Tag: python

Using Functions rather than one liners Python

I am trying to use Python functions to perform data preprocessing. I want to have efficient code. I have like 8 files that I am reading to load them and do some sort of analysis. How would one achieve that using a function and the .head() to read all the CSV files? For instance instance I have loaded my data

Wrapping a C++ library using msl-loadlib in python

c++ ctypes python

I am currently writing a wrapper for a C++ library. The library is a 32-bits dll file and I’m using 64-bits so I’m using msl-loadlib. I have a problem wrapping a function that has pointer parameters. Here is the header of the function in C++ and here the wrapper I wrote When I call Client.getMeasu…

All possible combinations of arrays in python

arrays numpy python

I have a problem finding all combinations of a 2D array. Let’s suggest I have an array as follwoing: Now I need to get all possible combninations such as I’ve managed to get it with numpy and meshgrids with single arrays: But with a 2D array I cant’t get it to work. This doesn’t give m…

How to resolve error with None type of soup.find table?

beautifulsoup python selenium selenium-webdriver web-scraping

I try to get a table by using BeautifulSoap, and I faced error while using find method. I want to get headers of table from here: https://stooq.pl/t/?i=513&v=1&l=1 The id of a table i interested in is fth1, and HTML looks like that: My python script: I got the error: Traceback (most recent call last):…

What is the best way to detect memory leaks in a PyQt application?

memory-leaks pyqt python

I am developing a PyQt desktop application, on Linux, to be used in an industrial setting. It is basically a sensor data logger which displays real time graph and saves the data into a database. As it must run continuously 5 x 24 hours per week, I need to make sure there is no memory leak for it to run

Quarter end from today’s date

pandas python

I’m trying to get a quarter end date based on today’s date, but I wanted to strip the time first. If I do that, the below code throws me an error on the last line AttributeError: ‘datetime.datetime’ object has no attribute ‘to_period’ Could you advise me, how to improve it …

Populating an even distribution of values across multiple axis?

permutation python

Basic Example: Axis Value Counts: Where the axis all have an equal distribution of values My attempt thus far: Output: So, I have the conditions I need on one axis, but not on the other. How can I update my method/create a method to meet both conditions? Answer You can tile you input and use a custom roll to …

Coloring in matplotlib scatter plot does not obey the predefined color sequence of my ListedColormap(cmap)

labeling matplotlib python

I have an issue when I am trying to use predefined color sequence for the labels of my data. In detail, I am using the parameter c of scatter plot for the labels of my data, and then cmap=ListedColormap(km_colors) for coloring them according to my colors list. However, it looks like the colormap decides for i…

python substrn cells in a column dataframe

find python substr

I have this data frame with this kind of column: I need to clean this up and leave from “DCG_” up to where “</div>” begins: Most of the cells in this column vary where the “DCG_” is located as well as the “</div>”, I’m trying to use the followi…