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python Programming Glossary: intWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python but this one is tricky. I know it has something to do with introspection but it's still unclear to me. So what are metaclasses.. object ... pass ... my_object ObjectCreator print my_object __main__.ObjectCreator object at 0x8974f2c But classes.. to it you can pass it as a function parameter e.g. print ObjectCreator # you can print a class because it's an object..
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python Returns a list of primes n sieve True n for i in xrange 3 int n 0.5 1 2 if sieve i sieve i i 2 i False n i i 1 2 i 1 return.. a list of primes n sieve True n 2 for i in xrange 3 int n 0.5 1 2 if sieve i 2 sieve i i 2 i False n i i 1 2 i 1 return.. n 2 5 n 1 n 6 sieve True n 3 sieve 0 False for i in xrange int n 0.5 3 1 if sieve i k 3 i 1 1 sieve k k 3 2 k False n 6 k k..
Python “is” operator behaves unexpectedly with integers http://stackoverflow.com/questions/306313/python-is-operator-behaves-unexpectedly-with-integers &ldquo is&rdquo operator behaves unexpectedly with integers Why does the following behave unexpectedly in Python a.. 100. Based on the above I can hypothesise that Python is internally implemented such that small integers are stored in a.. that Python is internally implemented such that small integers are stored in a different way than larger integers and..
Python rounding error with float numbers http://stackoverflow.com/questions/5997027/python-rounding-error-with-float-numbers 0 101 1 delta float idelta 100 ... filename 'foo' str int delta 100 '.dat' generated identical files for delta 0.28 and.. a systematic error not in the sense it happens to every integer. So I created the following Python script # usr bin env.. Python script # usr bin env python2.6 import sys n int sys.argv 1 for i in range 0 n 1 a int 100 float i 100 if i a..
Python faster than compiled Haskell? http://stackoverflow.com/questions/10357663/python-faster-than-compiled-haskell do file readFile data let un lines file let f map x read x Int un let done quicksort f writeFile sorted unlines map show done.. version 2.7.1 GHC version 7.0.4 Mac OSX 10.7.3 2.4GHz Intel Core i5 List generated by from random import shuffle a str.. with a function like this import Numeric fastRead String Int fastRead s case readDec s of n n I get a pretty fair speedup..
SWIG : Unable to access constructor with double pointer http://stackoverflow.com/questions/13392512/swig-unable-to-access-constructor-with-double-pointer include GradedComplex.h include GradedDouble.h template Int Item int template Complex Item std complex double I have generated..
http://stackoverflow.com/questions/2262100/rgb-int-to-rgb-python Int to RGB Python How can I convert an RGB integer to the corresponding..
http://stackoverflow.com/questions/379906/parse-string-to-float-or-int String to Float or Int In Python how can I parse a numeric string like 545.2222 to..
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell http://stackoverflow.com/questions/6964392/speed-comparison-with-project-euler-c-vs-python-vs-erlang-vs-haskell number factorCount' number isquare 1 0 fromEnum square fromIntegral isquare where square sqrt fromIntegral number isquare floor.. fromEnum square fromIntegral isquare where square sqrt fromIntegral number isquare floor square factorCount' number sqrt candidate.. floor square factorCount' number sqrt candidate count fromIntegral candidate sqrt count number `mod` candidate 0 factorCount'..
http://stackoverflow.com/questions/1017388/simple-update-in-sqlalchemy update in sqlalchemy UserTable is id INT name STR last_login DATETIME Serving a web page request i have..
http://stackoverflow.com/questions/1108918/how-to-store-an-ip-in-mysql address then your datatype in MySQL can be an UNSIGNED INT which only uses 4 bytes of storage. To store the individual.. individual octets you would only need to use UNSIGNED TINYINT datatypes not SMALLINTS which would use up 1 byte each of storage... would only need to use UNSIGNED TINYINT datatypes not SMALLINTS which would use up 1 byte each of storage. Both methods would..
http://stackoverflow.com/questions/17638087/behaviour-of-raw-input time it is going to elif . I thought comparing STRING and INT might throw exception I dont think so but just in case so I..
Passing param to DB .execute for WHERE IN… INT list http://stackoverflow.com/questions/2253494/passing-param-to-db-execute-for-where-in-int-list param to DB .execute for WHERE IN&hellip INT list With Python's DB API spec you can pass an argument of..
How to insert arrays into a database? http://stackoverflow.com/questions/3738269/how-to-insert-arrays-into-a-database of like a name a sex and an age CREATE TABLE `dogs` `id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY `name` VARCHAR.. NULL AUTO_INCREMENT PRIMARY KEY `name` VARCHAR 64 `age` INT UNSIGNED `sex` ENUM 'Male' 'Female' From there each dog has.. the 24 measurements CREATE TABLE `dog_measurements` `id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY `dog_id` INT UNSIGNED..
Ways to avoid MySQLdb's “Commands out of sync; you can't run this command now” (2014) exception http://stackoverflow.com/questions/4707957/ways-to-avoid-mysqldbs-commands-out-of-sync-you-cant-run-this-command-now cursor.execute BEGIN CREATE TABLE t1 t1_id INT PRIMARY KEY AUTO_INCREMENT COMMIT cursor.execute BEGIN CREATE.. COMMIT cursor.execute BEGIN CREATE TABLE t2 t2_id INT PRIMARY KEY AUTO_INCREMENT COMMIT The exception is raised during.. work around cursor.execute BEGIN CREATE TABLE t1 t1_id INT PRIMARY KEY AUTO_INCREMENT COMMIT while cursor.nextset is not..
Python - Converting Hex to INT/CHAR http://stackoverflow.com/questions/7595148/python-converting-hex-to-int-char Converting Hex to INT CHAR I am having some difficulty changing a hex to an int char..
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