I want to divide the first column of this table element wise by 3.6. enter image description here It throws an error something like : Here’s what I tried: Answer There are several ways to do it, here are two. I suggest from your error message that your data is in a pd.DataFrame. I used a shortened versi…
Tag: list
Remove [255,255,255] entries from list of image RGB values
I reshaped an image (included below) as a list of pixels, and now I want to remove the black ones (with value [255,255,255]). What is an efficient way to do it? I tried using IM[IM != [255,255,255]] and I got a list of values, instead of a list of value triplets. Here is the code I’m using: Answer The i…
multiprocessing loop over a simple list?
I have a function that calls a custom function that compares rows in a dataframe and calculates some stats. vt.make_breakpts it needs a dataframe (data), a key (unique identifier), and a datefield (date) to do it’s thing. I can run this and wait a very long time and it will go through and entire datafra…
Updating values inside a python list
I want to update the price by using the function update_item. It fails at update_price = append(a[‘price’].data_2) Answer You can assign the value to the dictionary, with:
How can i convert the index of a string that is marked as a string in an integer number?
I am trying to code a Caesar cipher and i am trying to make a loop around the alphabet so that even if a put a high number as a shifter it doesn’t give me an error. The problem is it tells me i can’t compare a string with a number, so when i put the new index like this
Binary search through string tuple in list
I’m trying to do a binary search through a list of tuples, when I give a inputq = “BB”, it is not show a correct search. This is my data: This my code: when I give inputq = “BB” the output it always show like this: (‘BF’, ‘Burkina Faso’, 13.0, -2.0) I woul…
How do I print a dictionary’s keys based on its value?
So, I’ve created a dictionary of key, value pairs for course name and student ID respectively. I want to be able to iterate through the dictionary and print all of the keys (course names) that contain a particular value (student ID). So, here’s the first initialization of variables followed by ask…
Python – Solve some mathematical problems in a list filled with random elements [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 months ago. Improve this question Task: In a list filled with random numbers you need to count: A sum of ne…
python remove duplicates from a list of list with uneven distribution
i have a python list of lists i want to merge all the containing list with at least 1 common element and remove the similar items i have a big set of data which is a list of lists, with some common data in some of the containing lists, i want to merge all lists with common data the elements
How do i convert a modified list of The Alphabet into a number?
i want to convert the sentence from variable (salam) into numbers. The conversion table is like a modified alphabet just like in (char2). My expected output is a 3×3 matrix, inside is the converted number from(salam) using (char2) and the output is here is the image for clarity Answer The problem is from…