I have an assignment problem on using a stack data structure to solve problems. I am prompted to make the following stack function. Task: Using the stack you created, write the function prefix_infix that takes in a prefix expression (represented as a list) and returns the expression in fully parenthesized inf…
Tag: python
Pandas DataFrame Style for this condition
How can I use df.style for subsets of a DataFrame based on this given condition? I want to highlight the cells in which it is False. But make changes to df, not just df1 Have edited the question. It is different from the previous questions because they are only dealing with element-wise coloring. But I want t…
how does scope work when using property in Python 3?
Newbie question about scope: in the following example, how is property able to get access to getx and setx etc. That is, why don’t those names have to be qualified with a C.getx, for example? The code is directly from the python docs (https://docs.python.org/3/library/functions.html#property): Update: b…
Formatting Json for Python LocustIO
Why am I getting bad request for this post calls? It has to do with json formatting. How do I reformat the json object passed as param? I’m running a load test using LocustIO and Python. Answer json.dumps takes as input json object (lists & dictionaries) and serializes it giving a string as output. …
Pandas: reading Excel file starting from the row below that with a specific value
Say I have the following Excel file: I want to read the file in a dataframe making sure that I start to read it below the row where the Start value is. Attention: the Start value is not always located in the same row, so if I were to use: this would fail as skiprows needs to be fixed. Is
What does calling fit() multiple times on the same model do?
After I instantiate a scikit model (e.g. LinearRegression), if I call its fit() method multiple times (with different X and y data), what happens? Does it fit the model on the data like if I just re-instantiated the model (i.e. from scratch), or does it keep into accounts data already fitted from the previous…
How do I install Jupyter notebook on an Android device?
Is there a way to install a functional instance of Jupyter notebook on an Android device? Specifically, I want to use Jupyter to run a Python notebook. Answer I found some information on the web (like in this blog post) while I was coming up with the answer for this question, but it was all at least somewhat …
Iterable over raw text documents expected, string object received
I am currently trying to build a naive Bayes classifier as mentioned in this link. Referring to the line under the Training the Classifier subheading, I had a similar line, X_new_counts = count_vect.transform(input.plot_movie) in my code which should take an iterable as an input to the transform function. The…
Download a folder from S3 using Boto3
Using Boto3 Python SDK, I was able to download files using the method bucket.download_file() Is there a way to download an entire folder? Answer quick and dirty but it works: Assuming you want to download the directory foo/bar from s3 then the for-loop will iterate all the files whose path starts with the Pre…
AWS Lambda – unable to import module ‘lambda_function’
Like many others before me, I’m trying to run an AWS Lambda function and when I try to test it, I get “errorMessage”: “Unable to import module ‘lambda_function’” My Handler is set to lambda_function.lambda_handler, and I indeed have a file named lambda_function.py which con…