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Create Pandas DataFrame from a string
... to the pandas.read_csv function. E.g:
import sys
if sys.version_info[0] < 3:
from StringIO import StringIO
else:
from io import StringIO
import pandas as pd
TESTDATA = StringIO("""col1;col2;col3
1;4.4;99
2;4.5;200
3;4.7;65
4;3.2;140
""")
df = pd.read_csv(TESTDATA...
How do I access the command history from IDLE?
...to get the last command, and edit it, and press ENTER again to see the result.
5 Answers
...
_=> what does this underscore mean in Lambda expressions?
... Is it a coordinate in space?".
Consider the following case:
Initialize<Client> ( _=>_.Init() );
Used with a Generics call, the underscore in this case works as a "bypass symbol". It avoids redundancy, defining that the type of the argument is obvious and can be infered from usage - jus...
Design Patterns: Abstract Factory vs Factory Method
...pose) is that the Abstract Factory can enforce a common theme across its multiple products.
Can the Factory Method concrete creator be created from an Interface or does it have to be from a class? (classes defer
instantiations to subclasses)
First, we must note that neither Java nor C#...
lenses, fclabels, data-accessor - which library for structure access and mutation is better
...
newtype Lens s t = Lens (forall a. State t a -> State s a)
As a result, I rather don't like this approach, as it needlessly yanks you out of Haskell 98 (if you want a type to provide to your lenses in the abstract) and deprives you of the Category instance for lenses, which would let you comp...
Proper way to catch exception from JSON.parse
... answered Dec 17 '10 at 3:08
UltraInstinctUltraInstinct
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...
git cherry-pick not working
... the current production branch. However, when I execute git cherry-pick <SHA-hash> , I just get this message:
4 Ans...
What is the ultimate postal code and zip regex?
I'm looking for the ultimate postal code and zip code regex. I'm looking for something that will cover most (hopefully all) of the world.
...
generate model using user:references vs user_id:integer
...You need to manually put the line in the Micropost model
class Micropost < ActiveRecord::Base
belongs_to :user
end
class User < ActiveRecord::Base
has_many :microposts
end
the keywords belongs_to and has_many determine the relationship between these models and declare user_id as a fore...
Mocking static methods with Mockito
...s under test can use this singleton object by, for example,
having a default constructor for real life use:
public class SomeClassUnderTest {
final Slf4jMdcWrapper myMockableObject;
/** constructor used by CDI or whatever real life use case */
public myClassUnderTestContructor() {
...