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Why does running the Flask dev server run itself twice?
...######### Restarting @ {} ###################'.format(
datetime.utcnow())
However, if you need to set up module globals, then you should instead use the @app.before_first_request decorator on a function and have that function set up such globals. It'll be called just once after every reloa...
How are Python's Built In Dictionaries Implemented?
Does anyone know how the built in dictionary type for python is implemented? My understanding is that it is some sort of hash table, but I haven't been able to find any sort of definitive answer.
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What is the difference between '/' and '//' when used for division?
...--> 2 Python 2.7
print (4/2) ----> 2.0 Python 3.5
Now if you want to have (in python 2.7) same output as in python 3.5, you can do the following:
Python 2.7.10
from __future__ import division
print (2/3) ----> 0.6666666666666666 #Python 2.7
print (4/2) ----> 2....
Cannot kill Python script with Ctrl-C
...s keep the main thread alive:
import time
while True:
time.sleep(1)
Now it will keep print 'first' and 'second' until you hit Ctrl+C.
Edit: as commenters have pointed out, the daemon threads may not get a chance to clean up things like temporary files. If you need that, then catch the Keyboa...
@UniqueConstraint annotation in Java
I have a Java bean. Now, I want to be sure that the field should be unique.
8 Answers
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No Swipe Back when hiding Navigation Bar in UINavigationController
..., so things are gonna get ugly. It looks like in iOS 13.4 this behavior is now controlled by a private method _gestureRecognizer:shouldReceiveEvent: (not to be confused with the new public shouldReceive method added in iOS 13.4).
I found that other posted solutions overriding the delegate, or set...
AngularJS : Factory and Service? [duplicate]
...ass this service into your controller, those properties on the object will now be available in that controller through your factory. (Hypothetical Scenario)
Singleton and will only be created once
Reusable components
Factory are a great way for communicating between controllers like sharing data.
C...
How to extract the decision rules from scikit-learn decision-tree?
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@Daniele, do you know how the classes are ordered? I would guess alphanumeric, but I haven't found confirmation anywhere.
– IanS
Sep 4 '15 at 8:27
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Syntax error on print with Python 3 [duplicate]
..., print became a function. This means that you need to include parenthesis now like mentioned below:
print("Hello World")
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What is the difference between class and instance attributes?
...nce you get that, nothing complicated is happening here.
Hopefully it's now obvious why Alex used a list: the fact that you can mutate a list means it's easier to show that two variables name the same list, and also means it's more important in real-life code to know whether you have two lists or...