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python Programming Glossary: goWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python a way to do it manually. Remember the function type The good old function that lets you know what type an object is print.. my_foo FooChild my_foo.echo_bar True You see where we are going in Python classes are objects and you can create a class.. with 'class' in its name doesn't need to be a class go figure... but it's helpful . So we will start with a simple..
http://stackoverflow.com/questions/1035340/reading-binary-file-in-python It would also save you from changing the condition if you go from byte mode to text or the reverse. with open myfile rb as..
http://stackoverflow.com/questions/120656/directory-listing-in-python from recursing into there. if '.git' in dirnames # don't go into any .git directories. dirnames.remove '.git' share improve..
Get last n lines of a file with Python, similar to tail http://stackoverflow.com/questions/136168/get-last-n-lines-of-a-file-with-python-similar-to-tail file is smaller than what we want # to step back go to the beginning instead f.seek 0 pos f.tell lines f.read .splitlines..
Loop “Forgets” to Remove Some Items http://stackoverflow.com/questions/17299581/loop-forgets-to-remove-some-items 'l' 'k' ' ' 'W' 'o' 'r' 'd' 's' ' ' Hy lk Words So what's going on The nice for x in y loop in Python is really just syntactic.. previous element. Then when you get to the o in Words you go to remove the first occurrence of 'o' which is the one you skipped..
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 to list all primes below N in python This is the best algorithm I could come up with after struggling with a couple of.. for bringing sieve_wheel_30 to my attention. Credit goes to Robert William Hanks for primesfrom2to primesfrom3to rwh_primes.. else 0 tmp const del_mult tmptk off start prime # now we go back to top tk1 so we need to increase pos by 1 pos 1 cpos const..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained while the loop is being iterated It's a concise way to go through all these nested data even if it's a bit dangerous since.. a 1 2 3 4 But in your code it gets a generator which is good because You don't need to read the values twice. You can have..
How can I use a DLL from Python http://stackoverflow.com/questions/252417/how-can-i-use-a-dll-from-python share improve this question I think ctypes is the way to go. The following example of ctypes is from actual code I've written..
Calling a function from a string with the function's name in Python http://stackoverflow.com/questions/3061/calling-a-function-from-a-string-with-the-functions-name-in-python the function's name in Python What is the best way to go about calling a function given a string with the function's.. a string whose contents are bar . What is the best way to go about calling foo.bar I need to get the return value of the.. getattr foo 'bar' result methodToCall As far as that goes lines 2 and 3 can be compressed to result getattr foo 'bar'..
Can I run a Python script as a service (in Windows)? How? http://stackoverflow.com/questions/32404/can-i-run-a-python-script-as-a-service-in-windows-how that service. I am currently aiming for Python and the Django framework as the technologies to implement that service with... AppServerSvc Your code would go in the main method usually with some kind of infinite loop that..
Python UnicodeDecodeError - Am I misunderstanding encode? http://stackoverflow.com/questions/368805/python-unicodedecodeerror-am-i-misunderstanding-encode Think about it people Make your apps Unicode aware for the good of mankind. PS2 Please don't spoil the previous message by.. the Unicode BMP is populated mostly by chinese ideograms ergo Chinese is the basis of Unicode. I can go on inventing outrageous.. ideograms ergo Chinese is the basis of Unicode. I can go on inventing outrageous lies as long as people develop Unicode..
How to install pip on windows? http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows bit. You need to Install setuptools http www.lfd.uci.edu ~gohlke pythonlibs #setuptools Install pip http www.lfd.uci.edu.. pythonlibs #setuptools Install pip http www.lfd.uci.edu ~gohlke pythonlibs #pip For me this installed Pip at C Python27.. Try installing a package pip install httpie There you go hopefully Proxy problems If you work in an office you might..
Generator Expressions vs. List Comprehension http://stackoverflow.com/questions/47789/generator-expressions-vs-list-comprehension generator share improve this question John's answer is good that list comprehensions are better when you want to iterate.. is running too slowly then and only then should you go back and worry about tuning your code. share improve this answer..
How do I duplicate sys.stdout to a log file in python? http://stackoverflow.com/questions/616645/how-do-i-duplicate-sys-stdout-to-a-log-file-in-python has two modes. In interactive mode I want all output to go to the screen as well as to a log file including output from.. output from any system calls. In daemon mode all output goes to the log. Daemon mode works great using os.dup2 . I can't..
What is the best way to implement nested dictionaries in Python? http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python I have to create annoying nested iterators if I want to go over all the values. I could also use tuples as keys like such.. at subsets of the dictionary e.g. if I just want to go state by state . Basically sometimes I want to think of a nested..
