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On August 09 2015 22:56 Sufficiency wrote:
Suppose there is an existing program that runs on the command line and gives one line of output every second. I want to write a Python script which intercepts the output from the first program line by line, analyze/modify it, then output something slightly different. How should I approach this problem? I only need this to work on Linux.
You write a program that reads from standard input and writes to standard output. You then use your shell to pipe the output from the first program into the input of your program.
EDIT:
I was wondering what you were doing with xargs, and I think I now get it: you want to run your program for each line of output from the first program. Your program expects its input on the command line.
You can make bash take the first program's output and split it into lines and run your program with each of those lines as parameters like this:
while read foo; do yourPythonProgram $foo; done < <( firstprogram )
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On August 10 2015 01:49 Ropid wrote:Show nested quote +On August 09 2015 22:56 Sufficiency wrote:
Suppose there is an existing program that runs on the command line and gives one line of output every second. I want to write a Python script which intercepts the output from the first program line by line, analyze/modify it, then output something slightly different. How should I approach this problem? I only need this to work on Linux.
You write a program that reads from standard input and writes to standard output. You then use your shell to pipe the output from the first program into the input of your program. EDIT:I was wondering what you were doing with xargs, and I think I now get it: you want to run your program for each line of output from the first program. Your program expects its input on the command line.
You can make bash take the first program's output and split it into lines and run your program with each of those lines as parameters like this: while read foo; do yourPythonProgram $foo; done < <( firstprogram )
Yes that's my current plan. Not sure if it is the way to go.
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On August 10 2015 04:35 Sufficiency wrote:Show nested quote +On August 10 2015 01:49 Ropid wrote:On August 09 2015 22:56 Sufficiency wrote:
Suppose there is an existing program that runs on the command line and gives one line of output every second. I want to write a Python script which intercepts the output from the first program line by line, analyze/modify it, then output something slightly different. How should I approach this problem? I only need this to work on Linux.
You write a program that reads from standard input and writes to standard output. You then use your shell to pipe the output from the first program into the input of your program. EDIT:I was wondering what you were doing with xargs, and I think I now get it: you want to run your program for each line of output from the first program. Your program expects its input on the command line.
You can make bash take the first program's output and split it into lines and run your program with each of those lines as parameters like this: while read foo; do yourPythonProgram $foo; done < <( firstprogram ) Yes that's my current plan. Not sure if it is the way to go.
Write it the traditional way where it reads from stdin and writes to stdout. Using it is then "firstprogram | yourprogram". That type of program, you can still use for single lines if you ever want and need to, so it has no downsides.
In practice, you write a program that reads from a file, line by line, prints to the terminal after each line is read, and it all continues until the end of the file is hit. There's nothing special you have to do compared to working with a normal file.
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Didn't I already provide an answer to that problem on the previous page?
You could simply approach this problem from a different direction. Use os.popen to launch your existing program inside of the python script. Your script then has access to all input, output and errors of the program and you can handle that however you like. The best thing is that you're not doubling-up on output since all the end user gets is the output of your script.
Instead of doing stuff like using linux pipes and xargs to execute the program and then your script you simply launch your script (which will launch the program for you and parse its output). Much less hassle, reduced complexity and everything is way more contained.
Here's the link again: https://docs.python.org/2/library/subprocess.html
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On August 10 2015 06:27 Manit0u wrote:Didn't I already provide an answer to that problem on the previous page? You could simply approach this problem from a different direction. Use os.popen to launch your existing program inside of the python script. Your script then has access to all input, output and errors of the program and you can handle that however you like. The best thing is that you're not doubling-up on output since all the end user gets is the output of your script. Instead of doing stuff like using linux pipes and xargs to execute the program and then your script you simply launch your script (which will launch the program for you and parse its output). Much less hassle, reduced complexity and everything is way more contained. Here's the link again: https://docs.python.org/2/library/subprocess.html
To be honest I was looking at that link from the previous page but I wasn't 100% sure what that would achieve. Thank you for elaborating on it.
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@Manit0u thanks, I was doing something like the first example for my views (passing a $data array containing my data and then looping through and echoing the contents with HTML mixed in as necessary).
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On August 10 2015 11:24 Sufficiency wrote:Show nested quote +On August 10 2015 06:27 Manit0u wrote:Didn't I already provide an answer to that problem on the previous page? You could simply approach this problem from a different direction. Use os.popen to launch your existing program inside of the python script. Your script then has access to all input, output and errors of the program and you can handle that however you like. The best thing is that you're not doubling-up on output since all the end user gets is the output of your script. Instead of doing stuff like using linux pipes and xargs to execute the program and then your script you simply launch your script (which will launch the program for you and parse its output). Much less hassle, reduced complexity and everything is way more contained. Here's the link again: https://docs.python.org/2/library/subprocess.html To be honest I was looking at that link from the previous page but I wasn't 100% sure what that would achieve. Thank you for elaborating on it.
No problem. Hope that's of any help to you.
