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Is there shorthand for returning a default value if None in Python? [duplicate]
...s also returns "default" if x is any falsy value, including an empty list, 0, empty string, or even datetime.time(0) (midnight).
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Changing a specific column name in pandas DataFrame
...columns = {'two':'new_name'})
In [28]: df
Out[28]:
one three new_name
0 1 a 9
1 2 b 8
2 3 c 7
3 4 d 6
4 5 e 5
Following is the docstring for the rename method.
Definition: df.rename(self, index=None, columns=None, co...
What is C# analog of C++ std::pair?
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330
Tuples are available since .NET4.0 and support generics:
Tuple<string, int> t = new Tuple...
Retrieving the last record in each group - MySQL
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1021
MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With ...
What do 'lazy' and 'greedy' mean in the context of regular expressions?
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Mibac
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answered Feb 20 '10 at 6:22
SampsonSampson
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Method Resolution Order (MRO) in new-style classes?
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answered Dec 4 '09 at 18:03
Alex MartelliAlex Martelli
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git stash blunder: git stash pop and ended up with merge conflicts
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edited Jun 20 at 9:12
Community♦
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answered May 15 '10 at 16:56
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What are file descriptors, explained in simple terms?
...at file and store the information about that opened file. So if there are 100 files opened in your OS then there will be 100 entries in OS (somewhere in kernel). These entries are represented by integers like (...100, 101, 102....). This entry number is the file descriptor.
So it is just an integer ...
What does jquery $ actually return?
...et like an
array or access individual elements
via the indexer ($(sel)[0] for
example). More importantly, you can
also apply jQuery functions against
all the selected elements.
About returning nothing:
Does it always return an array? Does it return null?
You always get the same thi...
how to get the cookies from a php curl into a variable
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edited May 7 '15 at 13:50
answered May 21 '09 at 23:55
TM...