For future readers, this can also happen if you name a python file the same name as a dependency your project uses. For example: I cannot have a file named retrying.py that is using the retrying package. Assuming I had the retrying package in my project, I could not have a file called retrying.py with … Read more
If you do import foo (inside bar.py) and import bar (inside foo.py), it will work fine. By the time anything actually runs, both modules will be fully loaded and will have references to each other. The problem is when instead you do from foo import abc (inside bar.py) and from bar import xyz (inside foo.py). … Read more
EDIT: Below I describe a basic event messaging system I have used over and over. And it occurred to me that both school projects are open source and on the web. You can find the second version of this messaging system (and quite a bit more) at http://sourceforge.net/projects/bpfat/ .. Enjoy, and read below for a … Read more
The constructor of your class A calls the constructor of class B. The constructor of class B calls the constructor of class A. You have an infinite recursion call, that’s why you end up having a StackOverflowError. Java supports having circular dependencies between classes, the problem here is only related to constructors calling each others. … Read more
go list -f ‘{{join .Deps “\n”}}’ <import-path> Will show import dependencies for package at <import-path> – or in current directory if <import-path> is left empty. Alternatively go list -f ‘{{join .DepsErrors “\n”}}’ <import-path> hopefully shows some useful information in your case. See also the output of go help list for additional information about the go … Read more
Here’s what you need to do: Right click on the DAL Project in the solution explorer and select Project dependencies in the context menu. You will now see a window that shows the project dependencies of the DAL Project. Make sure that BAL isn’t checked. Now you should be able to add your reference… I … Read more
Reason [1] Faster compile times Not in my projects: source files (CPP) only include the headers (HPP) they need. So when I need to recompile only one CPP because of a tiny change, I have ten times the same number of files that are not recompiled. Perhaps you should break down your project in more … Read more
Importing Python Modules is a great article that explains circular imports in Python. The easiest way to fix this is to move the path import to the end of the node module.
You may defer the import, for example in a/__init__.py: def my_function(): from a.b.c import Blah return Blah() that is, defer the import until it is really needed. However, I would also have a close look at my package definitions/uses, as a cyclic dependency like the one pointed out might indicate a design problem.
I think the answer by jpmc26, while by no means wrong, comes down too heavily on circular imports. They can work just fine, if you set them up correctly. The easiest way to do so is to use import my_module syntax, rather than from my_module import some_object. The former will almost always work, even if … Read more