Python

mplFinance edit x-axis to show seconds

I am wondering if there is a way to have an MPLFinance plot show more keys(time) and seconds as well as minutes. I know you are able to add the minute, but can’t find anywhere to add the seconds. Answer You can tell mpf.plot() how you want to format the datetime axis using kwarg datetime_format=. You ca…

Check if value in pandas dataframe is within any two values of two other columns in another dataframe

dataframe pandas python vectorization

I have two dataframes of different length. dfSamples (63012375 rows) and dfFixations (200000 rows). I would like to check each value in dfSamples if it is within any two ranges given in dfFixations and then assign a label to this value. I have found this: Check if value in a dataframe is between two values in…

Convert Text File into Pandas Dataframe

pandas python text

I want to create a dataframe from a textfile. I scraped some data from a website and wrote it into a .txt file. There are 10 ‘columns’, as shown in the first 10 lines of the text file. Can anyone help me with seperating the lines into the respective columns in a pandas dataframe format? Much appre…

How SharedMemory in python define the size?

multiprocessing operating-system python

I have some prolem about SharedMemory in python3.8,any help will be good. Question 1. SharedMemory has one parameter SIZE,the doc tell me the unit is byte.I created a instance of 1 byte size,then, let shm.buf=bytearray[1,2,3,4], it can work and no any exception!why? Question 2. why print buffer is a memory ad…

deserialize json with objects

json python

In python 3, how can I deserialize an object structure from json? Example json: Here’s my python code: How to force some_object to be of type B and some_list_of_objects to be of type list of C? Answer As you’re using Python 3, I would suggest using dataclasses to model your classes. This should im…

PyQt5 window comes up empty

pyqt5 python

I’m trying to build a simple PyQt5 application . I have so far created a couple of widgets and have added them to my layout . Unfortunately my Window is not showing the lables or the pushbutton which I have created . Answer The problem is caused because the layout associated with the widgets is not asso…

Syntax error calling Python from C with fork-execv

c++ exec linux python python-3.x

I want to call a Python script as a child process from a C program using fork and execv. I have tested it calling bin/ls and it works: So I changed the C code to call the Create_Buffer() function in this Python file: The Python script has two functions; I want to call Create_Buffer(), so I changed my C file

Zipping two np.array into array

arrays numpy python

Im trying to combine following two np.arrays into a single array: The combination array must look like this [[i, pred, boxes],…]: I tried doing it this way, but it unfortunately didn’t work: Is there a way to do this? I tried other means but those tries were even worse. Answer Try hstack: