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Why is “if not someobj:” better than “if someobj == None:” in Python?
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In the first test, Python try to convert the object to a bool value if it is not already one. Roughly, we are asking the object : are you meaningful or not ? This is done using the following algorithm :
If the object has a __nonzero__ special method (as do numeric built-ins, int and float),...
How to host a Node.Js application in shared hosting [closed]
....6.0, proxy-addr@1.0.8, send@0.12.3, type-is@1.6.2, accepts@1.2.7)
I can now use the commands:
# ~/node/bin/node -v
v0.12.4
# ~/node/bin/npm -v
2.10.1
For security reasons, I have renamed my node directory to something else.
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Purpose of Python's __repr__
What is the significance/purpose of this method?
7 Answers
7
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filename and line number of python script
... @gsinha: Every function call has performance impact. You have to measure if this impact is acceptable for you.
– omikron
Nov 9 '15 at 14:45
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?
... licensing fees, solid reputation and support, etc. That is where I start nowadays.
Most applications/systems choose lots of fancy J2EE features when all they really need is servlets and JDBC with some decent architecture/design. Question why you think you need more.
Of the full-blown containers...
Plot correlation matrix into a graph
I have a matrix with some correlation values. Now I want to plot that in a graph that looks more or less like that:
11 Answ...
How can you set class attributes from variable arguments (kwargs) in python
...s = {'a', 'b', 'c'}
self.__dict__.update((k, v) for k, v in kwargs.items() if k in allowed_keys)
you could filter the keys beforehand (use iteritems instead of items if you’re still using Python 2.x).
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What is the difference between an interface and abstract class?
... interface does not have an implementation for a method is no longer valid now.
Refer to this documentation page for more details.
Have a look at this SE question for code examples to understand better.
How should I have explained the difference between an Interface and an Abst
Confused about __str__ on list in Python [duplicate]
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Python has two different ways to convert an object to a string: str() and repr(). Printing an object uses str(); printing a list containing an object uses str() for the list itself, but the implementation of list.__str__() calls repr() for ...
How can I get the version defined in setup.py (setuptools) in my package?
...ire("MyProject")[0].version
Store version string for use during install
If you want to go the other way 'round (which appears to be what other answer authors here appear to have thought you were asking), put the version string in a separate file and read that file's contents in setup.py.
You cou...