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What is the most efficient way to loop through dataframes with pandas? [duplicate]
... loop through a pandas DataFrame to perform something, like me, I found at least three ways to do it. I have done a short test to see which one of the three is the least time consuming.
t = pd.DataFrame({'a': range(0, 10000), 'b': range(10000, 20000)})
B = []
C = []
A = time.time()
for i,r in t.ite...
Insert line break inside placeholder attribute of a textarea?
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@amosrivera LOL, at least you can laugh about it, right? Nothing lost by trying... :]
– Tieson T.
Sep 7 '11 at 6:03
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How to get UTC time in Python?
...hat strftime("%s") is platform dependent and does not work on Windows. (At least it doesn't for me on Windows 10).
– Julian Kirsch
Dec 31 '19 at 2:21
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Is there a way to get the git root directory in one command?
...t;path>]: "If no path is given, git will print the current setting"; at least, IMO, it'd be a logical place to look for such a feature.
– imz -- Ivan Zakharyaschev
Dec 4 '12 at 12:52
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Check if a string matches a regex in Bash script
...mber of leading characters that matched and the exit status is true iff at least 1 character was matched. This is why an empty string (that matches 0 characters) has an exit status of false. For example expr match "abcdefghi" "^" && echo Matched || echo No match -- and expr match "abcdefghi"...
Why doesn't git recognize that my file has been changed, therefore git add not working
...ib/, what makes git ignore this folder. There is no problem with that - at least if this folder is not the main folder from your project, like what happened to me.
– Paladini
May 13 '17 at 22:18
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Numpy index slice without losing dimension information
...ther wouldn't work or would be much more difficult to implement.
(Or at least that's my guess at the numpy dev's reasoning behind dropping dimension info when slicing)
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Is it possible to execute code once before all tests run?
...-decorated method must be in a TestClass-decorated class which contains at least one TestMethod-decorated method, otherwise it will not be executed!
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Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
...ackoverflow.com/questions/24007050/… - it conflicts with this answer (at least the "or even lower" part).
– rmaddy
Jun 3 '14 at 4:52
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void in C# generics?
...e a small price to pay.
This inability to use void as a return type is at least partially responsible for a split between the Func<...> and Action<...> families of generic delegates: had it been possible to return void, all Action<X,Y,Z> would become simply Func<X,Y,Z,void>....