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__getattr__ on a module
...getattr__(name: str) -> Any:
...
This will also allow hooks into "from" imports, i.e. you can return dynamically generated objects for statements such as from my_module import whatever.
On a related note, along with the module getattr you may also define a __dir__ function at module level ...
How to read/process command line arguments?
...solution in the standard library is argparse (docs):
Here is an example:
from argparse import ArgumentParser
parser = ArgumentParser()
parser.add_argument("-f", "--file", dest="filename",
help="write report to FILE", metavar="FILE")
parser.add_argument("-q", "--quiet",
...
ping response “Request timed out.” vs “Destination Host unreachable”
...ce between Request timed out and Destination host unreachable returned from the command?
4 Answers
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Can you remove elements from a std::list while iterating through it?
...+) and then remove the previous element (e.g., by using the returned value from i++). You can change the code to a while loop like so:
std::list<item*>::iterator i = items.begin();
while (i != items.end())
{
bool isActive = (*i)->update();
if (!isActive)
{
items.erase(...
How to break out of a loop from inside a switch?
...erstand the terminating clause.
Loops that repeat forever prevent the user from terminating the program from within the program.
Is inefficient.
There are multiple loop termination conditions, including checking for "true".
Is prone to bugs.
Cannot easily determine where to put code that will ...
Spring MVC - How to get all request params in a map in Spring controller?
...
If you are looking to process list values, like from a group of checkboxes with the same name, use: @RequestParam MultiValueMap<String, String>
– IcedDante
Jan 5 '15 at 17:11
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How to import a class from default package
...
From the Java language spec:
It is a compile time error to import a type from the unnamed package.
You'll have to access the class via reflection or some other indirect method.
...
C# catch a stack overflow exception
... Starting with 2.0 ..., I'm curios, what is preventing them from catching SO and how it was possible 1.1 (you mentioned that in your comment)?
– M.kazem Akhgary
Oct 24 '17 at 16:54
...
How to jump to a particular line in a huge text file?
...
linecache:
The linecache module allows one to get any line from a Python source file, while attempting to optimize internally, using a cache, the common case where many lines are read from a single file. This is used by the traceback module to retrieve source lines for inclusion in t...
Getting a slice of keys from a map
Is there any simpler/nicer way of getting a slice of keys from a map in Go?
6 Answers
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