¡@
python Programming Glossary: costhttp://stackoverflow.com/questions/1061283/lt-instead-of-cmp be microscopically faster at runtime at equally minute cost in terms of memory . Of course if your class has some particularly..
Shared-memory objects in python multiprocessing http://stackoverflow.com/questions/10721915/shared-memory-objects-in-python-multiprocessing fork is copy on write we should not invoke any additional cost when spawning new processes in python multiprocessing library... overhead time.time t output and by the way the cost increases as the size of the array increases so I suspect there..
http://stackoverflow.com/questions/1115313/cost-of-len-function of len function What is the cost of len function for Python built ins Is it same for all built..
Should Python import statements always be at the top of a module? http://stackoverflow.com/questions/128478/should-python-import-statements-always-be-at-the-top-of-a-module at the top of the module is fine because it's a trivial cost that's only paid once. Putting the imports within a function..
Python string 'join' is faster(?) than '+', but what's wrong here? http://stackoverflow.com/questions/1349311/python-string-join-is-faster-than-but-whats-wrong-here irrelevant 20 gains by using the wrong idiom... at the cost once in a while and from their POV out of the blue of being..
http://stackoverflow.com/questions/15112125/if-x-or-y-or-z-blah 1 in x y z using a set to take advantage of the constant cost membership test in takes a fixed amount of time whatever the..
Can't set attributes of object class http://stackoverflow.com/questions/1529002/cant-set-attributes-of-object-class can have arbitrary attributes but you pay quite a space cost for that flexibility. So what if you wanted int s with just..
Find unique rows in numpy.array http://stackoverflow.com/questions/16970982/find-unique-rows-in-numpy-array EDIT The above can be slightly sped up perhaps at the cost of clarity by doing unique_a np.unique b .view a.dtype .reshape..
http://stackoverflow.com/questions/1835756/using-try-vs-if-in-python 0 n 1 0 0.06740950436199 So whereas an if statement always costs you it's nearly free to set up a try except block. But when.. except block. But when an Exception actually occurs the cost is much higher. Moral It's perfectly OK and pythonic to use..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images sensors pollute the image with some amount of noise. Low cost sensors have more noise. You may wish to apply some noise reduction..
What are the differences between Perl, Python, AWK and sed? [closed] http://stackoverflow.com/questions/366980/what-are-the-differences-between-perl-python-awk-and-sed tasks. You can work minor miracles with it but at a cost to the hair on your head. However it is probably the fastest..
check if all elements in a list are identical http://stackoverflow.com/questions/3844801/check-if-all-elements-in-a-list-are-identical to be @KennyTM checkEqual1 . It pays however a significant cost for this up to 20x in performance nearly identical lists up..
convert a string of bytes into an int (python) http://stackoverflow.com/questions/444591/convert-a-string-of-bytes-into-an-int-python y xcc xa6 xbb 0 .timeit 0.98822188377380371 Including the cost of importing the module negates almost all of the advantage.. proportionally less of an issue. It's also probably i o cost rather than cpu so it may depend on the capacity and load characteristics..
Iterate a list as pair (current, next) in Python http://stackoverflow.com/questions/5434891/iterate-a-list-as-pair-current-next-in-python can advance independently of each other but it comes at a cost. If one of the iterators advances further than the other then..
How do I profile memory usage in Python? [duplicate] http://stackoverflow.com/questions/552744/how-do-i-profile-memory-usage-in-python usage so I can explore those tradeoffs as well e.g. the cost of caching a table of previously computed values versus recomputing..
FSharp runs my algorithm slower than Python! http://stackoverflow.com/questions/5850243/fsharp-runs-my-algorithm-slower-than-python SLOWER than Python's interpreted code I know about startup costs of VMs mono in this case and how JITs improve things for languages.. .NET does little to optimize virtual dispatch away and the cost of virtual dispatch is extremely high on modern hardware because..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields fields with any relational database backend. But at what cost Will stability of application suffer upon heavy use These are..
http://stackoverflow.com/questions/1115313/cost-of-len-function of len function What is the cost of len function for Python..
Cost of scaling Rails vs cost of scaling PHP vs Python frameworks http://stackoverflow.com/questions/1163012/cost-of-scaling-rails-vs-cost-of-scaling-php-vs-python-frameworks of scaling Rails vs cost of scaling PHP vs Python frameworks..
Cost of exception handlers in Python http://stackoverflow.com/questions/2522005/cost-of-exception-handlers-in-python of exception handlers in Python In another question the accepted..
Finding an optimal solution that minimizes a constraint? http://stackoverflow.com/questions/7927787/finding-an-optimal-solution-that-minimizes-a-constraint Sx takes a shot at time k S1 at t 1 S1 at t 2 S1 at t 3 Cost 3 shots 3 time units 6 S1 at t 2 S1 at t 3 Cost 2 shots 3 time.. S1 at t 3 Cost 3 shots 3 time units 6 S1 at t 2 S1 at t 3 Cost 2 shots 3 time units 5 S1 at t 1 S3 at t 2 Cost 2 shots 2 time.. S1 at t 3 Cost 2 shots 3 time units 5 S1 at t 1 S3 at t 2 Cost 2 shots 2 time units 4 S3 at t 4 Cost 1 shot 4 time units 5..
How do I make my implementation of greedy set cover faster? http://stackoverflow.com/questions/7942312/how-do-i-make-my-implementation-of-greedy-set-cover-faster set 1 2 3 4 w 1 1 2 2 2 3 3 4 4 C costs def findMin S R minCost 99999.0 minElement 1 for i s in enumerate S try cost w i len.. enumerate S try cost w i len s.intersection R if cost minCost minCost cost minElement i except # Division by zero ignore.. S try cost w i len s.intersection R if cost minCost minCost cost minElement i except # Division by zero ignore pass return..
Combining 2 .csv files by common column http://stackoverflow.com/questions/826812/combining-2-csv-files-by-common-column Category Buy URL Product Name Availability Shipping Cost Condition MPID Image URL UPC Description and then rest of every..
|