I’d like to create a decision tree in python with a different split criterion than information gain, something like “1-information gain” (something like the opposite of impurity measure, like as similarity measure). Does already exist something like this? paper included. Thanks Answer Yes, i…
Tag: python
sklearn roc_auc_score with multi_class==”ovr” should have None average available
I’m trying to compute the AUC score for a multiclass problem using the sklearn’s roc_auc_score() function. I have prediction matrix of shape [n_samples,n_classes] and a ground truth vector of shape [n_samples], named np_pred and np_label respectively. What I’m trying to achieve is the set of…
Seaborn expands X axis dates back to year 2000
I have a pandas dataframe that contains dates starting at 2017-09-01 (which I believe is in the correct format for a dataframe date). But the X axis is expanded dramatically. I do not have any outliers on the LHS. Answer Pandas and matplotlib’s dates sometimes don’t go along well. You can set the …
What does = (equal) do in f-strings inside the expression curly brackets?
The usage of {} in Python f-strings is well known to execute pieces of code and give the result in string format (some tutorials here). However, what does the ‘=’ at the end of the expression mean? Answer This is actually a brand-new feature as of Python 3.8. Added an = specifier to f-strings. An …
How to de-skew a text image and retrieve the new bounding box of that image Python OpenCV?
Here’s a receipt image that I’ve got and I’ve plotted it using matplotlib and If you see the image the text in it is not straight. How can I de-skew and fix it? I think if we want to de-skew first we have to find the edges, so I tried to find the edges using canny algorithm and then get
How do I pass variables to scss processor?
My current set up is Front-end: VueJS Backend Python, Tornado Vue is used using the cdn for indivudual static templates. Tornado serves the templates. I’m using the python scss library to compile the scss, that part of pretty straight forward. I have two config.py files that hold configurations with two…
How to scrape dataframe after select options from dropdown list?
I want to scrape dataframe from dropdow value with BeautifulSoup. I select the value in both dropdown I submit my selection I get a data table I would like to catch this dataframe with BS. any idea of the process to achieve this? example site: https://coinarbitragebot.com/arbitrage.php thanks Answer You can i…
Missing module tensorflow on iPython azure machine learning (Classic)
Yesterday I have install tensorflow module from iPython notebook from Azure machine learning studio (classic) version. The import worked well after installing the module using (!pip install tensorflow). But today when tried to import this module got this “missing module” error and when I tried rei…
Matplotlib: changing the alpha of plotted image with AnnotationBox artist
This question is into relation with the following answer: https://stackoverflow.com/a/53851017/8814577 I’ve used the in the answer described method to drop images in a boxplot with AnnotionBox (from matplotlib.offsetbox) and it worked out great. However I’ve been searching but did not find an obvi…
How do I pass an async function to a thread target in Python?
I have the following code: and I need to give it to a Thread as a target: The error that I get is “some_callback is never awaited”. Any ideas how can I solve this problem? Answer You can do it by adding function between to execute async: