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python Programming Glossary: timeWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python it will use type to create the class. Read that several times. When you do class Foo Bar pass Python does the following Is.. techniques monkey patching class decorators 99 of the time you need class alteration you are better off using these. But.. alteration you are better off using these. But 99 of the time you don't need class alteration at all. share improve this..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python basic nature most failures I debug happened a long long time ago in a galaxy far far away. This means that I do believe with.. like 192.168.1.1 is just fine. When implementing a date time abstraction the str can be 010 4 12 15 35 22 etc. The goal is..
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 set range p 2 n 1 p return primes timeit.Timer stmt 'get_primes.get_primes 1000000 ' setup 'import.. 1000000 ' setup 'import get_primes' .timeit 1 1.1499958793645562 Can it be made even faster EDIT This.. euler primes share improve this question Warning timeit results may vary due to differences in hardware or version..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained of . BUT you can not perform for i in mygenerator a second time since generators can only be used once they calculate 0 then.. this is a bit tricky Then your code will be run each time the for uses the generator. Now the hard part The first time.. the for uses the generator. Now the hard part The first time the for calls the generator object created from your function..
http://stackoverflow.com/questions/261638/how-do-i-protect-python-code employer wants to limit the usage of the software with a time restricted license file. If we distribute the .py files or even..
Is there any way to kill a Thread in Python? http://stackoverflow.com/questions/323972/is-there-any-way-to-kill-a-thread-in-python each threads checks on regular interval to see if it is time for him to exit. For example import threading import ctypes.. of this thread. If the thread is busy in a system call time.sleep socket.accept ... the exception is simply ignored. If.. ... ... t.raiseExc SomeException while t.isAlive time.sleep 0.1 t.raiseExc SomeException If the exception is to be..
*args and **kwargs? [duplicate] http://stackoverflow.com/questions/3394835/args-and-kwargs dictionaries as arguments of a function AND at the same time as a wildcard so I can pass ANY argument Is there a simple example..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do the if __name__ __main__ do # Threading example import time thread def myfunction string sleeptime lock args while 1 lock.acquire.. example import time thread def myfunction string sleeptime lock args while 1 lock.acquire time.sleep sleeptime lock.release.. myfunction string sleeptime lock args while 1 lock.acquire time.sleep sleeptime lock.release time.sleep sleeptime if __name__..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code . The example run in the bottom of the code takes a long time to be solved in my machine dumrat@dumrat ~ programming python.. be solved in my machine dumrat@dumrat ~ programming python time python camels.py 'F' 'F' 'F' 'G' 'B' 'B' 'B' 'F' 'F' 'G' 'F'..
What is the most “pythonic” way to iterate over a list in chunks? http://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks of integers which I need to work with four integers at a time. Unfortunately I don't have control of the input or I'd have..
How can you profile a Python script? http://stackoverflow.com/questions/582336/how-can-you-profile-a-python-script on the Project Euler and other places asking how to time the execution of their solutions. Sometimes the given answers.. asking how to time the execution of their solutions. Sometimes the given answers are somewhat kludgey i.e. adding timing code.. called cProfile. It not only gives the total running time but also times each function separately and tells you how many..
Calling an external command in Python http://stackoverflow.com/questions/89228/calling-an-external-command-in-python functions with the subprocess module For quick dirty one time scripts os.system is enough though. share improve this answer..
Decoding HTML entities with Python http://stackoverflow.com/questions/1208916/decoding-html-entities-with-python with Python I'm trying to decode HTML entries from here NYTimes.com and I cannot figure out what I am doing wrong. Take for.. Take for example U.S. Adviser #8217 s Blunt Memo on Iraq Time #8216 to Go Home #8217 I've tried BeautifulSoup decode 'iso.. data data U.S. Adviser #8217 s Blunt Memo on Iraq Time #8216 to Go Home #8217 print decode_unicode_references data..
What is the difference between Python's re.search and re.match? http://stackoverflow.com/questions/180986/what-is-the-difference-between-pythons-re-search-and-re-match of whether a newline precedes it. Now enough talk. Time to some example code # example code string_with_newlines something..
