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python Programming Glossary: inThe Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained Python yield keyword explained What is the use of the yield keyword in Python What does.. keyword explained What is the use of the yield keyword in Python What does it do For example I'm trying to understand.. yield keyword in Python What does it do For example I'm trying to understand this code def node._get_child_candidates self..
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 do you split a list into evenly sized chunks in Python I have a list of arbitrary.. do you split a list into evenly sized chunks in Python I have a list of arbitrary length and I need to split.. have a list of arbitrary length and I need to split it up into equal size chunks and operate on it. There are some obvious..
http://stackoverflow.com/questions/509211/pythons-slice-notation slice notation To me this notation needs a bit of picking up. It looks extremely powerful but I haven't quite got my.. but I haven't quite got my head around it and am looking for a good guide. python slice share improve this question.. through the rest of the array a end # items from the beginning through end 1 a # a copy of the whole array There is also..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python of what classes are borrowed from the Smalltalk language. In most languages classes are just pieces of code that describe.. manipulating inheritance vars such as __dict__ etc. Indeed metaclasses are especially useful to do black magic and.. name models.CharField max_length 30 age models.IntegerField But if you do this guy Person name 'bob' age '35'..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python find it way too easy to disturb its string representation. In the face of ambiguity remember Python resists the temptation..
Why does comparing strings in Python using either '==' or 'is' sometimes produce a different result? http://stackoverflow.com/questions/1504717/why-does-comparing-strings-in-python-using-either-or-is-sometimes-produce where two variables are set to the value 'public' . In a conditional expression I have the comparison var1 is var2.. True a is b False so no wonder they're not the same right In other words is is the id a id b share improve this answer..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained bit dangerous since you can end up with an infinite loop. In this case candidates.extend node._get_child_candidates distance..
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules is x found Some possible choices include the list above In the enclosing source file In the class namespace In the function.. include the list above In the enclosing source file In the class namespace In the function definition In the for loop.. above In the enclosing source file In the class namespace In the function definition In the for loop index variable Inside..
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 self._stop.set def stopped self return self._stop.isSet In this code you should call stop on the thread when you want it..
What does ** (double star) and * (star) do for python parameters? http://stackoverflow.com/questions/36901/what-does-double-star-and-star-do-for-python-parameters does double star and star do for python parameters In the following method calls what does the and do for param2 def.. The args will give you all function parameters a list In 1 def foo args ... for a in args ... print a ... ... In 2 foo.. In 1 def foo args ... for a in args ... print a ... ... In 2 foo 1 1 In 4 foo 1 2 3 1 2 3 The kwargs will give you all..
How can I represent an 'Enum' in Python? http://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python or equivalently class Animals Enum ant 1 bee 2 cat 3 dog 4 In earlier versions one way of accomplishing enums is def enum..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do another module __name__ will be set to the module's name. In the case of your script let's assume that it's executing as..
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 n return izip_longest args fillvalue fillvalue Example In pesudocode to keep the example terse. grouper 'ABCDEFG' 3 'x'..
How do you remove duplicates from a list in Python whilst preserving order? http://stackoverflow.com/questions/480214/how-do-you-remove-duplicates-from-a-list-in-python-whilst-preserving-order in or a more Pythonic idiom if possible. Related question In Python what is the fastest algorithm for removing duplicates..
Convert XML/HTML Entities into Unicode String in Python http://stackoverflow.com/questions/57708/convert-xml-html-entities-into-unicode-string-in-python I get back #x01ce which represents an with a tone mark. In binary this is represented as the 16 bit 01ce. I want to convert..
How to do relative imports in Python? http://stackoverflow.com/questions/72852/how-to-do-relative-imports-in-python where the module is actually located on the file system. In Python 2.6 they're adding the ability to reference modules relative..
Syntax error on print with Python 3 http://stackoverflow.com/questions/826948/syntax-error-on-print-with-python-3 3.0.1 r301 69561 Feb 13 2009 20 04 18 MSC v.1500 32 bit Intel on win32 Type help copyright credits or license for more.. python python 3.x share improve this question In Python 3.0 print became a function. You need to include parenthesis..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference the_string print 'got' the_string the_string 'In a kingdom by the sea' print 'set to' the_string outer_string.. many a year ago got It was many and many a year ago set to In a kingdom by the sea after outer_string It was many and many..
Using a WHERE ___ IN ___ statement http://stackoverflow.com/questions/14245396/using-a-where-in-statement a WHERE ___ IN ___ statement I'm trying to figure out how to properly use.. I'm trying to figure out how to properly use a WHERE _ IN _ statement Definition c.execute '''CREATE TABLE IF NOT EXISTS.. TABLE IF NOT EXISTS tab _id integer PRIMARY KEY AUTOINCREMENT obj text NOT NULL ''' I'm trying to do something like..
“Large data” work flows using pandas http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas B dict fields 'field_10'...... dc 'field_10' ..... REPORTING_ONLY dict fields 'field_1000' 'field_1001'... dc group_map_inverted.. you can optionally specify # columns a list of the columns IN THAT GROUP if you wanted to # select only say 3 out of the 20..
How can I handle exceptions in a list comprehension in Python? http://stackoverflow.com/questions/1528237/how-can-i-handle-exceptions-in-a-list-comprehension-in-python part of all of this truth 1 literally i.e. lexically IN the comprehension itself you can't 2 practically you delegate..
Any python libs for parsing Bind zone files? http://stackoverflow.com/questions/236859/any-python-libs-for-parsing-bind-zone-files use bicop for classical zone files like these TTL 86400 @ IN SOA ns1.first ns.de. postmaster.robot.first ns.de. 2006040800.. 14400 refresh 1800 retry 604800 expire 86400 minimum @ IN NS ns1.first ns.de. I will have a look at dnspython share improve..
http://stackoverflow.com/questions/280075/atomic-operations-in-django 'UPDATE table_name SET counter counter 1 WHERE id IN s' pk_list return qs class VisitorDayTypeCounter models.Model..
python list in sql query as parameter http://stackoverflow.com/questions/283645/python-list-in-sql-query-as-parameter elements of the list say select name from studens where id IN THE LIST l How do i accomlish this python sql share improve.. for unused in l query 'SELECT name FROM students WHERE id IN s ' placeholders cursor.execute query l share improve this..
imploding a list for use in a python MySQLDB IN clause http://stackoverflow.com/questions/589284/imploding-a-list-for-use-in-a-python-mysqldb-in-clause a list for use in a python MySQLDB IN clause I know how to map a list to a string foostring .join.. that I can use the following to get that string into an IN clause cursor.execute DELETE FROM foo.bar WHERE baz IN ' s'.. an IN clause cursor.execute DELETE FROM foo.bar WHERE baz IN ' s' foostring What I need is to accomplish the same thing SAFELY..
Creating a logging handler to connect to Oracle? http://stackoverflow.com/questions/935930/creating-a-logging-handler-to-connect-to-oracle the software without specific written prior permission. # VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING # ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS... ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING # ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN..
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