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How do I raise the same Exception with a custom message in Python?
...ocs.python.org/2/library/exceptions.html - "exception EnvironmentError The base class for exceptions that can occur outside the Python system: IOError, OSError. When exceptions of this type are created with a 2-tuple, the first item is available on the instance’s errno attribute (it is assumed to ...
Using logging in multiple modules
...nce of logging library in multiple modules for me was following solution:
base_logger.py
import logging
logger = logging
logger.basicConfig(format='%(asctime)s - %(message)s', level=logging.INFO)
Other files
from base_logger import logger
if __name__ == '__main__':
logger.info("This is an...
What's the difference between Spring Data's MongoTemplate and MongoRepository?
...yourCustomMethod() {
// custom implementation here
}
}
Now let your base repository interface extend the custom one and the infrastructure will automatically use your custom implementation:
interface UserRepository extends CrudRepository<User, Long>, CustomUserRepository {
}
This w...
How can I initialize base class member variables in derived class constructor?
...{
B()
{
a = 0;
b = 0;
}
};
You can't access base members in the initializer list, but the constructor itself, just as any other member method, may access public and protected members of the base class.
...
Non-alphanumeric list order from os.listdir()
...can use the builtin sorted function to sort the strings however you want. Based on what you describe,
sorted(os.listdir(whatever_directory))
Alternatively, you can use the .sort method of a list:
lst = os.listdir(whatever_directory)
lst.sort()
I think should do the trick.
Note that the orde...
Return multiple values to a method caller
...
Working on a legacy code base, returning a custom class was a solid approach for me.
– Brant
Feb 20 at 15:54
add a comment
...
Possible to make labels appear when hovering over a point in matplotlib?
...
From http://matplotlib.sourceforge.net/examples/event_handling/pick_event_demo.html :
from matplotlib.pyplot import figure, show
import numpy as npy
from numpy.random import rand
if 1: # picking on a scatter plot (matplotlib.collections.RegularPolyCollection)
x, y, c, s = rand(4, 100)
d...
What exception classes are in the standard C++ library
...system_error> from operating system or other C API
std::ios_base::failure <ios> Input or output error
Source: http://en.cppreference.com/w/cpp/error/exception
In practice, most exceptions are custom exceptions derived from logic_error and runtime_error. Not that these are neg...
Run a callback only if an attribute has changed in Rails
...
Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github.com/rails/rails/commit/16ae3db5a5c...
No “pull” in Git Gui?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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