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AttributeError: 'module' object has no attribute
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You have mutual top-level imports, which is almost always a bad idea.
If you really must have mutual imports in Python, the way to do it is to import them within a function:
# In b.py:
def cause_a_to_do_something():
import a
a.do_something()
Now a.py can safely do import b wit...
Difference between Covariance & Contra-variance
...and I rephrased following examples.
What does “consistency” mean? The idea is to design type-safe type hierarchies with highly substitutable types. The key to get this consistency is sub type based conformance, if you work in a statically typed language. (We'll discuss the Liskov Substitution P...
What is the difference between the kernel space and the user space?
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@roottraveller: I'm not sure what gave you that idea, but no, not at all. At the same time, a user-space process will normally have some (more or less hidden) kernel-space memory, so (for example) your process will have a user-space stack, and a kernel-space stack that's u...
Get full path of the files in PowerShell
...that I should probably have started source control on it, but I can get an idea of my first commit against "master" by getting files since installation: Get-ChildItem -Path 'C:\Program Files\TheProgram' -Recurse | Where-Object -FilterScript {($_.LastWriteTime -gt '2020-03-01')} | Select-Object FullN...
How can I trigger an onchange event manually? [duplicate]
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Andy E, this does not work in IE10, any ideas?
– Nick Binnet
Jul 23 '13 at 8:43
1
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How to make my custom type to work with “range-based for loops”?
...Doing so in a way that isn't compatible with an iterator is probably a bad idea, as future iterations of C++ might be relatively cavalier about breaking your code if you do.
As an aside, it is reasonably likely that a future revision of the standard will permit end_expr to return a different type th...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...lication. You can reuse it in different applications, so it’s not a good idea to couple it with the View of a single application, where you want to show it, because usually in the different applications you have different views. So it’s a good idea to use publish/subscribe for the Model-View com...
How do you create a dictionary in Java? [closed]
...ithout it: add context around the link so your fellow users will have some idea what it is and why it’s there, then quote the most relevant part of the page you're linking to in case the target page is unavailable. Answers that are little more than a link may be deleted.
– Fe...
Case objects vs Enumerations in Scala
... patterns.
To start, let's make sure we are working from the same basic idea of what an enumeration is. Let's define an enumeration mostly in terms of the Enum provided as of Java 5 (1.5):
It contains a naturally ordered closed set of named members
There is a fixed number of members
Membe...
Read/write files within a Linux kernel module
...you should avoid file I/O from within Linux kernel when possible. The main idea is to go "one level deeper" and call VFS level functions instead of the syscall handler directly:
Includes:
#include <linux/fs.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/b...