How can I query a DynamoDb table using a combination of the BETWEEN and BEGINS_WITH? A simplified example of my tables partition and sort key looks like this: If my SK didn’t include the …#tag postfix I could use a KeyConditionExpression like this: where start and end are e.g. 2022-05-13T08:45:00Z…
Tag: python
Why does my turtle not draw my race lanes?
So I’m making a turtle race, but I wanted to make my code shorter by using def. I haven’t used it before but I looked up examples and I have no idea what my code is missing because it doesn’t work. I basically want to draw a lot of “|” but with 15 rows and 5 columns with 20 ̵…
Pipline with SMOTE and Imputer Errors
i am trying to create a pipeline that first impute missing data , do oversampling with the SMOTE and the the model my code worked perfectly before i try smote not i cant find any solution here is the code without smote And here’s the code after adding smote Note: I tired importing make pipeline from iml…
Data type preference for training CNN?
I originally was using input data of int8 type ranging from 0-255 before learning that standardizing and normalizing should increase learning speeds and accuracy. I attempted both, with and without a mean of zero, and none of these methods improved learning speed or accuracy for my model relative to 0-255, in…
Writing a function that draws a cube. I can’t manage to make a full cube, just the y axis cube (more info in text)
as the title says, I want to make a program for school that draws rubiks cube. Essentially, user enters size of cube (3×3, 4×4, …) and the program reads the first number of the entered size. So if user writes 3×3, program will read the number ‘3’ at the beginning. From there, …
Python – How to print a whole url in a for loop not just characters
I have a variable called all_urls- it contains a list of URLs, for example: I want to print each URL using a for loop. but what I end up getting is: Does anyone know how to fix it so the program returns each URL? Thanks. Answer You can try with this: What I’m thinking is that you have a string
Python pattern right triangle with while loop in python
I need to print the numbers in a specific shape and order with a while loop, for loop is not allowed, but I don’t understand nor can I find anything on the web that can help me understand how can I move the figure a bit to the right or how I can flip it around. Here is the code
Why couldn’t I encrypt and decrypt a photo file using increments?
I made a very simple encryption and decryption program to encrypt files by incrementing all bytes by 6. However, in testing, only text files work. If I use it to encrypt and decrypt photos, the result is not readable by the OS. Code in Python: Answer This part needs to be changed to a else : Like this : Other…
How could i save all the hashes generated from jpg images into a csv file and not only the last one?
how to save all the hashes generated into the same csv file and not only the last one Answer Here, you’re overwriting your list_rows variable for every step in the loop. You should append to the list instead, and then write the content of the list to your csv. PS: Try not to override builtin (like hash)…
How do I square a column from an Excel file with pandas?
I’ve read an Excel file into python using: and I’m trying to square the columns using: I keep getting the error: I’m fairly new to python. Is there any way to easily fix this? Answer Never use apply-lambda for straightforward mathematical operations it is orders of magnitude slower than usin…