python Programming Glossary: notWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python Foo object ... pass ... return Foo # return the class not an instance ... else ... class Bar object ... pass ... return.. 'foo' print MyClass # the function returns a class not an instance class '__main__.Foo' print MyClass # you can create.. from this class __main__.Foo object at 0x89c6d4c But it's not so dynamic since you still have to write the whole class yourself...
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained you wish but you store all the values in memory and it's not always what you want when you have a lot of values. Generators.. you can only iterate over them once . It's because they do not store all the values in memory they generate the values on the.. is just the same except you used instead of . BUT you can not perform for i in mygenerator a second time since generators..
http://stackoverflow.com/questions/509211/pythons-slice-notation slice notation Do you have a good reference on Python's slice notation.. notation Do you have a good reference on Python's slice notation To me this notation needs a bit of picking up. It looks.. a good reference on Python's slice notation To me this notation needs a bit of picking up. It looks extremely powerful..
Python Numpy Very Large Matrices http://stackoverflow.com/questions/1053928/python-numpy-very-large-matrices SQL like GROUP BY aggregation at 1 000 000 rows second. Not bad for a Python based solution Accessing the data as a numpy..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python if objects reference each other . So Python cops out. Note that there is one default which is true if __repr__ is defined.. 𦭛his is everything you need to know about this instance Note I used r above not s . You always want to use repr or r formatting.. is a list oh I don't know containing just 4 elements be Not very. Specifically the strings in a container would find it..
What exactly do “u” and “r”string flags in Python, and what are raw string litterals? http://stackoverflow.com/questions/2081640/what-exactly-do-u-and-rstring-flags-in-python-and-what-are-raw-string-litte r'''...''' r ... r ... are all byte strings and so on . Not sure what you mean by going back there is no intrinsically back..
Python analog of natsort function (sort a list using a “natural order” algorithm) http://stackoverflow.com/questions/2545532/python-analog-of-natsort-function-sort-a-list-using-a-natural-order-algorithm python sorting natsort share improve this question Not builtin an not in the standard library AFAIK. There's a recipe..
writing to existing workbook using xlwt http://stackoverflow.com/questions/2725852/writing-to-existing-workbook-using-xlwt existing files. There are no examples. It is not possible. Not with xlwt nor with any other software. The XLS file structure..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs dicts functions etc. if x is y then x y is also True. Not always. NaN is a counterexample. But usually identity implies..
How to validate IP address in Python? http://stackoverflow.com/questions/319279/how-to-validate-ip-address-in-python
Python: Why is functools.partial necessary? http://stackoverflow.com/questions/3252228/python-why-is-functools-partial-necessary functools.partial offer that you can't get through lambdas Not much in terms of extra functionality but see later and readability.. fit in with the rest of the language make my skin crawl . Not so however for the hordes of lambda lovers who staged one of..
Which game scripting language is better to use: Lua or Python? [closed] http://stackoverflow.com/questions/356160/which-game-scripting-language-is-better-to-use-lua-or-python throat while Lua lets you take objects or leave them . Not everybody loves or needs objects. Python is about to undergo..
Suggestions for a Cron like scheduler in Python? http://stackoverflow.com/questions/373335/suggestions-for-a-cron-like-scheduler-in-python t if self.matchtime t self.action self.args self.kwargs Note Not thoroughly tested Then your CronTab can be specified in.. if self.matchtime t self.action self.args self.kwargs Note Not thoroughly tested Then your CronTab can be specified in normal..
Can I write native iPhone apps using Python http://stackoverflow.com/questions/43315/can-i-write-native-iphone-apps-using-python iphone python cocoa touch share improve this question Not currently currently the only languages available to access the..
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 python object sizeof share improve this question Not sure why you need it knowing size is almost useless. But why..
Standard way to embed version into python package? http://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package string version package share improve this question Not directly an answer to your question but you should consider..
Python - How to check if input is a number (given that input always returns strings) http://stackoverflow.com/questions/5424716/python-how-to-check-if-input-is-a-number-given-that-input-always-returns-stri if type userInput int print Is a number else print Not a number This won't work since input always returns a string...
What's the difference between list and tuples in Python? http://stackoverflow.com/questions/626759/whats-the-difference-between-list-and-tuples-in-python interesting articles on this issue e.g. Python Tuples are Not Just Constant Lists or Understanding tuples vs. lists in Python..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields Abstract specification for arbitrary data fields. Not used for holding data itself but metadata about the fields... models.CharField max_length 1024 class Meta abstract True Note how CustomDataField has a ForeignKey to Site each Site will.. admin At the same time being really powerful. Downsides Not very efficient. This is more of a criticism of the EAV pattern..
How to get line count cheaply in Python? http://stackoverflow.com/questions/845058/how-to-get-line-count-cheaply-in-python a better way of doing that without reading the entire file Not sure... The best solution will always be I O bound best you..
