I wrote a RPC server foo in Python that I deamonized with Everything works fine except that every use of subprocess.check_call(some_cmd) or os.popen(some_cmd).read(1048576) in my daemon returns an empty string compared to the case when I start foo in the foreground. The external program some_cmd is still exec…
Tag: python
Command Line: Python program says “Killed”
I’m extracting xml data from 465 webpages ,and parsing and storing it in “.csv” file using python dataframe. After running the program for 30 mins, the program saves “200.csv” files and kills itself. The command line execution says “Killed”. But when I run the program…
How do I create a file I can stream data to in Python?
I’d like to create a file similar to those under /dev that I can stream lines of text to without actually writing anything to the disk. I want to still be able to read this stream like a regular text file. Answer Call the os.mkfifo function, then open the file it creates as normal. Anything that gets wr…
A function that can be stored on memory
suppose we have two python programs. calculate.py and show_results.py. When calculate.py program runs on terminal, it returns a variable (let’s say a list called result) to the computer memory. And when we run show_results.py on terminal, it prints the result from the programs before. Suppose the result…
Are resource demanding process divided into multiple processes?
It is spotted on google cloud engine. Multiple instances of my script are created (by bash?). The reason might be that the script demands very high amount of memory. How is this division done exactly? Any performance impact? [UPDATE] My mistake. These instances are threads created by python. Answer Don’…
Linux Terminal executing Python Script differently to Idle
So I wrote a program to print songs like an old dot matrix printer, character by character. When I run the thing in Idle it does it and works fine, but when I call the program from the Linux Terminal the text is printed line by line, instead of character by character, and it really takes away from the whole
Why does this code work on Linux but not on Windows?
I asked a previous question here, regarding flagging Daylight Saving Time hours. @MattMessersmith kindly and expertly answered my question, and his solution worked perfectly in Linux (Ubuntu), but not on either of my Windows machines (work and home). My Windows machines are both running Anaconda with Python 3…
Create files in subdirectories with the same name [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 4 years ago. Improve this question Reading a list with A and B data in 2 columns, iterating row by row, I was createding a seri…
Could not run Ec2-server on port 80
I could run the server on port 8000 but when i try to use 80 with python manage.py runserver myip:80 I get: You don’t have permission to access that port. If I use sudo python manage.py runserver myip:80 I get: If I write python in the console I get version 3.5.5 and my env is activated. EDIT: Using sud…
Why is SIGALARM killing the Python program on Linux?
This programs prints Alive four times on stdout and then dies. While I am not handling the SIGALARM signal explicitly inside the program, I just expect the alarm to get ignored. However, on Linux, the script dies after the alarm is triggered. I have not been able to find any documentation for Linux which stat…