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Prepend a level to a pandas MultiIndex
...I think this is a more general solution:
# Convert index to dataframe
old_idx = df.index.to_frame()
# Insert new level at specified location
old_idx.insert(0, 'new_level_name', new_level_values)
# Convert back to MultiIndex
df.index = pandas.MultiIndex.from_frame(old_idx)
Some advantages over t...
Nodejs Event Loop
...event loop operations. It's written originally for *nix systems. Libev provides a simple yet optimized event loop for the process to run on. You can read more about libev here.
LibEio is a library to perform input output asynchronously. It handles file descriptors, data handlers, sockets etc. You ca...
super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Add a new element to an array without specifying the index in Bash
...is syntax first appeared in version 3.1-alpha1.
– David Yaw
Jan 3 '14 at 21:17
41
@Jas: To access...
Resizing UITableView to fit content
...
Where exactly did you specify the height? Did you make a call to reloadData and resize it afterwords?
– James
Oct 25 '12 at 18:57
...
What does the star operator mean, in a function call?
...
What happens if you (accidentally perhaps :p) unpack a dictionary with only one * instead of two? It seems to do something, it seems like a tuple comes out, but it is not so obvious what it is. (edit: ok I think the answer is that it just unpacks th...
How to specify function types for void (not Void) methods in Java8?
...patible with that you are looking for:
interface Consumer<T> {
void accept(T t);
}
As such, Consumer is compatible with methods that receive a T and return nothing (void). And this is what you want.
For instance, if I wanted to display all element in a list I could simply create a consu...
How can I open several files at once in Vim?
... Once the files are opened use :tab all to put them in individual tabs.
– Backlin
Jun 24 '14 at 7:49
"A...
What's the meaning of 'origin' in 'git push origin master'
...med origin, which doesn't have any special technical meaning, it's just a widely used default name for an original remote repository. You can use foobar instead of origin if you like.
– skuro
Aug 25 '12 at 0:21
...
How do I add a path to PYTHONPATH in virtualenv
...
You can usually avoid having to do anything with PYTHONPATH by using .pth files. Just put a file with a .pth extension (any basename works) in your virtualenv's site-packages folder, e.g. lib\python2.7\site-packages, with the absolute path to t...