Python: simple list merging based on intersections http://stackoverflow.com/questions/9110837/python-simple-list-merging-based-on-intersections below showed to be a bit faster for the simple cases. Not tested the method given by Hooked yet since it is completely.. I will not be able to trace the errors visually Update 3 Note that reliability of the method is much more important than..
Source interface with Python and urllib2 http://stackoverflow.com/questions/1150332/source-interface-with-python-and-urllib2 you need to set the source IP I'm evangelizing widely for NOT designing abstractions in such an airtight excessively encapsulated..
Python List Comprehension Vs. Map http://stackoverflow.com/questions/1247486/python-list-comprehension-vs-map may be microscopically faster in some cases when you're NOT making a lambda for the purpose but using the same function..
Request UAC elevation from within a Python script? http://stackoverflow.com/questions/130763/request-uac-elevation-from-within-a-python-script cmd.exe window no errors are generated yet the files are NOT copied. If I run cmd.exe as administator and then run my script..
Python - Using the Multiply Operator to Create Copies of Objects in Lists http://stackoverflow.com/questions/1605024/python-using-the-multiply-operator-to-create-copies-of-objects-in-lists operator on a sequence means repetition of the item s NOT creation of copies shallow or deep ones of the items. Nothing..
Django auto_now and auto_now_add http://stackoverflow.com/questions/1737017/django-auto-now-and-auto-now-add args the relevant part of my db is `created` datetime NOT NULL `modified` datetime NOT NULL Is this cause for concern.. my db is `created` datetime NOT NULL `modified` datetime NOT NULL Is this cause for concern Side question in my admin tool..
http://stackoverflow.com/questions/1746613/bitwise-operation-and-usage only if exactly one of its inputs are 1 otherwise it's 0. NOT is 1 only if its input is 0 otherwise it's 0. These can often.. the resultant bit is one of the four two in the case of NOT since it only has one input values shown at the intersection.. at the intersection of the inputs. AND 0 1 OR 0 1 XOR 0 1 NOT 0 1 0 0 0 0 0 1 0 0 1 1 0 1 0 1 1 1 1 1 1 0 One example is..
Does Python support MySQL prepared statements? http://stackoverflow.com/questions/1947750/does-python-support-mysql-prepared-statements to find anything that specifically says it does or does NOT. python mysql prepared statement share improve this question..
MySQL “incorrect string value” error when save unicode string in Django http://stackoverflow.com/questions/2108824/mysql-incorrect-string-value-error-when-save-unicode-string-in-django
How do I perform HTML decoding/encoding using Python/Django? http://stackoverflow.com/questions/275174/how-do-i-perform-html-decoding-encoding-using-python-django ASCII decoded version of the given HTML string. This does NOT remove normal HTML tags like p . for code in htmlCodes ' '..
Import a module from a relative path http://stackoverflow.com/questions/279237/import-a-module-from-a-relative-path # cmd_folder os.path.dirname os.path.abspath __file__ # DO NOT USE __file__ # __file__ fails if script is called in different..
How to display utf-8 in windows console http://stackoverflow.com/questions/3578685/how-to-display-utf-8-in-windows-console to use it and it magically didn't error. This code will NOT error but it shows funny characters instead of japanese text...
How to implement “autoincrement” on Google AppEngine http://stackoverflow.com/questions/3985812/how-to-implement-autoincrement-on-google-appengine Numbers shipping label numbers or the like. A number MUST NOT BE used twice Every number SHOULD BE used when exactly all smaller..
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII http://stackoverflow.com/questions/4198804/how-to-reliably-guess-the-encoding-between-macroman-cp1252-latin1-utf-8-and MacRoman or cp1252. Statistical approach Count character NOT byte frequencies in the data you know to be UTF 8. Determine..
Getting started with secure AWS CloudFront streaming with Python http://stackoverflow.com/questions/6549787/getting-started-with-secure-aws-cloudfront-streaming-with-python above like E23KRHS6GDUF5L #Create a distribution that does NOT need signed URLS hsd HackedStreamingDistributionConfig connection..
How do I run Python code from Sublime Text 2? http://stackoverflow.com/questions/8551735/how-do-i-run-python-code-from-sublime-text-2 To stop Ctrl Break or Tools Cancel Build note CTRL C will NOT work. What to do when Ctrl Break does not work go to Preferences..
Reading a UTF8 CSV file with Python http://stackoverflow.com/questions/904041/reading-a-utf8-csv-file-with-python field2 field3 PS if it turns out that your input data is NOT in utf 8 but e.g. in ISO 8859 1 then you do need a transcoding..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python learned that scanf and gets are both UNSAFE and should NOT BE USED due to potential of buffer overflow. So I wrote this..
|