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Creating a singleton in Python
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class Logger(object):
__metaclass__ = Singleton
Or in Python3
class Logger(metaclass=Singleton):
pass
If you want to run __init__ every time the class is called, add
else:
cls._instances[cls].__init__(*args, **kwargs)
to the if statement in Singleton.__call__...
How to access pandas groupby dataframe by key
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In [21]: gb.get_group('foo')
Out[21]:
A B C
0 foo 1.624345 5
2 foo -0.528172 11
4 foo 0.865408 14
Note: This doesn't require creating an intermediary dictionary / copy of every subdataframe for every group, so will be much more memory-efficient that creating the naive di...
UITextView that expands to text using auto layout
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30
The view containing UITextView will be assigned its size with setBounds by AutoLayout. So, this...
The remote end hung up unexpectedly while git cloning
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36 Answers
36
Active
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How can I list ALL grants a user received?
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DCookieDCookie
38.6k1111 gold badges7373 silver badges8585 bronze badges
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Getting the first index of an object
...ted.
– Ryan Florence
May 27 '09 at 23:02
1
If you know that the object has only one element, then...
What is the correct value for the disabled attribute?
...kup.
For HTML5, <input type="text" disabled /> is valid and used by W3C on their samples.
In fact, both ways works on all major browsers.
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How to create file execute mode permissions in Git on Windows?
...add foo.sh
C:\Temp\TestRepo>git ls-files --stage
100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0 foo.sh
As you note, after adding, the mode is 0644 (ie, not executable). However, we can mark it as executable before committing:
C:\Temp\TestRepo>git update-index --chmod=+x foo.sh
C...
How do you keep user.config settings across different assembly versions in .net?
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238
ApplicationSettingsBase has a method called Upgrade which migrates all settings from the previo...