On August 10 2015 15:04 Birdie wrote:
@Manit0u thanks, I was doing something like the first example for my views (passing a $data array containing my data and then looping through and echoing the contents with HTML mixed in as necessary).
Well, as long as you don't construct HTML in the controller it's all fine.
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I have almost one year work experience as a software engineer, and because I'm still young, I'm wondering if I should go for a masters degree at some point. By the time I save up enough for masters study in the UK (I already have BSc in the UK), I'll have had about 3 years work experience, so is it worth it then? My family values higher education, and if I go for masters, I'll do it only because of 1) higher salary/better CV and 2) prestige, but the 1st is more important for me. I don't like theoretical thesis though. 
Edit: I'm using C#, C++, WCF and WPF if it matters. I also know Java.
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did you check job offers in your area?
In germany noone seeks to give a damn as long as its some form of post highschool degree, i have seen like 2 offers that were restricted to a Masters.
99% of the offers required a bachelors and didnt even differentiate between the more academic universities and the slightly less academic "Fachhochschulen", who are a bit more focused on practical things.
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I honestly depends on what you want to do. If you are happy with jobs like your current one you won't need it. A few jobs will require a higher degree, but we don't know where your interests lie. As LaNague wrote - look at various job offers.
Can you do your degree part-time? It's what I did - my 2 years master could take as long as 4 years (I needed 3, since I didn't do a normal 50:50 split).
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On August 14 2015 16:44 Zocat wrote:
I honestly depends on what you want to do. If you are happy with jobs like your current one you won't need it. A few jobs will require a higher degree, but we don't know where your interests lie. As LaNague wrote - look at various job offers.
Can you do your degree part-time? It's what I did - my 2 years master could take as long as 4 years (I needed 3, since I didn't do a normal 50:50 split).
Well, as long as I work with C#/C++ and OOP in general, I'm happy. Software engineering is definitely my preferred area, and I'd not trade it for more science. So the question is: does masters degree increase salary a lot or is it just a CV requirement for some jobs?
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in germany it doesnt increase salary, it opens a few positions with more academic activities where you really need the knowledge.
i can only speak about germany and our system.
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On August 15 2015 06:28 darkness wrote:Show nested quote +On August 14 2015 16:44 Zocat wrote:
I honestly depends on what you want to do. If you are happy with jobs like your current one you won't need it. A few jobs will require a higher degree, but we don't know where your interests lie. As LaNague wrote - look at various job offers.
Can you do your degree part-time? It's what I did - my 2 years master could take as long as 4 years (I needed 3, since I didn't do a normal 50:50 split). Well, as long as I work with C#/C++ and OOP in general, I'm happy. Software engineering is definitely my preferred area, and I'd not trade it for more science. So the question is: does masters degree increase salary a lot or is it just a CV requirement for some jobs?
I think it's a safe bet that two years of salary and the added senority will out-earn having a masters. Do it if you want to immerse yourself in some particular subject, or if you want to get into research. Don't do it for money.
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omg, Uboot is a mess...
There are special cases to detect operating systems that aren't Linux. Uboot proceeds to try to boot each one per it's own preferences while forgetting to set the device tree in every case but Linux. So now, every operating system that isn't Linux tells Uboot that it IS Linux so that Uboot will pass it the device tree. Of course, this means every non-Linux operating system then has to work around all the other Linux booting cruft Uboot does.
It's a farce.
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Im writing a little opengl mini platformer from scracth.
But I can't decided if I will do it in plain C or fully oop in c++.
My main concern with doing it in C is how to handle the logic, and every solution I come up with is pretty much writing something that handles function pointers for me. That is something that feels very wierd for me to write that when I can just pick c++.
Advise is welcome.
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On August 16 2015 03:20 sabas123 wrote:
Im writing a little opengl mini platformer from scracth.
But I can't decided if I will do it in plain C or fully oop in c++.
My main concern with doing it in C is how to handle the logic, and every solution I come up with is pretty much writing something that handles function pointers for me. That is something that feels very wierd for me to write that when I can just pick c++.
Advise is welcome.
Pick C++, it is much safer than C. C++11 is also quite nice and can help a lot.  You already have access to smart pointers and std::function which is a better function pointer. std::thread is also nice.
Edit: Also templates although I'm still not good at that.
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how about C++ but not fully OOP* ?
*for typical definitions of fully OOP
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On August 16 2015 03:34 darkness wrote:Show nested quote +On August 16 2015 03:20 sabas123 wrote:
Im writing a little opengl mini platformer from scracth.
But I can't decided if I will do it in plain C or fully oop in c++.
My main concern with doing it in C is how to handle the logic, and every solution I come up with is pretty much writing something that handles function pointers for me. That is something that feels very wierd for me to write that when I can just pick c++.
Advise is welcome. Pick C++, it is much safer than C. C++11 is also quite nice and can help a lot. You already have access to smart pointers and std::function which is a better function pointer. std::thread is also nice. Edit: Also templates although I'm still not good at that.
I haven't worked with templates but use generics (soft of like templates from what I understand) everyday, its super usefull.
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EPT
