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When to use nested classes and classes nested in modules?
I'm pretty familiar with when to use subclasses and modules, but more recently I've been seeing nested classes like this:
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How to check whether a pandas DataFrame is empty?
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You can use the attribute df.empty to check whether it's empty or not:
if df.empty:
print('DataFrame is empty!')
Source: Pandas Documentation
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What is __init__.py for?
What is __init__.py for in a Python source directory?
12 Answers
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Tricky Google interview question
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edited Aug 19 '14 at 18:58
Will Ness
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Which is faster in Python: x**.5 or math.sqrt(x)?
I've been wondering this for some time. As the title say, which is faster, the actual function or simply raising to the half power?
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C++ Redefinition Header Files (winsock2.h)
...the in MyClass.h and then I'm including MyClass.h in many files, so it includes multiple times and redefinition error occurs. How to prevent?
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What is the convention for word separator in Java package names?
...scribes:
Packages
The prefix of a unique package name is always written in all-lowercase ASCII letters and should be one of the top-level domain names, currently com, edu, gov, mil, net, org, or one of the English two-letter codes identifying countries as specified in ISO Standard 3166, 198...
Is it possible to await an event instead of another async method?
... kicks off a long-running process. So, as recommended, I'm using async/await to make sure the UI thread doesn't get blocked:
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UICollectionView's cellForItemAtIndexPath is not being called
Only my second time using UICollectionView's and perhaps I have bitten off more than I can chew but nevertheless:
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Linux equivalent of the Mac OS X “open” command [closed]
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You could try xdg-open, most Linux distros have it. It will open default associated app for your file.
FYI https://portland.freedesktop.org/doc/xdg-open.html
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