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python Programming Glossary: allWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python is a metaclass in Python I've mastered almost all the Python concepts well let's say they're just OO concepts.. very peculiar idea of what classes are borrowed from the Smalltalk language. In most languages classes are just pieces of code.. object at 0x8997b4c Creating classes dynamically Since classes are objects you can create them on the fly like..
Flatten (an irregular) list of lists in Python http://stackoverflow.com/questions/2158395/flatten-an-irregular-list-of-lists-in-python covered before here here here here but as far as I know all solutions except for one fail on a list like this L 1 2 3 4..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained self._median yield self._rightchild And this is the caller result candidates list self while candidates node candidates.pop.. What happens when the method _get_child_candidates is called A list is returned A single element is returned Is it called.. A list is returned A single element is returned Is it called again When subsequent calls do stop The code comes from Jochen..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python in Python duplicate Possible Duplicates Flattening a shallow list in Python Comprehension for flattening a sequence of.. x y x.extend y l Error message Traceback most recent call last File line 1 in File line 1 in AttributeError 'NoneType'.. at each step a new intermediate result list object gets allocated and all the items in the previous intermediate result..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python Python. That includes ints strings functions and classes. All of them are objects. And all of them have been created from..
How to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square ColorNegate@Binarize srcAdjusted ConvexArea Mask All 2 largestComponent Image SortBy components First 1 2 By filling.. ComponentMeasurements lX CaliperLength Centroid Mask # 100 All 2 # 2 1 All 3 horizontalGridLineMasks SortBy ComponentMeasurements.. lX CaliperLength Centroid Mask # 100 All 2 # 2 1 All 3 horizontalGridLineMasks SortBy ComponentMeasurements lY CaliperLength..
What can you use Python generator functions for? http://stackoverflow.com/questions/102535/what-can-you-use-python-generator-functions-for collect the results and then display them one at a time. All of the results would have to be collected before you showed..
Why (0-6) is -6 = False? [duplicate] http://stackoverflow.com/questions/11476190/why-0-6-is-6-false debugging integer cpython share improve this question All integers from 5 to 256 inclusive are cached as global objects..
Python subprocess readlines() hangs http://stackoverflow.com/questions/12419198/python-subprocess-readlines-hangs error os.close master_fd proc.wait print This is reached All three code examples print 'hello' immediately as soon as the..
What do (lambda) function closures capture in Python? http://stackoverflow.com/questions/2295290/what-do-lambda-function-closures-capture-in-python the adders array within a debugger shows that it does. All lambda functions refer to the last value of i 3 which results..
What does plus equals (+=) do in Python? http://stackoverflow.com/questions/2347265/what-does-plus-equals-do-in-python wrong with Python. At the moment I have to agree with her. All of the experienced programmers I've shown this to are equally..
Evaluating a mathematical expression in a string http://stackoverflow.com/questions/2371436/evaluating-a-mathematical-expression-in-a-string message view home 15549426 ''' __note__ ''' All I've done is rewrap Paul McGuire's fourFn.py as a class so I.. 0 else return float op def eval self num_string parseAll True self.exprStack results self.bnf.parseString num_string.. results self.bnf.parseString num_string parseAll val self.evaluateStack self.exprStack return val You can use..
How can I use a DLL from Python http://stackoverflow.com/questions/252417/how-can-i-use-a-dll-from-python above IBM's EHLLAPI is a fairly consistent interface. All calls pass four void pointers EHLLAPI sends the return code..
How do I get the path of the current executed file in python? http://stackoverflow.com/questions/2632199/how-do-i-get-the-path-of-the-current-executed-file-in-python itself. some_path module_locator.py def we_are_frozen # All of the modules are built in to the interpreter e.g. by py2exe..
Is there a simple, elegant way to define Singletons in Python? [closed] http://stackoverflow.com/questions/31875/is-there-a-simple-elegant-way-to-define-singletons-in-python functions and not a class would serve well as a singleton. All its variables would be bound to the module which could not be..
Why use pip over easy_install? http://stackoverflow.com/questions/3220404/why-use-pip-over-easy-install this question From Ian Bicking's own introduction to pip All packages are downloaded before installation. Partially completed..
Can I install Python windows packages into virtualenvs? http://stackoverflow.com/questions/3271590/can-i-install-python-windows-packages-into-virtualenvs virtualenv share improve this question Yes you can. All you need is easy_install binary_installer_built_with_distutils.exe..
http://stackoverflow.com/questions/3684484/peak-detection-in-a-2d-array paw pp.subplot 4 2 2 i 2 pp.imshow detected_peaks pp.show All you need to do after is use scipy.ndimage.measurements.label..
Python UnicodeDecodeError - Am I misunderstanding encode? http://stackoverflow.com/questions/368805/python-unicodedecodeerror-am-i-misunderstanding-encode encodings and had little to no respect for other cultures. All these civilizations crumbled to dust. Think about it people..
