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python Programming Glossary: myclass

What is a metaclass in Python?

http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python

... else ... class Bar object ... pass ... return Bar ... MyClass choose_class 'foo' print MyClass # the function returns a class.. pass ... return Bar ... MyClass choose_class 'foo' print MyClass # the function returns a class not an instance class '__main__.Foo'.. returns a class not an instance class '__main__.Foo' print MyClass # you can create an object from this class __main__.Foo object..

The meaning of a single- and a double-underscore before an object name in Python

http://stackoverflow.com/questions/1301346/the-meaning-of-a-single-and-a-double-underscore-before-an-object-name-in-python

a variable that is considered private. Example class MyClass ... def __init__ self ... self.__superprivate Hello ... self._semiprivate.. Hello ... self._semiprivate world ... mc MyClass print mc.__superprivate Traceback most recent call last File.. print mc._semiprivate world print mc.__dict__ '_MyClass__superprivate' 'Hello' '_semiprivate' ' world ' share improve..

Difference between __str__ and __repr__ in Python

http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python

about c anyway. I usually use an eval like format MyClass this r that r self.this self.that . It does not mean that you.. . It does not mean that you can actually construct MyClass or that those are the right constructor arguments but it is.. the goal of repr. You want to be able to differentiate MyClass 3 and MyClass 3 . The goal of __str__ is to be readable Specifically..

Static class variables in Python

http://stackoverflow.com/questions/68645/static-class-variables-in-python

not inside a method are class or static variables class MyClass ... i 3 ... MyClass.i 3 As @Daniel points out this creates a.. are class or static variables class MyClass ... i 3 ... MyClass.i 3 As @Daniel points out this creates a class level i variable.. from any instance level i variable so you could have m MyClass m.i 4 MyClass.i m.i 3 4 This is different from C and Java but..

Why are Python's 'private' methods not actually private?

http://stackoverflow.com/questions/70528/why-are-pythons-private-methods-not-actually-private

__myPrivateMethod . How then can one explain this class MyClass ... def myPublicMethod self ... print 'public method' ... def.. self ... print 'this is private ' ... obj MyClass obj.myPublicMethod public method obj.__myPrivateMethod Traceback.. most recent call last File line 1 in AttributeError MyClass instance has no attribute '__myPrivateMethod' dir obj '_MyClass__myPrivateMethod'..

What happens when you call `if key in dict`

http://stackoverflow.com/questions/13001913/what-happens-when-you-call-if-key-in-dict

you call `if key in dict` I have a class let's call it myClass that implements both __hash__ and __eq__ . I also have a dict.. both __hash__ and __eq__ . I also have a dict that maps myClass objects to some value computing which takes some time. Over.. the course of my program many in the order of millions myClass objects are instantiated. This is why I use the dict to keep..

The meaning of a single- and a double-underscore before an object name in Python

http://stackoverflow.com/questions/1301346/the-meaning-of-a-single-and-a-double-underscore-before-an-object-name-in-python

call last File stdin line 1 in module AttributeError myClass instance has no attribute '__superprivate' print mc._semiprivate..

TkInter Invoke Event in Main Loop

http://stackoverflow.com/questions/270648/tkinter-invoke-event-in-main-loop

methods on a root window from some other object class myClass def __init__ self root print root background is s root.cget..

Python 'self' explained

http://stackoverflow.com/questions/2709821/python-self-explained

as a parameter. To illustrate in Ruby I can do this class myClass def myFunc name @name name end end Which I understand quite.. easily. However in Python I need to include self class myClass def myFunc self name self.name name Can anyone talk me through..

python packaging for relative imports (again sorry)

http://stackoverflow.com/questions/4348452/python-packaging-for-relative-imports-again-sorry

I would like to use the following directory layout myClass __init__.py test demo.py benchmark.py specs.py src __init__.py.. test demo.py benchmark.py specs.py src __init__.py myClass.py Now my questions are How do the test files from within the.. do the test files from within the package properly import myClass.py How would you import the package from outside assuming you..

SQLAlchemy - build query filter dynamically from dict

http://stackoverflow.com/questions/7604967/sqlalchemy-build-query-filter-dynamically-from-dict

based on the dict. I know I can do session.query myClass .filter_by web_dict However that only works when the values.. attribute for k v in web_dict.items q session.query myClass .filter myClass.__dict__ k .like ' s ' v Not sure how to build.. for k v in web_dict.items q session.query myClass .filter myClass.__dict__ k .like ' s ' v Not sure how to build the query from..