class SalesManage: def __int__(self): self.saleslist = [] def load_sales_data(self): with open('sales.txt', "r", encoding="utf-8") as f: lines = f.readlines() for i in lines: month, sales = i.strip().split(' ') self.saleslist.append(Sales(month, sales)) 这段代码出现了'SalesManage' object has no attribute 'saleslist'的错误怎么改
时间: 2024-01-07 20:03:36 浏览: 25
这个错误通常是因为在类的某个方法中使用了一个属性,但是这个属性并没有被正确地初始化。在你的代码中,你定义了 `__int__` 方法,但正确的构造方法名称应该是 `__init__`。所以修改这个方法名称即可:
```
class SalesManage:
def __init__(self):
self.saleslist = []
def load_sales_data(self):
with open('sales.txt', "r", encoding="utf-8") as f:
lines = f.readlines()
for i in lines:
month, sales = i.strip().split(' ')
self.saleslist.append(Sales(month, sales))
```
这样就能够正确初始化 `saleslist` 属性了。
相关问题
class Vector: def __int__(self,data): self.data = data什么意思
这段代码定义了一个名为Vector的类。类是一个对象的模板,它定义了对象的属性和方法。在这个类中,有一个构造函数__init__(),它会在创建对象时自动调用。构造函数有一个参数data,用于初始化对象的属性self.data。self是一个指向对象本身的引用,可以理解为this指针。因此,这段代码的意思是创建一个Vector类,它有一个属性data,用于存储向量的数据。
优化代码class DeliveryRequest: def __init__(self, name, location, time): self.name = name self.location = location self.time = time class DeliveryStation: def __init__(self, location): self.location = location self.requests = [] def add_request(self, request): self.requests.append(request) def match_deliveryman(self, deliverymen): for request in self.requests: for deliveryman in deliverymen: if request.location == deliveryman.location and request.time == deliveryman.available_time: print(f"您有一个快递将送给{request.name},请您按时送货") print(f"您的快递将由{deliveryman.name}在{request.time}送达,请您按时等候") deliverymen.remove(deliveryman) break class DeliveryMan: def __init__(self, name, location, available_time): self.name = name self.location = location self.available_time = available_time class Dispatcher: def __init__(self, delivery_stations, deliverymen): self.delivery_stations = delivery_stations self.deliverymen = deliverymen def dispatch(self): for station in self.delivery_stations: station.match_deliveryman(self.deliverymen)
可以考虑优化代码的可读性和效率,例如使用列表推导式和更好的命名:
```python
class DeliveryRequest:
def __init__(self, name, location, time):
self.name = name
self.location = location
self.time = time
class DeliveryStation:
def __init__(self, location):
self.location = location
self.requests = []
def add_request(self, request):
self.requests.append(request)
def match_deliveryman(self, deliverymen):
for request in self.requests:
matching_deliverymen = [dm for dm in deliverymen if dm.location == request.location and dm.available_time == request.time]
for deliveryman in matching_deliverymen:
print(f"您有一个快递将送给{request.name},请您按时送货")
print(f"您的快递将由{deliveryman.name}在{request.time}送达,请您按时等候")
deliverymen.remove(deliveryman)
break
class DeliveryMan:
def __init__(self, name, location, available_time):
self.name = name
self.location = location
self.available_time = available_time
class Dispatcher:
def __init__(self, delivery_stations, deliverymen):
self.delivery_stations = delivery_stations
self.deliverymen = deliverymen
def dispatch(self):
for station in self.delivery_stations:
station.match_deliveryman(self.deliverymen)
```
这样,我们使用列表推导式来创建了一个匹配的快递员列表,然后使用一个 for 循环来遍历它。我们也使用更好的变量名来提高代码的可读性。