avenue.   The McDonalds restaurant is in the shopping centre. The shopping centre is located at Sixth Avenue. So am I right to say "the McDonalds in the shopping centre at Sixth Avenue"?  Now, what if it was a street instead of an avenue? Say for example:     We had our dinner at the McDonalds at/in the shopping centre at/on Coral Street.   Here, somehow, I find it natural to say "the McDonalds at the shopping centre on Coral Street".  How do I determine the right prepositions to use? And how would the different prepositions give different meanings to the sentence? Dynamically Determine Calling Context? We have various ways of invoking apex. Triggers, Inbound Webservices, @InvocableMethod,@RemoteAction and what not. Often we call some or other utility methods from these execution contexts. I have some generic utility method,that should behave differently from the context it is called?  I know about Trigger.isExecuting but it only tells if its running in trigger context or not.  I have a utility method that creates lead from Webservices, VF button click and via Lightning . Whenever we create a lead I want some special operations to be done via the source it was originated.(Its not just updating a simple field leadSource, I have some methods that creates some childs and update other records of other type) . I can achieve this by passing an extra parameter to utility method to tell about source, but i have then to edit hundred of other class that uses this utility method. If i could dynamically find out via which context this piece of code is running,then i would have to change only one class to satisfy my requirement.    Is there something in APEX that tells in what context the apex method was called? Find all entire functions $f(z)$ such that $|f(z)|=1$ for $|z|=1$  Hint: First show that $f(z)$ is a polynomial.  Clearly one can not use Cauchy Estimates to prove that $f(z)$ is a polynomial, the other way is to prove that $f(z)$ has a pole at infinity which I am not sure how to prove that, are there any other ways to prove that a given entire function is a polynomial ?  Thank you ! What is the function __construct used for? I have been noticing __construct a lot with classes. I did a little reading and surfing the web, but I couldn't find an explanation I could understand. I am just beginning with OOP.  I was wondering if someone could give me a general idea of what it is, and then a simple example of how it is used with PHP? How much energy does a photon need to form a black hole? I was wondering if it is possible for a single photon to form a black hole if it has a small enough wavelength.If so, what would this wavelength be? I came across this question because I am reading about loop quantum gravity, and have heard that it is 'untestable'. I know that the loops making up spacetime in loop quantum gravity are thought to have a size in the order of $10^{-35}$m, and I was wondering whether making a photon with a wavelength small enough to investigate this would form a black hole.  I am aware of the two posts here, but neither seem to really answer my question because they refer to several photons:  and .  Thank you. What are these dark spots in my pictures? I've been seeing these dark spots in my pictures. They appear a lot more on some pictures than others, but they are in the same place in the image and independent of the lens being used. Is this dust? I've also heard that you can get oil spots on the sensor.  The image is from a Nikon D7000. Transform the NFSA with transition table Transform the NFSA with transition table  $$\begin{array}{ccc} X&amp;a&amp;b\\ A&amp;\{\}&amp;\{F\}\\ B&amp;\{\}&amp;\{\}\\ F&amp;\{\}&amp;\{A,S\}\\ S&amp;\{F\}&amp;\{A,F\} \end{array}$$  and starting state $S$ inta a DFSA and give the transition table of that DFSA. Place the letter $X$ (uppercase) in the top left corner of the matrix. Your states in the first column and inputs in the first row can be in the order of your choice.  The question then offers a $7\times 3$ matrix to be filled in.  Unsure how to transform the NFSA with transition table.  This is my answer but it is incorrect.  $$\begin{array}{ccc} X&amp;a&amp;b\\ \{S\}&amp;\{F\}&amp;\{A,F\}\\ \{F\}&amp;\{\}&amp;\{A,S\}\\ \{A\}&amp;\{\}&amp;\{F\}\\ \{A,F\}&amp;\{\}&amp;\{A,F,S\}\\ \{A,S\}&amp;\{F\}&amp;\{A,F\}\\ \{A,F,S\}&amp;\{F\}&amp;\{A,F,S\} \end{array}$$ I use the listings package for code listings and I turned the line numbers on. But they appear left of the paragraph. I want them inside the paragraph. In the documentation it looks just right. Here is my code:  \documentclass[12pt,a4paper]{scrartcl} \usepackage{listings} \lstset{numbers=left} \begin{document} \section{Test} Test \begin{lstlisting}     test() \end{lstlisting} \end{document} This error occurs whenever I try to work with sudo. I changed the permissions of /var/ folder to 777 and I think this causes the error. Please help me get back a functional sudo and /var. How can I execute an equivalent of `head -z` when I don't have the `-z` option available? Blender 2.8 - How to access material nodes? Is time travel possible? Is it possible to go back in time? I read somewhere that according to relativity, it is possible - involving black holes and other stuff - to jump into the past. Is it possible for anything to go back in time either continuously or by jumping? Preimage of codimension one subspace of the quotient $g/D^1 g$ I am trying to prove the following.  Proposition Let $g$ be a Lie algebra such that the first derived algebra $Dg$ is a proper ideal of $g$. Consider the quotient $g/D^1 g$, and show that the preimage of any codimension 1 subspace is   an ideal, and has codimension 1.   I could show that the preimage is indeed an ideal, but I need some help with the part about the dimensions:  So suppose that $\phi: x \mapsto [x]$ is the quotient projection. And write $[h] + Dg$  for a codimension 1 subspace of $g$ (here $h\subset g$). Then the preimage of this subspace is just the linear span $h+Dg\leq g$. Let $y+z \in h+Dg$ with $y\in h$ and $z\in Dg$. Let $x\in g$. We want to show that $[x, y+z]\in h$, ie that $h + Dg \lhd g$. We can write $x$ as $x_0+x_1$ for $x_0 \in Dg$, $x_1\not\in Dg$. Then  $$[x,y+z] = [x_0, y+z] + [x_1, y] + [x_1,z] \in h + Dg$$  The inclusion follows since $Dg$ is an ideal so the first and third terms belong $Dg$; and $[x_1, y] \in D_g$, as $g/Dg$ is abelian. Can somebody please explain when parent process receives the exit status of a dead child process via wait, who actually reallocates the memory of the child process and removes it from the process table?