使用Pylons 0.9.7，我正在尝试创建一个函数，该函数可以按需连接到数据库。我希望它可以从所有模型类中的所有函数访问。
在 model/__init__.py 文件中，我有：
#Establish an on-demand connection to the central database
def connectCentral():
engine = engine_from_config(config, sqlalchemy.central. )
central.engine = engine
central.Session.configure(bind=engine)
这个函数可以在任何地方访问。但是，当我尝试从model/class.py中指定的类内部运行它时，它会返回：
NameError: global name connectCentral is not defined
我需要进行任何特殊的进口手续吗？有更好的方法吗？
谢谢。
from model import connectCentral
你做了 import init 了吗？还是更好的是 from init import connectCentral ？
如果您这样做了，那么该名称应该被定义。如果没有，您可以尝试在方法体中写入global connectCentral，但我认为这只适用于使用全局变量。
你确定这个模块的名字应该是init.py而不是__init__.py吗？你能发一些更多的代码，让我看看你在哪里尝试使用你的函数吗？
编辑
所以你有__init__.py，很好。你正在做from model import connectCentral的导入吗？你没有任何循环导入（例如class.py中的从__init__.py导入和从class.py导入__init__.py）吗？
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