1#使用__metaclass__(元类)的高级python用法2classSingleton2(type):3def__init__(cls,name,bases,dict):4super(Singleton2,cls).__init__(name,bases,dict)5cls._instance=None6def__call__(cls,*args,**kw):7ifcls._instance is None:8cls._instance=super(Singleton2,cls).__call__(*args,**...
datetime json argparse 2. 关于座位选择框 选择框内桌子数量,大小,样式以及每个椅子位置都是可变的,例如我们可以将桌子颜色和是否圆角改变: 这主要依靠seatInf.json内的信息,展示如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 {"tableNum":6,"tablePos":[[0.02,0.15],[0.35,0.15],[0.68,0.15],[...
class Library: def __init__(self): self.books = [] # 添加 def add_book(self, book): self.books.append(book) # 添加新属性 def modify_book(self, ISBN, key, value): for book in self.books: if book.ISBN == ISBN: setattr(book, key, value) # 找书 def check_book(self, ISBN1)...
在Python中没有switch语句。你可以使用if..elif..else语句来完成同样的工作(在某些场合,使用 字典会更加快捷。) 在C/C++中,如果你想要写for (int i = 0; i < 5; i++),那么用Python,你写成for i in range(0,5)。你 会注意到,Python的for循环更加简单、明白、不易出错。
# <project_root>/tests/test_my_second_function.py import unittest import azure.functions as func from function_app import main class TestFunction(unittest.TestCase): def test_my_second_function(self): # Construct a mock HTTP request. req = func.HttpRequest(method='GET', body=None, url='...
class CoffeeShop:specialty = 'espresso'def __init__(self, coffee_price):self.coffee_price = coffee_price# instance methoddef make_coffee(self):print(f'Making {self.specialty}for ${self.coffee_price}')# static method @staticmethoddef check_weather():print('Its sunny') # class method@...
{"check_same_thread": False})Base = declarative_base()class UserSignUp(BaseModel):name: strsurname: Optional[str] = Nonebirth_year: Optional[int] = Nonenotes: Optional[str] = Noneclass User(Base):__tablename__ = "users"id = Column(Integer, primary_key=True, index=True)name = ...
classShape:# ...之前的代码...defrotate(self):# 这是一个简化的旋转方法，只适用于直线形状ifself...
groups,class_values):gini=0.0forclass_valueinclass_values:forgroupingroups:size=len(group)ifsize==0:continueproportion=[row[-1]forrowingroup].count(class_value)/float(size)gini+=(proportion *(1.0-proportion))returngini# Select the best split point for a datasetdefget_split(dataset):class...
check validity of permissions, user rights, etc.'''print(f"trying to create the file '{name}' for user '{user}' with permissions {permissions}") classProcessServer(Server): def__init__(self): '''actions required for initializing the process server'''self.name = 'ProcessServer'self....