How do you calculate the amount of prime numbers less than or equal to N? Question: I want to write a program that determines the amount of prime numbers less than or equal to N (variable containing user input). This is what I’ve got: N = int(input("Enter number: ")) count = 0 primes = [] …
Variable returns empty even when assigned by dictionary – Python Question: When crying to convert an RGB value to Hex using dictionaries one variable returns correctly as the Key turned to the Hex value but when tried with a second variable it returns as None. capitalization doesnt seem to be the problem. def rgb(r, g, …
How to find the biggest possible combination of two numbers under a certain threshold from a list? Question: So let’s say if the list is [2,5,14,18,44], what I want to find out is what the biggest sum of two numbers under 60 would be. So the correct answer should be (14,44) Right now I am …
Parametric curve is always in front of Surface Question: I am trying to build an animation of a Dehn twist in a torus in Manim. My goal is to get something that looks like this: I managed to parametrize the curve and surface correctly in Manim. As you can see, the portion of the parametric …
Float division issue in Python (tkinter) Question: I’m working on a program which uses inputs from a tkinter interface to calculate the relative funniness of a joke based on sciencewritenow.com’s formula: H ≥ ((((T1 + T2) / (T3 – R)) × I ) / D = ((T3 / T4) × S)) × B While I …
Sympy yields `TypeError: unsupported operand type(s) for *: 'interval' and 'complex'` for complex rational expression Question: I have this sympy script: from sympy import * from sympy.plotting import plot_implicit x, y = symbols(‘x y’, real=True) alpha = sqrt(2) / 2 expr = 1 + ((1-alpha) * x + y*I) / (1 – alpha * (x …
Octal to Decimal conversion of number Question: I want to convert an octal number into a decimal one. Why am I getting 6 as an output instead of 83? import math def octalToDecimal(octalNumber): decimalNumber = 0 i = 0 while (math.floor(octalNumber) != 0): rem = math.floor(octalNumber) % 10 octalNumber /= 10 decimalNumber += rem * …
Is there an efficient way to determine if a sum of floats will be order invariant? Question: Due to precision limitations in floating point numbers, the order in which numbers are summed can affect the result. >>> 0.3 + 0.4 + 2.8 3.5 >>> 2.8 + 0.4 + 0.3 3.4999999999999996 This small error can become …
How to plot multiple periods using pyplot? Question: everyone! I’m learning about signals now, but I’m having a tough time trying to plot more than one period using pyplot. I don’t know if the problem is with the mathematical part or with the code itself. I think this is a silly question, but any help …
numpy e^i(theta) and trigonometric cos(theta) + isin(theta) does not match Question: I read, So I tried to do apply this to a list of points as shown below And below part works perfectly as expected. Zj = np.array([1. +0.j , 0.5+0.5j, 0. +0.j , 0.5-0.5j, 1. +0.j ]) δj = Zj[1: ] – Zj[:-1] assert(np.allclose(δj, …
