I just implemented a Linux command shell in python using only the os library’s low level system calls, like fork() and so on. I was wondering how I can implement a key listener that will listen for key (UP|DOWN) to scroll through the history of my shell. I want do do this without using any fancy librari…
Tag: python
VS code not loading Python Interpreter
Here is my VS code infor: My python path is here: But VS codes keeps saying Select Python Interpreter in the status bar even after I selected. But when I try to select, it says it is already being selected. At moment, due to this, I am unable to use Python linter Flake8. When I check the console log. I
how to split a long text file at a particular symbols and pasting the splitted files side by side
Hii experts i want to split a large column of text file at a particular symbol(here >) and want to paste the splitted file side by side as given in a example below: I tried with split -l 4 inputfile > otputfile but it doesnot help.I hope some expert will definitely help me. For example i have data as gi…
i cant install pyaudio, a weird error is showing up?
i used command pip3 install pyaudio,this error shows up btw, im using ubuntu 20.04 i was using speech recogniser module in python but this error shows up and im using visual studio code any thoughts? any answers? Answer There are a few more dependencies which have to be manually installed before using python&…
Cannot bind NumPad minus key on Linux with Tkinter
I encountered an issue regarding KeyPress binds in tkinter when switching between Windows and Linux while using a NumPad. Using self.bind(“-“, function) works on Windows, however is not triggered on Linux. With the following code snippet I found out that the events of a keyboard-minus differs from…
May I use a root user to expose the python bottle application to the Internet?
I made a WEB application using Bottle and want to publish it. I decided to use paste for the web server because official document said it’s the easiest way. In order to let the web server process listen on the port 80, the process must be launched by the root user. I’m not a security expert and ca…
ValueError: operands could not be broadcast together with shapes (720,1280) (720,1281)
I tried to use the following program to extract slides from a video of a powerpoint: However, when I run it I get the following error: Please guide me how I can solve it. Answer Integer division will round down rather than rounding towards zero. If you replace: with: this should solve it. Parentheses shown fo…
how to flip columns in reverse order using shell scripting/python
Dear experts i have a small problem where i just want to reverse the columns.For example i have a data sets arranged in 4 columns i need to put last column first, and so on reversely…how can this work be done…i hope some expert will definitely answer my questions.Thanks in put data example i need …
Pipe between a C and a Python program
I am currently trying to write a C program that interacts with hardware, I have chosen so since the manufacturer of the hardware supplies with a C SDK for this hardware. However, I want this C program to output the data it receives from the hardware (a sensor for example) to a pipe so that I can write a Pytho…
Why is subprocess ignoring PATH, and how can I change this?
I need to change which program is called by a Python application. Unfortunately I cannot change the Python code. I can only change the calling environment (in particular, PATH). But unfortunately Python’s subprocess module seems to ignore PATH (at least under certain circumstances). How can I force Python to …