我有一个包含几个文件的包。每个文件都包含一个类,并且这些类是相互依赖的。如何在不将所有代码放在一个文件中的情况下避免循环依赖。有没有更好的方法来重构代码或者有没有办法解决循环导入
这是目录结构
.
|-- Complainant.py
|-- Complaint.py
`-- __init__.py
投诉.py:
from .Complainant import Complainant
class Complaint(BaseDocument):
ALL_STATUS = ["waiting","resolved", "rejected"]
text = TextField()
timestamp = DateTimeField()
status = TextField()
complainant_id = TextField()
department_ids = ListField(TextField())
def get_complainant(self):
db = DBManager.db()
complainant = Complainant.load(db, self.complainant_id)
return complainant
投诉人.py
from .Complaint import Complaint
class Complainant(BaseDocument):
account_type = TextField()
account_handle = TextField()
complaint_ids = ListField(TextField())
def get_complaints(self):
db = DBManager.db()
complaints = [Complaint.load(db, i) for i in self.complaint_ids]
return complaints
初始化 .py
from .Complaint import Complaint
from .Complainant import Complainant
__all__ = [
Complaint,
Complainant
]
最佳答案
在具有循环依赖的系统中,为了避免循环导入,您通常必须将相互依赖的部分放在同一个模块中。
在您的情况下,只有一小部分类 Complaint
和 Complainant
是相互依存的。您可以重构模块以将非相互依赖的部分放入 BaseComplaint.py
中的类中。和 BaseComplainant.py
,并使用第三个模块来定义子类Complaint
和 Complainant
.
目录结构:
.
|-- BaseComplainant.py
|-- BaseComplaint.py
|-- ComplaintComplainant.py
`-- __init__.py
BaseComplaint.py:
class BaseComplaint(BaseDocument):
ALL_STATUS = ["waiting","resolved", "rejected"]
text = TextField()
timestamp = DateTimeField()
status = TextField()
complainant_id = TextField()
department_ids = ListField(TextField())
BaseComplainant.py
class BaseComplainant(BaseDocument):
account_type = TextField()
account_handle = TextField()
complaint_ids = ListField(TextField())
ComplaintComplainant.py(也许你能找到更好的名字)
from .BaseComplaint import BaseComplaint
from .BaseComplainant import BaseComplainant
class Complaint(BaseComplaint):
def get_complainant(self):
db = DBManager.db()
complainant = Complainant.load(db, self.complainant_id)
return complainant
class Complainant(BaseComplainant):
def get_complaints(self):
db = DBManager.db()
complaints = [Complaint.load(db, i) for i in self.complaint_ids]
return complaints
初始化文件
from .ComplaintComplainant import Complaint, Complainant
__all__ = [
Complaint,
Complainant
]
关于python-3.x - python3中的循环导入,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39850696/