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How do I initialize the base (super) class?
... supports "old-style" and new-style classes. New-style classes are derived from object and are what you are using, and invoke their base class through super(), e.g.
class X(object):
def __init__(self, x):
pass
def doit(self, bar):
pass
class Y(X):
def __init__(self):
super(Y, se...
What's the best way to put a c-struct in an NSArray?
...e don't need a pointer to the values to be stored within. This is distinct from the immutable array wherein the contents are "frozen" at creation and hence values must be passed to the initialisation routine.
– Sedate Alien
Dec 30 '10 at 1:11
...
Python constructors and __init__
...ed called "Constructors"? What is their purpose and how are they different from methods in a class?
5 Answers
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List comprehension on a nested list?
...s I would like to keep elements per list to be 10 and vary number of lists from 10-100,000
>>> python -m timeit "[list(map(float,k)) for k in [list(range(0,10))]*10]"
>>> 100000 loops, best of 3: 15.2 usec per loop
>>> python -m timeit "[[float(y) for y in x] for x in ...
Pretty-print an entire Pandas Series / DataFrame
...ny columns do you have? I've checked with 1300 columns and it work fine: from itertools import combinations from string import ascii_letters df = pd.DataFrame(data=[[0]*1326], index=[0], columns=[(a+b) for a,b in combinations(ascii_letters, 2)])
– Andrey Shokhin
...
How can I return NULL from a generic method in C#?
...that if you're using this generic method to say, convert a Database object from DbNull to Int and it returns default(T) where T is an int, it'll return 0. If this number is actually meaningful, then you'd be passing around bad data in cases where that field was null. Or a better example would be a D...
Django - how to create a file and save it to a model's FileField?
...solution, but here is the way I went about generating a CSV and serving it from a view.
Thought it was worth while putting this here as it took me a little bit of fiddling to get all the desirable behaviour (overwrite existing file, storing to the right spot, not creating duplicate files etc).
Dja...
How to detect scroll position of page using jQuery
...s its scroll position and at the change calls a few functions to load data from the server.
9 Answers
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Troubleshooting “The use statement with non-compound name … has no effect”
...atement, because its arguments are always seen as absolute (i.e., starting from the global namespace). 2) use Blog; is not necessarily useless: for example, from a file namespaced as Blog\Util\CLI, it would enable you to write Blog\Entry::method() instead of \Blog\Entry::method(). Not that this is r...
What is the difference between square brackets and parentheses in a regex?
...on capturing group.
[abc] is a "character class" that means "any character from a,b or c" (a character class may use ranges, e.g. [a-d] = [abcd])
The reason these regexes are similar is that a character class is a shorthand for an "or" (but only for single characters). In an alternation, you can a...