reydx

if key not in my_dict:
    my_dict[key] = []
my_dict[key].append(new_value)

# 等价于
my_dict.setdefault(key, []).append(new_value)

# 等价于
import collections
my_dict = collections.defaultdict(list)

reydx

# -*- coding: UTF-8 -*-
# 组合模式

from abc import ABCMeta, abstractmethod


class Graphic(metaclass=ABCMeta):
    @abstractmethod
    def draw(self):
        pass

reydx

# -*- coding: UTF-8 -*-
# 桥模式

from abc import ABCMeta, abstractmethod


class Shape(metaclass=ABCMeta):
    def __init__(self, color):
        self.color = color

reydx

# -*- coding: UTF-8 -*-
# 适配器模式

from abc import ABCMeta, abstractmethod


class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        pass

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# -*- coding: UTF-8 -*-
# 单例模式



class Singleton:
    def __new__(cls, *args, **kwargs):
        if not hasattr(cls, "_instance"):
            cls._instance = super(Singleton, cls).__new__(cls)
        return cls._instance

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# -*- coding: UTF-8 -*-
# 建造者模式

from abc import ABCMeta, abstractmethod


class Player:
    def __init__(self, face=None, body=None, arm=None, leg=None):
        self.face = face
        self.body = body

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# -*- coding: UTF-8 -*-
# 抽象工厂模式

from abc import ABCMeta, abstractmethod


class PhoneShell(metaclass=ABCMeta):
    @abstractmethod
    def show_shell(self):
        pass

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# -*- coding: UTF-8 -*-
# 工厂方法模式

from abc import ABCMeta, abstractmethod


class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        pass

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# -*- coding: UTF-8 -*-
# 简单工厂模式

from abc import ABCMeta, abstractmethod


class Payment(metaclass=ABCMeta):
    @abstractmethod
    def pay(self, money):
        pass

reydx

1 表头加单位, 数字不加单位

2 注意数字字体, 保证单个数字的宽度相同

3 数字右对齐