I have a 2d space of (x,y) coordinates that I want to model in python and want to know a way to define the 2d space in python where I can assign multiple values to a point (x,y). Later values at coordinates will be changed based on some coordinate dependent calculations. I thought about using numpy array to c…
How to use a pretrained model from s3 to predict some data?
I have trained a semantic segmentation model using the sagemaker and the out has been saved to a s3 bucket. I want to load this model from the s3 to predict some images in sagemaker. I know how to predict if I leave the notebook instance running after the training as its just an easy deploy but doesn’t …
Failed installing pyaudio on Google Colab with “ERROR: Failed building wheel for pyaudio”
Trying to install pyaudio on Google Colab but got an error “ERROR: Failed building wheel for pyaudio”. I got this error: Answer I just need to remove libav-tools from apt install and run this command again. Now pyaudio is installed successfully.
Creating and declaring list in class
I am trying to create a list within a class and then declaring elements in that list. I don’t even know if this is the right way for python. I have some java background. I didn’t add 10 elements in the list manually because I feel creating a dynamic list will be more useful. Answer Your problem li…
How to get keys of nested mongodb documents
I have data like this, I need all the keys from this mongodb collection like property1,property2 etc. I tried Answer You can use $objectToArray to read object keys dynamically and then run $reduce with $concatArrays to merge the results: Output: Mongo playground
When is `__dict__` re-initialized?
I subclass dict so that the attributes are identical to the keys: and it works as expected: But if I re-write __setattr__ as then __dict__ will be re-created in initialization and the attributes will turn inaccessible: Adding a paired __getattr__ as below will get around the AttributeError but still __dict__ …
replace masked with nan in numpy masked_array
I’d like to replace the masked result with nan. Is there a way to do that directly with numpy’s masked_array? Answer filled method replaces the masked values with the fill value: Or as you do, specify the fill value when defining the array: The masked mean method skips over the filled values:
How to extract json from nested column to dataframe
I’m pulling stock data from TD Ameritrade API and I want to store it in a DataFrame. From the API I get a nested JSON object and when I put it in a data frame I get 4 columns: Index, Candles, Empty, Symbol. However inside of candles is a dictionary that I want as separate columns in the dataframe (̵…
How to capitalize only first letter of first word in a list
I want to capital only first letter of first word of list and remaining all words to be in lower case in ascending order of the length of word. I want the result like this in ascending order of length. In the are lines order printed reverse : Actual output that I am trying to get: Answer Your code does
A full and minimal example for a class (not method) with Python C Extension?
Everywhere, I can easily find an example about writing a method with Python C Extensions and use it in Python. Like this one: Python 3 extension example How to do write a hello word full featured Python class (not just a module method)? I think this How to wrap a C++ object using pure Python Extension API (py…