类的模板导入
作者：互联网
有时候我们给类添加的内容很长，是的文件显得冗长，我们就可以单独来一个文件放我们写好的类，在主文件中去导入这个模板的类然后在主文件中使用
导入的格式：from 文件名 import 类名
#类模板，文件名是carClassTemplate.py
class Car():
def __init__(self,make,model,year):
self.make = make
self.model = model
self.year = year
self.odometer_read = 0
def get_descriptive_name(self):
long_name = str(self.year)+" "+ self.make + " " + self.model
return long_name
def read_odometer(self):
print("the car's odometer is " + self.odometer_read + " !")
def update_odometer(self,mlies):
self.odometer_read = mlies
def increament_odometer(self,increament_mlies):
self.odometer_read += increament_mlies
def read_odometer(self):
print("the car's odometrs is "+ str(self.odometer_read) + " !")
#主文件
#使用导入类(从文件carClassTemplate.py中导入了一个类Car)
from carClassTemplate import Car
my_new_car = Car('audi','A6','2020')
my_new_car.update_odometer(200)
my_new_car.read_odometer() #the car's odometrs is 200 !
my_new_car.increament_odometer(98)
my_new_car.read_odometer() #the car's odometrs is 298 !
可以同时导入多个类(下面把Battery类的实例作为my_car类的属性为例）：
#类模板，文件名是carClassTemplate.py
class Car():
def __init__(self,make,model,year):
self.make = make
self.model = model
self.year = year
self.odometer_read = 0
def get_descriptive_name(self):
long_name = str(self.year)+" "+ self.make + " " + self.model
return long_name
def read_odometer(self):
print("the car's odometer is " + self.odometer_read + " !")
def update_odometer(self,mlies):
self.odometer_read = mlies
def increament_odometer(self,increament_mlies):
self.odometer_read += increament_mlies
def read_odometer(self):
print("the car's odometrs is "+ str(self.odometer_read) + " !")
class Battery():
def __init__(self):
self.battery_size = 70
def update_battery_size(self,new_battery_size):
self.battery_size = new_battery_size
def read_battery_size(self):
print("the car's batter size is " + str(self.battery_size) + " !")
#主文件
#使用导入类(从文件carClassTemplate.py中导入了类Car,类Battery
from carClassTemplate import Car , Battery
class my_car(Car):
def __init__(self,make,model,year):
super(my_car,self).__init__(make,model,year)
self.battery_size = Battery()
my_new_car = my_car('audi','A6',2020)
car_info = my_new_car.get_descriptive_name()
print(car_info) #2020 audi A6
my_new_car.battery_size.read_battery_size() #the car's batter size is 70 !
my_new_car.battery_size.update_battery_size(90)
my_new_car.battery_size.read_battery_size() #the car's batter size is 90 !
my_new_car.update_odometer(90)
my_new_car.read_odometer() #the car's odometrs is 90 !
my_new_car.update_odometer(200)
my_new_car.read_odometer() #the car's odometrs is 200 !
my_new_car.increament_odometer(90)
my_new_car.read_odometer() #the car's odometrs is 290 !
也可以导入整个模板，但是这时候就需要使用点来读取具体的类名称
import carClassTemplate #导入整个模板
class my_car(carClassTemplate.Car):
def __init__(self,make,model,year):
super(my_car,self).__init__(make,model,year)
self.battery_size = carClassTemplate.Battery()
my_new_car = my_car('audi','A6',2020)
car_info = my_new_car.get_descriptive_name()
print(car_info) #2020 audi A6
my_new_car.battery_size.read_battery_size() #the car's batter size is 70 !
my_new_car.battery_size.update_battery_size(90)
my_new_car.battery_size.read_battery_size() #the car's batter size is 90 !
my_new_car.update_odometer(90)
my_new_car.read_odometer() #the car's odometrs is 90 !
my_new_car.update_odometer(200)
my_new_car.read_odometer() #the car's odometrs is 200 !
my_new_car.increament_odometer(90)
my_new_car.read_odometer() #the car's odometrs is 290 !
from carClassTemplate import * #导入所有模板的类
上边是导入所有的类模板中的类，不推荐这种写法，原因有没有明确指出用到了哪些模板中类，这在接下来使用其他类的时候会有起名称有冲突的风险
标签：read,car,self,odometer,导入,new,my,模板 来源： https://www.cnblogs.com/boost/p/13359872.html