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Get class name of django model
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Instead of doing Book.__class__.__name__ on class itself, if you do it over a book object, then book_object.__class__.__name__ will give you 'Book' (i.e the name of the model)
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What is 'Pattern Matching' in functional languages?
...a functional language, the datatypes that you define are usually what are known as discriminated unions or algebraic data types. For instance, what's a (linked) list? A linked list List of things of some type a is either the empty list Nil or some element of type a Consed onto a List a (a list of...
Using os.walk() to recursively traverse directories in Python
..._recurse(self, parent_path, file_list, prefix, output_buf, level):
if len(file_list) == 0 \
or (self.max_level != -1 and self.max_level <= level):
return
else:
file_list.sort(key=lambda f: os.path.isfile(os.path.join(parent_path, f)))
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Calling a class function inside of __init__
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If I'm not wrong, both functions are part of your class, you should use it like this:
class MyClass():
def __init__(self, filename):
self.filename = filename
self.stat1 = None
self.stat2 = None
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How to find out what type of a Mat object is with Mat::type() in OpenCV
I am kind of confused with type() method of Mat object in OpenCV. If I have following lines:
6 Answers
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How do I extend a class with c# extension methods?
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{
public static DateTime Tomorrow
{
get { return DateTime.Now.AddDays(1); }
}
}
Which you would use like this:
DateTime tomorrow = DateTimeHelper.Tomorrow;
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Get exception description and stack trace which caused an exception, all as a string
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See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
raise ValueError
except ValueError:
tb = traceback.format_exc()
else:
tb = "No error"
finally:
print tb
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multiprocessing: How do I share a dict among multiple processes?
...essing import Process, Manager
def f(d):
d[1] += '1'
d['2'] += 2
if __name__ == '__main__':
manager = Manager()
d = manager.dict()
d[1] = '1'
d['2'] = 2
p1 = Process(target=f, args=(d,))
p2 = Process(target=f, args=(d,))
p1.start()
p2.start()
p1.join()...
PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...hat’s probably everyone’s first thought. But it’s a little bit more difficult. See Chris Shiflett’s article SERVER_NAME Versus HTTP_HOST.
It seems that there is no silver bullet. Only when you force Apache to use the canonical name you will always get the right server name with SERVER_NAME....
UIPanGestureRecognizer - Only vertical or horizontal
...omeView];
return fabs(velocity.y) > fabs(velocity.x);
}
And for Swift:
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIPanGestureRecognizer) -> Bool {
let velocity = gestureRecognizer.velocity(in: someView)
return abs(velocity.x) > abs(velocity.y)
}
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