Python Definition and 655 Threads

Okay so far I have come up with the following: The objective function is: 30LADA + 40LAHO + 50SADA + 40SAHO + 110DANY + 125DACH + 105HONY + 115HOCH (to read this please see the table above as I have just used the first two letters of each except NY which I have represented by NY). In these I...

So I am trying to do this tutorials but I want to use my own dataset. I am having problems "Build an input pipeline with tf.data." My question is about their code: def load_image_train(image_file): input_image, real_image = load(image_file) input_image, real_image =...

I am using "Introducing Python" (Lubanovic) to teach myself Python. I read that Python strings are immutable, then I see code like this - string1 = 'base_val' string1= 'new_val' not throw up an error. A little investigation shows me that the interpreter created two strings and string1 is a...

Hi PF! I've posted a bunch lately and you have been SO helpful (seriously, thank you all). Can you corroborate if my python script below matches the math? I'd seriously appreciate it! The math: $$\max_{x\in [0.7,1)}F(x) : F(x) := \sum_{t = 250}^{750} \log\left( P_{\nu=3} \left(...

I've been trying to find a way to calculate Gaussian curvature from a 4D metric tensor. I found a program that does this in Mathematica using the Brioschi formula. However, this only seems to work for a 2D metric or formula (I would need to use something with more dimensions). I've found...

Hi PF! I typically code in MATLAB. Here, if I run the following program %% Section 1 x = 5; y = 2; %% Section 2 z = x + y; everything works. But now let's say I wanted to change line 5 to z = x - y. In MATLAB this is simple: I can simply change line 5 and rerun section 2. Is there a way to...

Hey! 😊 I have written a code in Python for a server to search for movies. At the site for the user I have added at the html template the options to change the password and to delete the account. For this do I have to write a separate html or a separate endpoint for these ones or can I write...

Hey'all. First of all, I'm not fluent in English, so forgive me for the spelling mistakes. So, I'm trying to make a simulation of a solar system using python 3.9. It's not complicated, but my teacher wants me to do it using the Basic Verlet method, and that's what is bugging me. He told me do do...

Hey! 😊 I want to write a one-line Python generator or iterator expression that returns the sequence of integers generated by repeatedly adding the ascii values of each letter in the word “Close” to itself. The first 10 integers in this sequence are: 67, 175, 286, 401, 502, 569, 677, 788, 903...

I am attempting this homework exercise part b). I've modified my code but I get error overflow message. My goal is to modify my code so it returns kinetic and potential energy of Earth's orbit. I made a new f(z,t) and modified the rows 99 and 100 with dz[2]=-G*M*m/r, and dz[3]=0.5*m*y**2 but...

I am attempting this homework exercise but my plot does not show the whole trajectory. I don't know if it is something wrong with my equations or if it is a plotting matter. Cheers!This is my code:import matplotlib.pyplot as plt import numpy as np import scipy.integrate as spi G =...

Let's say that my_mock.method_calls gives me this array: [call.thing.pop(3, 4), call.thing.bob.smash(6, 7), call.thing.jig.slurp(4)] How can I extract the names 'thing', 'pop', 'bob', 'smash' etc. from this array?

Hey! 😊 I have written a program in Python where API calls to the server to get currency exchanges. Now I want to add a part for the user, i.e. with html. The endpoint is : @route_rates.route("/all/") def get_all(): return render_template("currency.html", my_currency =...

Hey! 😊 I am trying to write a code for a server in Python and I got stuck. I gave as an input a csv file and using pandas we get a dictionary where the titles are the keys and the inputs are the values. From that we get the below : I have written the below endpoint to get all the...

Hi, Question: Why is the error 'Error parsing inputs' in CVXPy occurring? Context: I am trying to solve a semidefinite program in CVXPy (using Google Colab). I went to the documentation (HERE) and I copied the example code into a cell. It doesn't work for some reason and I don't understand...

If you have used an online course pertaining to the title, could you write a short review? Not looking for a book.

