In the following code, I understand that the print of tree(named in the code) and parent(named in the code) should not be the same. But I do not understand, why the tree is always updating according to the updating of parent? (This question continues the last question here) Code: Output: In the code, it is ob…
How to make Canvas vertex instructions relative to a widget in Kivy
I just started learning Kivy and I was trying to understand how the Canvas instructions are affected on resizing of the window of the kivyApp. In the Kivy documentation it is mentioned that – The example which follows, shows how to bind the size and position of a Rectangle instruction to the size and po…
script to get the file last modified date and file name pyspark
I have a mount point location which is pointing to a blob storage where we have multiple files. We need to find the last modified date for a file along with the file name. I am using the below script and the list of files are as below: Answer If you’re using operating system-level commands to get file i…
Efficiently render 3D numpy bitmap array (y, x, RGB) to window on macOS (using openCV or otherwise)
I’m rendering a dynamically changing numpy bitmap array and trying to improve my framerate. Currently I’m using openCV: This takes ~20ms, which is not bad. But can I do better? Setting this has no noticeable effect. But does openCV offer a better technique than imshow to make use of a GL drawing s…
Preventing reference re-use during deepcopy
Consider the following example: The first print outputs what I would expect because the same reference is duplicated in the list. However, the second print surprised me. I would have expected the deepcopy to end up with two independent references inside the copy list. Instead it maintains the property of a si…
Numpy apply along axis based on row index
Trying to apply numpy inbuilt function apply_along_axis based on row index position OP: The function: Op: But is there a way to use this function based on row index position for example, if its a even row index then add 10 and if its a odd row index then add 50 Sample: Answer When iterating on array, directly…
Pandas To_Excel parsing problem – outputting only 1 file
Hello I have working code like this: Problem is: If I leave it like this it only outputs for first if. When I comment out that if section it will successfully output elif, but I can’t get it to output 2 files whatever I do. Any ideas? Error I’m getting for Acryptos: But if I comment out Autofarm a…
Cramer V correlation in python but instead of using frequency using weights?
So the dataset for Cramer V correlation has multiple categorical variables in columns, but there is also a column that is there telling us how often these values appear. Similar to table below: I want to figure out how to calculate the Cramer V correlation between season/Age/Weather and the weight is sales? I…
How to search and get rid of this character?
I have a lot of strings in a text file, and I noticed that one has this <200f> char. I want to find all entries that have this char and remove it. But in Vim I can’t find it by searching ‘<200f>’ using the search string ‘<200f>’. Probably it is one char not 6 in…
Trying to use SQLAlchemy relationships
As an example, I have a cities table and a movie theaters table. A city has multiple movie theaters so: now i want to get all theaters for a city: This query throws error: not sure what I’m doing wrong? Answer Something like this should automatically do the join for you: And then the query would be Make…