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Pandas - How to flatten a hierarchical index in columns
...g entries in your columns) you could:
df.columns = [' '.join(col).strip() for col in df.columns.values]
Note: we must strip the whitespace for when there is no second index.
In [11]: [' '.join(col).strip() for col in df.columns.values]
Out[11]:
['USAF',
'WBAN',
'day',
'month',
's_CD sum',
...
Scala: List[Future] to Future[List] disregarding failed futures
I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result] , but to make things simpler, let's just say Future[List[Int]] The normal way to do this would be to use Future.sequence(...) ...
Bring element to front using CSS
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good point about all elements must have z-index for it to work. thanks!
– Salah Saleh
Feb 19 '16 at 18:48
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Programmatically generate video or animated GIF in Python?
...t I want to create a video from. Ideally I could specify a frame duration for each frame but a fixed frame rate would be fine too. I'm doing this in wxPython, so I can render to a wxDC or I can save the images to files, like PNG. Is there a Python library that will allow me to create either a vid...
Specifying rails version to use when creating a new application
... You should change this to the accepted answer since it works for Rails 2 and 3. Keltia's answer will no longer work if you have Rails 3 installed and want a Rails 2 app.
– Peter Brown
Feb 6 '11 at 15:03
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Regex Named Groups in Java
It is my understanding that the java.regex package does not have support for named groups ( http://www.regular-expressions.info/named.html ) so can anyone point me towards a third-party library that does?
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How to get indices of a sorted array in Python
...ing like next:
>>> myList = [1, 2, 3, 100, 5]
>>> [i[0] for i in sorted(enumerate(myList), key=lambda x:x[1])]
[0, 1, 2, 4, 3]
enumerate(myList) gives you a list containing tuples of (index, value):
[(0, 1), (1, 2), (2, 3), (3, 100), (4, 5)]
You sort the list by passing it to...
node.js global variables?
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Could you provide a little bit more information please? Is this part of javascript or part of node? Is it a good pattern to follow? As in should I do this or should I use express set? Thanks
– Harry
Mar 28 '11 at 3:34
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Python: Bind an Unbound Method?
...t to have calls to magic functions in my code (i.e. __get__). I don't know for which version of python this you tested this on, but on python 3.4, the MethodType function takes two arguments. The function and the instance. So this should be changed to types.MethodType(f, C()).
–...
How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
... Wow. This is a good trick. This also explains why tile-servers for map engines create a number of fake sub-domains (typically something like maps1.whatever.com, maps2.whatever.com, maps3.whatever.com) to accelerate things.
– meawoppl
May 23 '13 at 1...