AttributeError: type object 'Point' has no attribute 'orientation'

Question

AttributeError：类型对象 'Point' 在 Python 包

中没有属性 'orientation'

包结构

Graph/ 
 └── src/
    └── Graph/
        ├── __init__.py
        └── point.py

point.py

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y
    def __str__(self):
        return '('+str(self.x)+' , ' + str(self.y)+')'
    @classmethod 
    def orientation(cls, p, q, r):
        val = (float(q.y - p.y) * float(r.x - q.x)) - (float(q.x - p.x) * float(r.y - q.y))
        if (val > 0):
            return 1
        elif (val < 0):
            return 2
        else:
            return 0

_ init _.py

from .point import *

from Graph import Point
p1 = Point(1,1)
p2 = Point(2,2)
p3 = Point(3,2)
print(Point.orientation(p1,p2,p3))

AttributeError: 类型对象 'Point' 没有属性 'orientation'

Answer 1

使用 staticmethod 似乎工作正常

from __future__ import annotations


class Point:
    def __init__(self, x: float, y: float):
        self.x = x
        self.y = y

    def __str__(self) -> str:
        return '(' + str(self.x) + ' , ' + str(self.y) + ')'

    @staticmethod
    def orientation(p: Point, q: Point, r: Point) -> int:
        val = (float(q.y - p.y) * float(r.x - q.x)) - (float(q.x - p.x) * float(r.y - q.y))
        if val > 0:
            return 1
        elif val < 0:
            return 2
        else:
            return 0


p1 = Point(1, 1)
p2 = Point(2, 2)
p3 = Point(3, 2)
print(Point.orientation(p1, p2, p3))

AttributeError: type object 'Point' has no attribute 'orientation'

AttributeError: type object 'Point' has no attribute 'orientation'

python

pip

package

pypi

python-packaging