Strip HTML from strings in Python http://stackoverflow.com/questions/753052/strip-html-from-strings-in-python text' ' b hello b ' prints 'hello' etc. How would one go about doing this python html share improve this question..
http://stackoverflow.com/questions/8692/how-to-use-xpath-in-python speed and can cope with the distribution of native code go with libxml2. Sample of libxml2 XPath Use import libxml2 doc..
Simple Digit Recognition OCR in OpenCV-Python http://stackoverflow.com/questions/9413216/simple-digit-recognition-ocr-in-opencv-python out cv2.waitKey 0 And it worked below is the result i got Here it worked with 100 accuracy for which the reason i assume.. are of same kind and same size. But any way this is a good start to go for beginners i hope so . share improve this..
http://stackoverflow.com/questions/1119696/java-python-integration from your app e.g. some sort of adapter interface . Go with the simplest thing that works for the moment then consider..
Decoding HTML entities with Python http://stackoverflow.com/questions/1208916/decoding-html-entities-with-python U.S. Adviser #8217 s Blunt Memo on Iraq Time #8216 to Go Home #8217 I've tried BeautifulSoup decode 'iso 8859 1' and.. data U.S. Adviser #8217 s Blunt Memo on Iraq Time #8216 to Go Home #8217 print decode_unicode_references data share improve..
tail -f in python with no time.sleep http://stackoverflow.com/questions/1475950/tail-f-in-python-with-no-time-sleep . import time def follow thefile thefile.seek 0 2 # Go to the end of the file while True line thefile.readline if not..
How are exceptions implemented under the hood? http://stackoverflow.com/questions/1995734/how-are-exceptions-implemented-under-the-hood C constructs and no assembly Finally I heard a rumor that Google employees do not use exceptions for some projects due to.. great example is some of the exception proposals on the Go mailing list which implement exceptions using Goroutines something.. on the Go mailing list which implement exceptions using Goroutines something like a mixture of concurrent coroutines ans..
Heavy usage of Python at Google [closed] http://stackoverflow.com/questions/2560310/heavy-usage-of-python-at-google usage of Python at Google closed Google's heavy usage of Python is it just a matter.. usage of Python at Google closed Google's heavy usage of Python is it just a matter of taste or.. a definitive answer because by the time I interviewed at Google in 2004 Python was already prominent at Google. Indeed there's..
Why the “mutable default argument fix” syntax is so ugly, asks python newbie http://stackoverflow.com/questions/2639915/why-the-mutable-default-argument-fix-syntax-is-so-ugly-asks-python-newbie questions and based on another question . Prerogative Go to http python.net ~goodger projects pycon 2007 idiomatic handout.html#other..
How to setup setuptools for python 2.6 on Windows? http://stackoverflow.com/questions/309412/how-to-setup-setuptools-for-python-2-6-on-windows directory outside your Windows Python installation folder Go the folder refer step 2 and run ez_setup.py from the corresponding.. in the same folder as setuptools 0.6c9 py2.6.egg Go to the corresponding dos prompt and run python ez_setup.py setuptools.. directory outside your Windows Python installation folder Go the folder refer step 2 and run python setup.py install from..
What's the proper way to install pip, virtualenv, and distribute for Python? http://stackoverflow.com/questions/4324558/whats-the-proper-way-to-install-pip-virtualenv-and-distribute-for-python py env1 # Create more INITIAL_ENV bin virtualenv py env2 Go nuts Update The flags no site packges and distribute are now..
How to write the Fibonacci Sequence in Python http://stackoverflow.com/questions/494594/how-to-write-the-fibonacci-sequence-in-python of time as n gets bigger in fact this is O 2 n in time. Go on on the sites I linked to you and will see this on wolfram..
http://stackoverflow.com/questions/5969173/how-to-swig-in-vs2010 your path to SWIG d In Outputs field InputName _wrap.cxx 3 Go to this project properties a C tab Additional Include Directories..
Getting started with secure AWS CloudFront streaming with Python http://stackoverflow.com/questions/6549787/getting-started-with-secure-aws-cloudfront-streaming-with-python the only way to do this is through Amazon's web site. Go into your AWS Account page and click on the Security Credentials..
http://stackoverflow.com/questions/6907473/cannot-import-gst-in-python 2.7 and the GST default is 2.6. This is really easy to fix Go to C Program Files OSSBuild GStreamer v0.10.6 sdk bindings python..
Python, tkinter, changing the window basics http://stackoverflow.com/questions/7546050/python-tkinter-changing-the-window-basics side top fill x pady 10 button1 tk.Button self text Go to Page One command lambda controller.show_frame PageOne button2.. controller.show_frame PageOne button2 tk.Button self text Go to Page Two command lambda controller.show_frame PageTwo button1.pack.. side top fill x pady 10 button tk.Button self text Go to the start page command lambda controller.show_frame StartPage..
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