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Selecting/excluding sets of columns in pandas [duplicate]
I would like to create views or dataframes from an existing dataframe based on column selections.
9 Answers
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Python + Django page redirect
...o 1.5. Use 'RedirectView' instead: docs.djangoproject.com/en/1.5/ref/class-based-views/base/…
– Yonatan
Apr 29 '13 at 23:42
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... to head.
A performance comparison is made.
POSIX-compliant function based on awk, sort, and cut, adapted from the OP's own answer:
shuf() { awk 'BEGIN {srand(); OFMT="%.17f"} {print rand(), $0}' "$@" |
sort -k1,1n | cut -d ' ' -f2-; }
Perl-based function - adapted from Moo...
What is the __DynamicallyInvokable attribute for?
... comment on the OP's Q - one case where the CLR seems to be doing trickery based on this is in the handling 'slight' moves of methods (e.g. down one level onto a new base class) under unification
– Ruben Bartelink
Feb 13 '13 at 13:29
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How to “perfectly” override a dict?
... write an object that behaves like a dict quite easily with ABCs (Abstract Base Classes) from the collections.abc module. It even tells you if you missed a method, so below is the minimal version that shuts the ABC up.
from collections.abc import MutableMapping
class TransformedDict(MutableMappi...
What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First?
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properties that are persisted.
Finally, you must declare collection
based relationship navigation
properties as ICollection<T> only.
They cannot be a concrete
implementation or another interface
that derives from ICollection<T> (a
difference from the Deferred Loading
p...
Start an Activity with a parameter
...e do not control the Intent which launches the Activity.
You can create a base-class Activity that has a constructor with a parameter, then a derived class that has a default constructor which calls the base-class constructor with a value, as so:
class BaseActivity extends Activity
{
public Ba...
How to join absolute and relative urls?
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es = ['http://127.0.0.1', 'test1', 'test4', 'test6.xml']
base = ''
map(lambda e: urlparse.urljoin(base, e), es)
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Check if a string contains an element from a list (of strings)
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Instead of Contains I'd use StartsWith based on his examples.
– tvanfosson
Feb 1 '09 at 15:01
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Spring .properties file: get element as an Array
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If you define your array in properties file like:
base.module.elementToSearch=1,2,3,4,5,6
You can load such array in your Java class like this:
@Value("${base.module.elementToSearch}")
private String[] elementToSearch;
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