Hi PF! I am trying to import k.txt file into Mathematica as a list of numbers. The k.txt looks like this: [5.315967917338153e-06, -3.204321972222162e-08, 3.6041782425371564e-09, -3.853442465663655e-08, 8.699510604529962e-07, -1.4284341965847237e-08, 2.855341882658808e-09...

I am absolutely new to Polymer simulation. I am trying to understand the simulation by analyzing source code written by others. Can anyone tell me what are the differences between the following three source code in terms of their objectives? Monte-Carlo-simulation-of-polymers...

# Test suite for Problem Set 3 (Simulating Robots) # Fall 2016 import sys import threading import traceback import unittest import random import imp test = imp.load_compiled("test", "test.pyc") import ps3 def xyrange(x_upper_bound, y_upper_bound): """ Returns the cartesian product of...

I wanted to declare a local variable inside a static method main(). My code looks like this - class Operator { static int a; public static void input() { Scanner in=new Scanner(System.in); System.out.println("Enter the number:"); a=in.nextInt(); //this is...

https://blog.miguelgrinberg.com/post/how-to-add-flask-migrate-to-an-existing-project I am using Visual Studio Code and have a database file already created called test.db. My environment variables for test.db name is SQLALCHEMY_DATABASE_URI and the value is sqlite:///test.db In the actual code...

Hi PF! I followed someone's help on here and have the following code in python that performs monte carlo integration from math import * from random import * def integrate(alpha): # MONTE CARLO INTEGRATION OVER NON-RECTANGULAR DOMAINS def f(pt): # RETURN INTEGRAND AS FUNCTION...

This is in python flask. I am getting an error line 16, in template <h2> <a href="{{ url_for('userinfo.profile', username=current_user.username, 'update_profile') }}"> update_profile_info </a> </h2> jinja2.exceptions.TemplateSyntaxError: invalid syntax for function call expression The...

Images comparison What are the best softwares available for comparing two images having similarity and differences? Two photos each of Margaret and Enid. 1 Margaret's first photo with her second photo comparison. 2 Enid's first photo with her second photo comparision. 3 Margaret's first...

Hi PF! I'm trying to write a code that, given a list of integers, will output the next lexicographic permutation. But my output gives me None, and I can't see why. Is it because I am incorrectly calling the reverse function? Any help is greatly appreciated! class Solution(object): def...

Hi everyone, I have to classify a DNA sequence with a LSTM neural network but I have a problem with the inputs shame. Both the sequence and the class are encoded with One Hot Encoding and my code is this: import pandas as pd import numpy as np data = pd.read_csv('splice.data', header = None)...

Hi everyone, Hopefully I'm writing this in the correct part of PhysicsForum. Here is my problem: I'm really struggling with my programming class (basics of python3 - loops, dictionaries, numpy). What I did this semester: 1. Participated in every class 2. Solved everything our course offered...

Hi PF! I am looking at the following code class ListNode: def __init__(self, val=0, next=None): self.val = val self.next = next def removeNthFromEnd(head: ListNode, n: int) -> ListNode: # Two pointers - fast and slow slow = head fast = head # Move fast...

Hi PF! I am running VS Code for python on Ubuntu. Is there a way to execute a specific python line? As I currently have it set up, on the terminal input at the bottom of the screen, I can only work through the terminal, so a command like print('hello world') won't do anything. THanks so mcuh!

Hey! :giggle: I found online the following code for a christmas tree in Python : tree_height = input("Enter the tree height : ") tree_height = int(tree_height) spaces = tree_height-1 hashes = 1 stump_spaces = tree_height-1 while tree_height != 0 : for i in range(spaces)...

Hello I learned object oriented programming in Python from a book. But it does not have any programming exercises. I do not learn very much unless I do some programming exercises. It helps to hone the skills. So, I am looking for some exercises if OOP Python is taught in universities. Usually...

Summary:: I'm not asking for help, but I'm asking for an opinion. Is this a sign that I probably should not be pursuing a career in software development or computer science? I basically feel like this in general wrt any subject I am studying, really, whenever I feel stumped on a given problem...