Python crashing when running two commands (Segmentation Fault: 11) http://stackoverflow.com/questions/18158381/python-crashing-when-running-two-commands-segmentation-fault-11 bash 9217 Responsible Terminal 3148 User ID 501 Date Time 2013 08 10 00 29 28.571 0300 OS Version Mac OS X 10.9 13A524d..
PyPy — How can it possibly beat CPython? http://stackoverflow.com/questions/2591879/pypy-how-can-it-possibly-beat-cpython languages is able to automatically generate a Just in Time compiler for any dynamic language. It also allows a mix and..
How do I get the UTC time of “midnight” for a given timezone? http://stackoverflow.com/questions/373370/how-do-i-get-the-utc-time-of-midnight-for-a-given-timezone result on the day of the switch to or from Daylight Saving Time. The reason for this is that neither the datetime constructors..
How can I profile python code line-by-line? http://stackoverflow.com/questions/3927628/how-can-i-profile-python-code-line-by-line Proc2 at line 149 Total time 0.606656 s Line # Hits Time Per Hit Time Line Contents 149 @profile 150 def Proc2.. at line 149 Total time 0.606656 s Line # Hits Time Per Hit Time Line Contents 149 @profile 150 def Proc2 IntParIO 151..
NumPy: calculate averages with NaNs removed http://stackoverflow.com/questions/5480694/numpy-calculate-averages-with-nans-removed Edit Combining all of the timing data from timeit import Timer setupstr import numpy as np from scipy.stats.stats import nanmean.. dat mm np.mean mdat axis 1 mm.filled np.nan N 2 t1 Timer method1 setupstr .timeit N t2 Timer np.mean l for l in d if.. np.nan N 2 t1 Timer method1 setupstr .timeit N t2 Timer np.mean l for l in d if not np.isnan l for d in dat setupstr..
Secondary axis with twinx(): how to add to legend? http://stackoverflow.com/questions/5484922/secondary-axis-with-twinx-how-to-add-to-legend ' r' label 'temp' ax.legend loc 0 ax.grid ax.set_xlabel Time h ax.set_ylabel r Radiation MJ m^ 2 d^ 1 ax2.set_ylabel r Temperature.. l in lns ax.legend lns labs loc 0 ax.grid ax.set_xlabel Time h ax.set_ylabel r Radiation MJ m^ 2 d^ 1 ax2.set_ylabel r Temperature..
http://stackoverflow.com/questions/5969173/how-to-swig-in-vs2010 error s stopping compilation 1 1 Build FAILED. 1 1 Time Elapsed 00 00 02.10 Build 0 succeeded 1 failed 0 up to date..
http://stackoverflow.com/questions/6012963/subset-sum-problem A i print Solution solution time1 time print Time execution time1 time0 python algorithm subset sum share improve..
http://stackoverflow.com/questions/75798/django-vs-grails-vs are usually pretty lengthy and hard to parse through. Time to run a unit test django 2 seconds. Grails 20 seconds the tests..
http://stackoverflow.com/questions/775049/python-time-seconds-to-hms Time Seconds to h m s I have a function that returns information..
Asychronous Programming in Python Twisted http://stackoverflow.com/questions/80617/asychronous-programming-in-python-twisted on a connection it will call dataReceived on a Protocol Time has passed it will call a function registered with callLater..
http://stackoverflow.com/questions/13893287/python-time-limit TASK NEEDS TO BE INTERRUPTED IN PROGRESS AS SOON AS THE TIME ELAPSES. max_time 30 start_time time.time # remember when we..
changing the process name of a python script http://stackoverflow.com/questions/2255444/changing-the-process-name-of-a-python-script # Lets check. Press Ctrl Z user@comp ~ procname ps PID TTY TIME CMD 13016 pts 2 00 00 00 bash 13128 pts 2 00 00 00 My super..
