The built-in object can be instantiated but can’t have any attributes set on it. (I wish it could, for this exact purpose.) It doesn’t have a __dict__ to hold the attributes. I generally just do this: class Object(object): pass a = Object() a.somefield = somevalue When I can, I give the Object class a more … Read more
Simple input[name=Sex][value=M] would do pretty nice. And it’s actually well-described in the standard doc: Multiple attribute selectors can be used to refer to several attributes of an element, or even several times to the same attribute. Here, the selector matches all SPAN elements whose “hello” attribute has exactly the value “Cleveland” and whose “goodbye” attribute … Read more
Note that best practice in Python 2.7 is to use new-style classes (not needed with Python 3), i.e. class Foo(object): … Also, there’s a difference between an ‘object’ and a ‘class’. To build a dictionary from an arbitrary object, it’s sufficient to use __dict__. Usually, you’ll declare your methods at class level and your attributes … Read more
You may use the different accessors to communicate your intent to someone reading your code, and make it easier to write classes which will work correctly no matter how their public API is called. class Person attr_accessor :age … end Here, I can see that I may both read and write the age. class Person … Read more
The name attribute is used when sending data in a form submission. Different controls respond differently. For example, you may have several radio buttons with different id attributes, but the same name. When submitted, there is just the one value in the response – the radio button you selected. Of course, there’s more to it … Read more
AssemblyVersion Where other assemblies that reference your assembly will look. If this number changes, other assemblies must update their references to your assembly! Only update this version if it breaks backward compatibility. The AssemblyVersion is required. I use the format: major.minor (and major for very stable codebases). This would result in: [assembly: AssemblyVersion(“1.3”)] If you’re … Read more
Try hasattr(): if hasattr(a, ‘property’): a.property See zweiterlinde’s answer below, who offers good advice about asking forgiveness! A very pythonic approach! The general practice in python is that, if the property is likely to be there most of the time, simply call it and either let the exception propagate, or trap it with a try/except … Read more