Юрыч BRO's questions

我正在为 tkinter 编写一个小包装。我正在改变方法__setitem__，，，。该包装器旨在使窗口定制变得更容易、更直观。简化的一个利基是，因为它唯一参数的格式可能看起来不明显。有如下代码，请重点关注wm_geometry方法：__getitem____init__wm_geometrywm_geometry

from tkinter import *
from typing import Any


def __str(i: str | None):
    if i == None:
        return ''
    return str(i)

def __unary_str(i: str | None):
    if i == None:
        return ''
    if i >= 0:
        return f'+{i}'
    return str(i)


class Tk(Tk):
    def __init__(
            self, screenName: str | None = None, baseName: str | None = None,
            className: str = "Tk", useTk: bool = True, sync: bool = False,
            use: str | None = None
            ) -> None:
        super().__init__(screenName, baseName, className, useTk, sync, use)
        self._icon_path = 'default'

    def __setitem__(self, key: str, value: Any) -> None:
        match key:
            case 'icon':
                self.iconbitmap(value)
                self._icon_path = value
            case 'title':
                self.title(value)
            case _:
                return super().__setitem__(key, value)
    
    def __getitem__(self, key: str) -> Any:
        match key:
            case 'icon':
                return self._icon_path
            case 'title':
                return self.title()
            case _:
                return super().__getitem__(key)
    
    def wm_geometry(self, *args):
        """Sets geometry of the window. Arguments can be provided in different
        ways:
        wm_geometry(size: tuple, pos: tuple) -> None
        wm_geometry(width: int, height: int, x: int, y: int) -> None
        wm_geometry(geometry: str) -> None
        wm_geometry() -> str
        """
        if not args:
            return super().wm_geometry()
        if len(args) == 4:
            args = ((args[0], args[1]), (args[2], args[3]))
        if len(args) == 2:
            if args[0]:
                size = 'x'.join(map(__str, args[0]))
            else:
                size = ''
            if args[1]:
                pos = ''.join(map(__unary_str, args[1]))
            else:
                pos = ''
            args = [pos+size]
        super().wm_geometry(args[0])
    
    geometry = wm_geometry
    

if __name__ == '__main__':
    root = Tk()
    root.geometry((800, 600), ())

作为其执行的结果，我得到一个异常：

Traceback (most recent call last):
  File "c:\Users\PCyur\OneDrive\Рабочий стол\tkinter_wrapper.py", line 65, in <module>
    root.geometry((800, 600), ())
  File "c:\Users\PCyur\OneDrive\Рабочий стол\tkinter_wrapper.py", line 50, in wm_geometry
    size = 'x'.join(map(__str, args[0]))
                        ^^^^^
NameError: name '_Tk__str' is not defined

原则上，我的代码中不存在这样的名称，这是什么问题？

有必要找到某个点属于 32 个部分之一。这些部分像方形蛋糕一样将矩形 450 除以 450 - 以 11.25 度角的形式，所有光线都来自中心。

如果你通过一个以矩形中心为中心的标记点构建一个圆，那么找出圆的最高点与标记点之间的角度的公式是什么？由此很容易推导出节号。重要的是，大于 180 度的角度被认为是在这个方向上，而不是在相反的方向上。

前几天我开始学习bs4。第一个小程序是covid统计解析。对我的代码提出建议或意见，我无法判断自己解析的质量。一开始我想通过正则表达式来做，但后来我意识到最好不要）。这是我的代码：

from bs4 import BeautifulSoup
from requests import get
from prettytable import PrettyTable
import tkinter as tk

SOURSE = r'https://стопкоронавирус.рф/'

def get_code(sourse):
    html = get(sourse).text
    contents = BeautifulSoup(html, 'html.parser')
    return contents

def get_container(contents):
    return contents.find('div', class_="cv-countdown")

def get_items(container):
    return container.find_all('div', class_="cv-countdown__item")

def remove_br(code):
    return code.replace('<br>', ' ').replace('<br/>', ' ').replace('</br>', ' ')

def to_dict(items):
    
    def key(i):
        i = i.find('div', class_='cv-countdown__item-label')
        for x in i.select('div'):
            x.decompose()
        i = i.get_text().strip()
        return i
    
    def value(i):
        return i.find('div', class_='cv-countdown__item-value').span.get_text()
    
    return {key(i): value(i) for i in items}

def get_stats():
    return to_dict(get_items(get_container(get_code(SOURSE))))

def convert_to_table(dict_):
    table = PrettyTable()
    table.field_names = ['Параметр', 'Значение (чел.)']
    arr = zip(dict_.keys(), dict_.values())
    table.add_rows(arr)
    return table

def show_in_window(data, title='Stats', font_size=15):
    root = tk.Tk()
    root.title(title)
    label = tk.Label(text=data, font=f'Consolas {font_size}')
    label.pack()
    root.mainloop()

stats = get_stats()
table = convert_to_table(stats)
show_in_window(table)
print(table)

更新：更新了代码。现在元素不是通过一堆方法来搜索的，而是通过嵌套的 css 选择器来搜索的。

from bs4 import BeautifulSoup as bs
from requests import get
from prettytable import PrettyTable
import tkinter as tk

SOURSE = r'https://стопкоронавирус.рф/'
HTML = get(SOURSE).text
SOUP = bs(HTML, 'html.parser')
HTML_PATH = 'html body .cv-countdown .cv-countdown__item'


def get_items():
    items = SOUP.select(HTML_PATH)
    return items


def to_dict(items):
    
    def key(i):
        i = i.find('div', class_='cv-countdown__item-label')
        for x in i.select('div'):
            x.decompose()
        i = i.get_text().strip()
        return i
    
    def value(i):
        return i.find('div', class_='cv-countdown__item-value').span.get_text()
    
    return {key(i): value(i) for i in items}


def get_stats():
    return to_dict(get_items())


def convert_to_table(dict_):
    table = PrettyTable()
    table.field_names = ['Параметр', 'Значение (чел.)']
    arr = zip(dict_.keys(), dict_.values())
    table.add_rows(arr)
    return table


def show_in_window(data, title='Stats', font_size=15):
    root = tk.Tk()
    root.title(title)
    label = tk.Label(text=data, font=f'Consolas {font_size}')
    label.pack()
    root.mainloop()

stats = get_stats()
table = convert_to_table(stats)
show_in_window(table)
print(table)