List of coordinates filtering Question: In python I have a list of contours (each holding x, y, w, and h integers), I need to somehow iterate over the list and check, if the current x + w is greater than the last x + w by less than 3 (which mean by 1 or 2) …
What does `map(lambda s: s != None, some_list)` mean? Question: I am trying to understand the Deep Q-learning algorithm for standard Cart-pole example using this tutorial, and in def optimize_model() method, I don’t understand whether the lambda expression returns a boolean or an index: non_final_mask = torch.tensor(tuple(map(lambda s: s is not None, batch.next_state)), device=device, dtype=torch.bool) …
using pandas apply lambda with conditions Question: Product Price Timestamp AdjPrice A1 1142 1/3/2022 A1 1148 1/4/2022 A1 1177 1/5/2022 A1 1163 1/6/2022 A1 1160 1/7/2022 I have the above dataframe. The last column (AdjPrice) must be populated by multiplying the Price with a static factor (0.15 for instance), if the Timestamp is less than …
Search DataFrame column for words in list Question: I am trying to create a new DataFrame column that contains words that match between a list of keywords and strings in a df column… data = { ‘Sandwich Opinions’:[‘Roast beef is overrated’,’Toasted bread is always best’,’Hot sandwiches are better than cold’] } df = pd.DataFrame(data) keywords …
Using an `if` statement inside a Pandas DataFrame's `assign` method Question: Intro and reproducible code snippet I’m having a hard time performing an operation on a few columns that requires the checking of a condition using an if/else statement. More specifically, I’m trying to perform this check within the confines of the assign method of …
Using lambda function to switch between different functions in python gives TypeError if invalid function name is given with argument Question: I recently learned lambda functions and switch case and I’m playing with them to understand better. Here, I’m trying to use lambda function to switch between different functions in python like the following def …
Creating a df based on total permutations deriving from user-input variables Question: I would like to pass ‘n’ amount of cities to travel to and corresponding days in each city to a function that would return a df with all possible permutations of the journey. The kayak_search_url column in the df should contain this string …
How to read text file on AWS Lambda environment Question: I am trying to read and store the values of a text file in a variable so that I can covert that text file into CSV file afterwards. But I am getting this error that the file is not found. I used the exact path …
Python || Pandas || How to put multiple conditions in Lambda Question: I have two columns called "Status" & "DELTA_TIME", I want to create a new column called "Past Minute" and I wish to add values based on the below conditions. If the status is Open & Checkin and DELTA_TIME is below 30, the "Past_Minute" …
Lambda function operations using groupby.apply() in dataframe Question: I have a DataFrame that looks like this: The code to build it is: data = {‘Position Date’: [‘2022-01-02’, ‘2022-01-02’, ‘2022-01-02’, ‘2022-01-02’, ‘2022-01-03’, ‘2022-01-03’, ‘2022-01-03’, ‘2022-01-03’], ‘Client’: [‘Client 1’, ‘Client 1’, ‘Client 2’, ‘Client 2’, ‘Client 1’, ‘Client 1’, ‘Client 2’, ‘Client 2’], ‘Product’: [‘Product 1’, ‘Product …
