I have a task where I have tiled an Input image using the code: After that I calculated the sum of all tiles and sort them in ascending order. I’ll take the sum.sorted[-20] as a threshold and set all tiles below that threshold to 0 in order to neglect background. So far everything works fine. Now I need…
Tag: python
AttributeError: ‘PandasExprVisitor’ object has no attribute ‘visit_Ellipsis’, using pandas eval
I have a series of the form: Note that its elements are strings: I’m trying to use pd.eval to parse this string into a column of lists. This works for this sample data. However, on much larger data (order of 10K), this fails miserably! What am I missing here? Is there something wrong with the function o…
How to train Naive Bayes Classifier for n-gram (movie_reviews)
Below is the code of training Naive Bayes Classifier on movie_reviews dataset for unigram model. I want to train and analyze its performance by considering bigram, trigram model. How can we do it. Answer Simply change your featurizer BTW, your code will be a lot faster if you change your featurizer to do use …
Why do we need to call zero_grad() in PyTorch?
Why does zero_grad() need to be called during training? Answer In PyTorch, for every mini-batch during the training phase, we typically want to explicitly set the gradients to zero before starting to do backpropragation (i.e., updating the Weights and biases) because PyTorch accumulates the gradients on subse…
Must have equal len keys and value when setting with an iterable
I have two dataframes as follows: leader: DatasetLabel: The Information dataset column names 0 to 6 are DatasetLabel about data and 7 to 12 are indexes that refer to the first column of leader Dataframe. I want to create dataset where instead of the indexes in DatasetLabel dataframe, I have the value of each …
Specifying pyODBC options (fast_executemany = True in particular) using SQLAlchemy
I would like to switch on the fast_executemany option for the pyODBC driver while using SQLAlchemy to insert rows to a table. By default it is of and the code runs really slow… Could anyone suggest how to do this? Edits: I am using pyODBC 4.0.21 and SQLAlchemy 1.1.13 and a simplified sample of the code …
URL for IBM Cloud Kubernetes deployment
This is a bit of a beginner’s question. I’m attempting to get a simple Hello World Python flask application deployed in a kubernetes cluster on IBM Cloud. The application (main.py): I build my Docker image with docker build –rm -t kube-hw . and Dockerfile: I run it locally with docker run &#…
Write Persian in slug and use it in address bar in django
I use django and in my models I want to write Persian in slugfield (by using utf-8 or something else) and use the slug in address of page I write this class for model: But there is nothing in slug column after save and I don’t know what to write in url to show Persian. Can you tell me what
How to use BeautifulSoup to parse google search results in Python
I am trying to parse the first page of google search results. Specifically, the Title and the small Summary that is provided. Here is what I have so far: The part I am stuck on now is going down the HTML path to parse the specific data that I want. Everything I have tried so far has just thrown an
Pandas sort_values does not sort numbers correctly
I’m new to pandas and working with tabular data in a programming environment. I have sorted a dataframe by a specific column but the answer that panda spits out is not exactly correct. Here is the code I have used: The result that the sort method yields values in column ‘overall league position…