python Programming Glossary: wantWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python # bar is inherited from Foo True Eventually you'll want to add methods to your class. Just define a function with the.. when it's created. You usually do this for APIs where you want to create classes matching the current context. Imagine a stupid.. as parameter # you rarely use __new__ except when you want to control how the object # is created. # here the created object..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python about this instance Note I used r above not s . You always want to use repr or r formatting character equivalently inside __repr__.. implementation or you 胩e defeating the goal of repr. You want to be able to differentiate MyClass 3 and MyClass 3 . The goal.. represent it in a way that a user not a programmer would want to read it. Chop off useless digits pretend to be some other..
How do I ensure that re.findall() stops at the right place? http://stackoverflow.com/questions/17765805/how-do-i-ensure-that-re-findall-stops-at-the-right-place question Use re.search instead of re.findall if you only want one match s ' title aaa title title aaa2 title title aaa3 title.. re re.search ' title . title ' s .group 1 'aaa' If you wanted all tags then you should consider changing it to be non greedy..
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 True dim tk1 0 False # help dictionary d # d a b c if I want to find the smallest useful multiple of 30 pos a # on tkc then..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained all the values in memory and it's not always what you want when you have a lot of values. Generators Generators are iterators.. values twice. You can have a lot of children and you don't want them all stored in memory. And it works because Python does.. # when everything's ok the ATM gives you as much as you want corner_street_atm hsbc.create_atm print corner_street_atm.next..
http://stackoverflow.com/questions/261638/how-do-i-protect-python-code be distributed to my employer's customers. My employer wants to limit the usage of the software with a time restricted license.. license file. Another aspect is that my employer does not want the code to be read by our customers fearing that the code may..
How do you split a list into evenly sized chunks in Python? http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python question Here's a generator that yields the chunks you want def chunks l n Yield successive n sized chunks from l. for i..
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 In this code you should call stop on the thread when you want it to exit and wait for the thread to exit properly using join.. an external library that is busy for long calls and you want to interrupt it. The following code allows with some restrictions..
Non-blocking read on a subprocess.PIPE in python http://stackoverflow.com/questions/375427/non-blocking-read-on-a-subprocess-pipe-in-python a subprocess and connect to it's output stream stdout . I want to be able to execute non blocking reads on its stdout. Is there..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python I'm also making this a community wiki in case others want to add to or correct these observations. My original reduce..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do main check you can have that code only execute when you want to run the module as a program and not have it execute when.. as a program and not have it execute when someone just wants to import your module and call your functions themselves. See..
Using global variables in a function other than the one that created them http://stackoverflow.com/questions/423379/using-global-variables-in-a-function-other-than-the-one-that-created-them it is that since global variables are so dangerous Python wants to make sure that you really know that's what you're playing.. requiring the global keyword. See other answers if you want to share a global variable across modules. share improve this..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference are passed in but does let you get the information you want back out def return_a_whole_new_string the_string new_string.. return_a_whole_new_string my_string If you really wanted to avoid using a return value you could create a class to..
Is switching from PHP to Python worth the trouble [closed] http://stackoverflow.com/questions/1486608/is-switching-from-php-to-python-worth-the-trouble is an object. This gives you awesome flexibility. Want to subclass an int No problem Next to that the data structures..
how to find frequency of the keys in a dictionary across multiple text files? http://stackoverflow.com/questions/17186253/how-to-find-frequency-of-the-keys-in-a-dictionary-across-multiple-text-files total 1 This will create an easily parsable dictionary. Want the number of total words Britain word_count_dict Britain total.. of total words Britain word_count_dict Britain total Want the number of times Britain is in files 74.txt and 75.txt sum.. file in word_count_dict else 0 for file in 74.txt 75.txt Want to see all files that the word Britain shows up in file for..
How can I parse HTML with html5lib, and query the parsed HTML with XPath? http://stackoverflow.com/questions/2558056/how-can-i-parse-html-with-html5lib-and-query-the-parsed-html-with-xpath second row of a table html table tr td Header td tr tr td Want This td tr table html so lets try it doc html5lib.parse ' html.. doc html5lib.parse ' html table tr td Header td tr tr td Want This td tr table html ' treebuilder 'lxml' doc lxml.etree._ElementTree.. html tr html td Header html td html tr html tr html td Want This html td html tr html tbody html table html body html html..
Serialize the @property methods in a Python class http://stackoverflow.com/questions/2587119/serialize-the-property-methods-in-a-python-class ... @property def foo self return My name is s self.name Want to serialize to 'name' 'Test User' 'foo' 'My name is Test User'..
Automatic code quality review tool for Python http://stackoverflow.com/questions/296420/automatic-code-quality-review-tool-for-python tools. I am churning quite some python code these days. Want to pass it thru some quality tool. Thanks Related question Are..
using python, Remove HTML tags/formatting from a string http://stackoverflow.com/questions/3398852/using-python-remove-html-tags-formatting-from-a-string p.sub '' data striphtml ' a href foo.com class bar I Want This b text b a ' 'I Want This text ' share improve this answer..
Want procmail to run a custom python script, everytime a new mail shows up http://stackoverflow.com/questions/557906/want-procmail-to-run-a-custom-python-script-everytime-a-new-mail-shows-up procmail to run a custom python script everytime a new mail..
Want to make static SVG plot (from matplotlib) interactive via the browser http://stackoverflow.com/questions/8994357/want-to-make-static-svg-plot-from-matplotlib-interactive-via-the-browser to make static SVG plot from matplotlib interactive via the..
|