Python – Is there a method to calculate the signed area of a polygon? Question: I have a polygon defined in a Python list with (x, y) coordinates. # for example polygon = [(0, 0), (2, 0), (2, 2), (1, 1), (0, 2)] I would like to get the signed area of this polygon. I …
How to check if certain class methods have been called from within the same class Question: I have some code that looks like this: class Template: def insert_text(self, text): # code goes here return def insert_photo(self, path_to_photo): # some more code goes here return def compose(self): # this composes/generates the text file based on the …
Multiple object returns from method not acting as expected Question: While playing around with pyautogui I decided to make a method to limit the position of my cursor depending on the size of my monitor, since I was moving my cursor randomy. This is what my first attempt looked like. max_x = 10 max_y = …
Why some methods we can apply to an object and define it in a variable, but for some we cant? Question: if we have a file, we can read the lines and store it in a variable. such as: with open(‘test.py’, ‘r’) as file: f = file.readlines() however, for some methods we can’t add it …
Why don't callable attributes of a class become methods? Question: Consider the following snippet. import types def deff(s): print(f"deff called, {s=}") lam = lambda s: print(f"lam called, {s=}") class Clbl: def __call__(s): print(f"__call__ called, {s=}") clbl = Clbl() print(type(deff) == types.FunctionType) # True print(type(lam) == types.LambdaType) # True print(type(clbl) == Clbl) # True class A: …
How can I use the decorator pattern in Python to dynamically add methods to a class based on data in a dictionary? Question: Consider a scenario where you have a base class Animal and you want to add new methods to the class based on data stored in a dictionary. The data in the dictionary …
python index [-1] shows wrong element Question: As I learned, in python index -1 is the last number. for instant in: values = [1, 2 , 3, 4, 5, 6, 7, 8, 9, 10] print(value[-1]) returns 10 in output. Now, if I want to insert a number in the last position with insert method, I …
What is the type hint for a method? Question: What is the right type hint for a method? There is typing.Callable, but I’m looking for a method type hint, and typing.Callable[[Self, …], …] is not working. I’ve tried this but it doesn’t work: class _Object: """An empty object for method type.""" def method(self) -> None: …
'>=' not supported between instances of 'method' and 'int' Question: Here is the method causing the error: class Kilpailu(): def __init__(self, nimi, pituuskm, osallistujat): self.nimi = nimi self.pituuskm = pituuskm self.osallistujat = osallistujat def kilpailu_ohi(self): for i in self.osallistujat: if (i.getKuljettuMatka>=self.pituuskm): return True else: return False edit: here is also where getKuljettuMatka is defined class …
Is it possible to pass a column name as a parameter to a method and if so, how can I do that? Question: I want to replace values in different columns. Namely, if they contain a "Y", then with the value "Y" and if they contain an "N", then with the value "N". Since I …