Hey! 😊 Construct a class named Vector that expresses the meaning of the vector of numbers. The initialization function, __init__ will take as a argument a tuple corresponding to the vector. This tuple will be stored in the variable named coord. Also, __init__ will calculate the Euclidean...

Hey! :giggle: Construct a class named Student which when initializing its objects has the following variables : - first_name (string) - last_name (string) - email (string) The class should also support the following functions implemented as functions (methods): - set_id_number: set a...

I need to make an application that uses database in python, what should I make? Firstly I need to tell about me. I know 0 about programming. I have learned basics of python only. What are the apps that use database that are upto my level of programming? I am planning to use django...

I want to find difference between two list. I came across sth called list comprehension. I can't tell you how confused I am with this. # Python 3 code to demonstrate # to remove elements present in other list # using list comprehension # initializing list1 list1 = [1, 3, 4, 6, 7] #...

def find_next_square(sq): # Return the next square if sq is a square, -1 otherwise sq2=(sq**1/2) xyz=isinstance(sq2, int) if (xyz==True): print("Is perfect square") nextsq=sq+1 print("Next perfect square=",nextsq**2) else: print("Not...

def find_next_square(sq): # Return the next square if sq is a square, -1 otherwise sq2=(sq**1/2) xyz=isinstance(sq2, int) if (xyz==True): print("Is perfect square") nextsq=sq+1 print("Next perfect square=",nextsq**2) else: print("Not perfect...

Here is the code that I am talking about-: n=int(input("Enter a number")) for num in range(2,n+1): for i in range(2,num): if(num%i==0): break else: print(num,end="") If I give n=5 output should be 2,3,5. Here is my dry run. Everything is fine except for 2...

I am learning to code and 1 thing that surprises me is how do I internalize all the code? I understand the code. I know the algorithm as well. But I want to be able to solve any types of problems(related ones) after learning 1 code. How do I become able to do that? So for that I am first trying...

I am learning to code and 1 thing that surprises me is how do I internalize all the code? I understand the code. I know the algorithm as well. But I want to be able to solve any types of problems(related ones) after learning 1 code. How do I become able to do that? So for that I am first trying...

I found this article about Alan Turing and his concept of Turing machines on the AMS website. Since we often get questions about countability and computability I thought it is worth sharing. https://blogs.ams.org/featurecolumn/2021/12/01/alan-turing-computable-numbers/ It also contains a Python...

Here's what I've done: Mentor note: replaced icode tags with code=python and \code pair. def valid_braces_placement(s, L): if len(L)==0: return False string = '' for element in L: string = string + str(element) D = ['+','-','*'] return...

I have been using Visual Studio Code for a couple months now and it has been fine. When I want to run some code, there is usually a little green triangle button in the top right corner that I can click on. A few days ago, that triangle turned white only for Python files (it is still green for...

str1="hello" for stringElement in str1: print("str1","=",stringElement) Strings are arrays in python and they are represented like this. Now I want to understand how the for loop is working here. My dry run-: for h in str1 print h for e in str1 print e and so on till...

# # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffd51d4257f, pid=9852, tid=11684 # # JRE version: OpenJDK Runtime Environment JBR-11.0.12.7-1504.40-jcef (11.0.12+7) (build 11.0.12+7-b1504.40) # Java VM: OpenJDK 64-Bit...

(I Didn't use code formatting here as I felt it was not necessary) I have read multiple textbooks, articles and watched multiple videos about name binding in python. Till now what I understand can be summarized in this-: x=1 means name x is binded to object "1" z=x and we know x=1 => z=1 so...

(I Didn't use code formatting here as I felt it was not necessary) I have read multiple textbooks, articles and watched multiple videos about name binding in python. Till now what I understand can be summarized in this-: x=1 means name x is binded to object "1" z=x and we know x=1 => z=1 so...

1) Basic python only no data science or machine learning or game development. 2) I have CS experience and some programming experience but I am really bad programmer, so you can discount my programming experience. But I can learn cs concepts on the go. 3) Contains lots of solved and unsolved...

What is the best IDE out there? It should be easy to use. Not as easy as online editors though.