Python

Python: Determining period of the day based on hour using a for loop and conditionals

datetime for-loop if-statement pandas python

I would like to name the period of the day based on hourly information to my dataframe. For this, I am attempting the following: However, when double-checking if the length of my day_period list is the same as that of my dataframe (df)… they differ and they shouldn’t. I can’t spot the mistak…

How To Recurisve JSON file without any loop (like:for,while,etc) in Python

dictionary json loops python recursion

I’m confuse how to create recursive function to print JSON file without any loops in Python3. So i have home work from my college, the subject is about recursion in function, the lecturer told me to to use recursion only instead of loops. My json file in Category.json is: My python code is: I’m no…

Fastest way to append a row to an existing data frame?

dataframe pandas python python-3.x

I know this question has been asked many a time, but none of the solutions already posted on this site is ideal. I have tested various methods found here, and timed them using IPython, I will post the results below: songs is a DataFrame with 4464 rows (initially) and 15 columns. I am fully aware DataFrame ind…

A series of graphviz diagrams in a single pdf file

graphviz python

I create a graphviz diagram. Using below code. I add nodes … and edges … and then call the below code. It creates me a pdf file and a dot file. network1.view(file_name). This way my diagram becomes very complicated. What I want is, to create a series of network objects instead of one and to visual…

Deutsch algorithm with NOT gate as oracle

python quantum-computing

I tried to implement Deutsch algorithm using qiskit. The following is a code. enter image description here I expected that the first classical bit is 0 (that is, the function corresponding to that oracle is a constant function). But, the output is the following. Why does the output imply the function is a bal…

how to label the minimum value on a regular line plot

matplotlib python

Here is a line plot generated from the following code: Now, I want to label (maybe add a small circle in red around that point) the minimum point that falls in between K = 20 and K = 25. How should I do this? Answer here you go:

Change X Axis Values to Days of Week (Mon – Sun) in Seaborn/Pandas

matplotlib pandas python seaborn

I’m currently doing a sales analysis I found online, and was wondering how I could display the x axis values (Days of the Week) from their current order to Mon – Sun. I have grouped the days of the week the item was bought using: Which returns: I want this displayed in descending order, and a grap…

Assigning keys and storing in a dictionary Python

dictionary numpy python random

For an event of rolling a six-sided die. I need to randomly simulate the event 1000 times and plot a histogram of results for each number on the dice. I want to assign the results for each number to a key of the same value (1 for number of 1s{1:164…}). I need help assigning keys and storing everyting in…

FiPy: How to find node (vertex) at interface between two mesh

fipy process python simulation

I’ve defined two meshes in FiPy via Gmsh and would like to find the nodes at the interface between the two mesh. Is there a way to do this in FiPy? I’d like to get all the nodes (or lines) at the interface between mesh m0 and m1. Answer FiPy has a function called nearest which gets the nearest val…