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pandas GroupBy columns with NaN (missing) values
... from pandas 1.1 you have better control over this behavior, NA values are now allowed in the grouper using dropna=False
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How to change a module variable from another module?
...till live in different namespaces: in __init__.py, they are bar.a and a).
Now, when you do
import bar
print bar.a
you are accessing variable bar/__init__.py:a (since import bar imports your bar/__init__.py). This is the variable you modify (to 1). You are not touching the contents of variable ...
What is the official “preferred” way to install pip and virtualenv systemwide?
...
If you can install the latest Python (2.7.9 and up) Pip is now bundled with it.
See: https://docs.python.org/2.7//installing/index.html
If not :
Update (from the release notes):
Beginning with v1.5.1, pip does not require setuptools prior to running get-pip.py. Additionally, if ...
Is there a read-only generic dictionary available in .NET?
...d too, but at least with the interface it shouldn't be difficult to create now an implementation which exposes an official .NET generic interface :)
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Using variables inside a bash heredoc
... this was down-voted, but it adds a valid note which is not covered in the now higher voted answer.
– Inian
Jan 30 '19 at 7:16
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When to use EntityManager.find() vs EntityManager.getReference() with JPA
...etter method). Just to change state (I mean setter method). As you should know, getReference returns a proxy object which uses a powerful feature called automatic dirty checking. Suppose the following
public class Person {
private String name;
private Integer age;
}
public class PersonS...
How to compare arrays in JavaScript?
...rent types => not equal
return false;
}
}
//Now a deeper check using other objects property names
for(propName in object2) {
//We must check instances anyway, there may be a property that only exists in object2
//I wonder, if remembering the che...
Getting visitors country from their IP
I want to get visitors country via their IP... Right now I'm using this ( http://api.hostip.info/country.php?ip= ...... )
2...
Are PHP Variables passed by value or by reference?
... $str would be assigned null, in your case.
– The Unknown Dev
Jan 22 '15 at 19:31
if you do it this way @ObmerkKronen ...
C++ sorting and keeping track of indexes
...p;v](size_t i1, size_t i2) {return v[i1] < v[i2];});
return idx;
}
Now you can use the returned index vector in iterations such as
for (auto i: sort_indexes(v)) {
cout << v[i] << endl;
}
You can also choose to supply your original index vector, sort function, comparator, or ...