How do I determine the size of an object in Python? http://stackoverflow.com/questions/449560/how-do-i-determine-the-size-of-an-object-in-python an object in bytes. The object can be any type of object. All built in objects will return correct results but this does not..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python actual class hasn't been created yet when it is called. All of these things will be true for a metaclass implementation..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields somewhat hackish solutions by Will Hardy and Michael Hall. All of these are based on Django South hooks which according to..
Seeking clarification on apparent contradictions regarding weakly typed languages http://stackoverflow.com/questions/9929585/seeking-clarification-on-apparent-contradictions-regarding-weakly-typed-language involving the term strongly typed or weakly typed . All that you can really say with any certainty is that a strongly..
Django Tastypie Advanced Filtering: How to do complex lookups with Q objects http://stackoverflow.com/questions/10021749/django-tastypie-advanced-filtering-how-to-do-complex-lookups-with-q-objects Meta for tastypie I have filtering set as filtering 'name ALL 'description' ALL 'email' ALL 'query' 'icontains' Any ideas.. I have filtering set as filtering 'name ALL 'description' ALL 'email' ALL 'query' 'icontains' Any ideas to how I can tackle.. set as filtering 'name ALL 'description' ALL 'email' ALL 'query' 'icontains' Any ideas to how I can tackle this Thanks..
IOError when trying to open existing files http://stackoverflow.com/questions/10802418/ioerror-when-trying-to-open-existing-files IOError print PDB file NOT FOUND print 'Z VALUES FOR ALL CHARGED RESIDUES' print zdata #diagnostic import pickle f1 open..
How can you refresh all regions in Beaker cache in Pyramid? http://stackoverflow.com/questions/11187626/how-can-you-refresh-all-regions-in-beaker-cache-in-pyramid refresh on each region I was wondering how I might refresh ALL regions python pyramid beaker share improve this question..
Python: List Sorting with Multiple Attributes and Mixed Order http://stackoverflow.com/questions/1516249/python-list-sorting-with-multiple-attributes-and-mixed-order multiple attributes. I can do that in ascending order for ALL attributes easily with L.sort key operator.attrgetter attribute..
Python memory usage? loading large dictionaries in memory http://stackoverflow.com/questions/2211965/python-memory-usage-loading-large-dictionaries-in-memory if you want practical help edit your question to show ALL of your code. Also tell us what is the it that shows memory..
Using urllib2 with SOCKS proxy http://stackoverflow.com/questions/2537726/using-urllib2-with-socks-proxy x.x.x.x y That is it sets the same proxy for ALL urllib2 requests. How can I have different proxies for different..
How can I download all emails with attachments from Gmail? http://stackoverflow.com/questions/348630/how-can-i-download-all-emails-with-attachments-from-gmail m.list to get all the mailboxes resp items m.search None ALL # you could filter using the IMAP rules here check http www.example..
How can I speed up fetching pages with urllib2 in python? http://stackoverflow.com/questions/3490173/how-can-i-speed-up-fetching-pages-with-urllib2-in-python the data. Note that I can't do the latter part until ALL of the pages have been fetched that's what my issue is. Also..
SQLite date storage and conversion http://stackoverflow.com/questions/4272908/sqlite-date-storage-and-conversion foo bar VALUES datetime.date 2003 6 25 cur.execute SELECT ALL FROM foo data cur.fetchall data zip data 0 print data # datetime.date.. INSERT INTO foo bar VALUES '2003 06 25' cur.execute SELECT ALL FROM foo data cur.fetchall data zip data 0 print data # datetime.date..
How to display picture and get mouse click coordinate on it http://stackoverflow.com/questions/5501192/how-to-display-picture-and-get-mouse-click-coordinate-on-it image img anchor nw canvas.config scrollregion canvas.bbox ALL #function to be called when mouse is clicked def printcoords.. get the loaded picture dimension you would use canvas.bbox ALL and you might want to switch to using canvasx and canvasy coords..
Run a linux system command as a superuser, using a python script http://stackoverflow.com/questions/583216/run-a-linux-system-command-as-a-superuser-using-a-python-script sudo man sudoers.html#nopasswd_and_passwd username ALL NOPASSWD etc init.d postfix or something similar. share improve..
http://stackoverflow.com/questions/761804/trimming-a-string-in-python 'Bob has a cat'.strip 'Bob has a cat' ' Hello '.strip # ALL spaces at ends removed 'Hello' If you need only to remove one..
Appending to 2D lists in Python http://stackoverflow.com/questions/7745562/appending-to-2d-lists-in-python when I append to one of the empty lists python appends to ALL of the sublists as follows listy 2 .append 1 yields 1 1 2 3..
django auth User truncating email field http://stackoverflow.com/questions/915910/django-auth-user-truncating-email-field EmailField.__init__ email_field_init but this will change ALL EmailField fields lengths so you could also try from django.contrib.auth.models..
Creating a logging handler to connect to Oracle? http://stackoverflow.com/questions/935930/creating-a-logging-handler-to-connect-to-oracle specific written prior permission. # VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING # ALL IMPLIED.. ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING # ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT.. WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL # VINAY SAJIP BE LIABLE FOR ANY SPECIAL INDIRECT OR CONSEQUENTIAL..
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