Creating a python dictionary from a line of text http://stackoverflow.com/questions/4356329/creating-a-python-dictionary-from-a-line-of-text of lines like the following CODE XXX DATE 20101201 TIME 070400 CONDITION_CODES LTXT PRICE 999.0000 QUANTITY 100 TSN..
Stop reading process output in Python without hang? http://stackoverflow.com/questions/4417962/stop-reading-process-output-in-python-without-hang free 1122780k cached PID USER PR NI VIRT RES SHR S CPU MEM TIME COMMAND 31735 Barakat 20 0 246m 52m 20m S 19.4 2.7 13 54.91..
Why doesn't memory get released to system after large queries (or series of queries) in django? http://stackoverflow.com/questions/5494178/why-doesnt-memory-get-released-to-system-after-large-queries-or-series-of-quer at that level. USER PID CPU MEM VSZ RSS TTY STAT START TIME COMMAND dlamotte 25694 11.5 34.8 861384 705668 pts 3 Sl 19 11..
http://stackoverflow.com/questions/5942402/python-csv-to-sqlite to with the exception... IT TAKES AN INCREDIBLE AMOUNT OF TIME TO PROCESS. Am I coding it incorrectly Is there a better way..
http://stackoverflow.com/questions/6018986/memory-profiler-for-numpy about 5GB of RAM PID USER PR NI VIRT RES SHR S CPU MEM TIME COMMAND 16994 aix 25 0 5813m 5.2g 5.1g S 0.0 22.1 52 19.66 ipython..
Splitting out the output of ps using Python http://stackoverflow.com/questions/682446/splitting-out-the-output-of-ps-using-python each stat. e.g. USER PID CPU MEM VSZ RSS TTY STAT START TIME COMMAND ... postfix 22611 0.0 0.2 54136 2544 S 15 26 0 00 pickup..
Why doesn't coverage.py properly measure Django's runserver command? http://stackoverflow.com/questions/7051070/why-doesnt-coverage-py-properly-measure-djangos-runserver-command Here's what I observed ps output UID PID PPID C STIME TTY TIME CMD vinay 12081 2098 0 16 37 pts 0 00 00 00 home vinay.. Here's what I observed ps output UID PID PPID C STIME TTY TIME CMD vinay 12081 2098 0 16 37 pts 0 00 00 00 home vinay .virtualenvs.. Here's what I see with noreload ps output UID PID PPID C STIME TTY TIME CMD vinay 12140 2098 5 16 44 pts 0 00 00 00 home vinay..
Can't subtract offset-naive and offset-aware datetimes http://stackoverflow.com/questions/796008/cant-subtract-offset-naive-and-offset-aware-datetimes unaware timestamps in PG and always insert using NOW AT TIME ZONE 'UTC' That way all my timestamps are UTC by default even..
Improving Python execution speed with parallel threads http://stackoverflow.com/questions/8430899/improving-python-execution-speed-with-parallel-threads y my_q2.get print RESULT x y print TOTAL EXECUTION TIME time.time _start From my machine this results in mpenning@mpenning.. arg1 50 RESULT 0.50578212738 1.01011300087 TOTAL EXECUTION TIME 1.02570295334 mpenning@mpenning T61 ~ share improve this answer..
Python: garbage collection fails? http://stackoverflow.com/questions/9617001/python-garbage-collection-fails of the output of top PID USER PR NI VIRT RES SHR S CPU MEM TIME COMMAND 5478 moooeeeep 20 0 2397m 2.3g 3428 S 0 29.8 0 09.15..
redirecting sys.stdout to python logging http://stackoverflow.com/questions/975248/redirecting-sys-stdout-to-python-logging thing is we want the following printed out ERROR LEVEL TIME WHERE MSG Now all sys.stdout sys.stderr msgs pretty much in.. strm_out.setFormatter logging.Formatter DEFAULT_LOG_TIME_FORMAT DEFAULT_LOG_TIME_FORMAT root_logger.setLevel default_level.. logging.Formatter DEFAULT_LOG_TIME_FORMAT DEFAULT_LOG_TIME_FORMAT root_logger.setLevel default_level root_logger.addHandler..
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