The curly braces are inside the string, so it is being evaluated as string. They need to be outside, so this should work: <div className={“btn-group pull-right ” + (this.props.showBulkActions ? ‘show’ : ‘hidden’)}> Note the space after “pull-right”. You don’t want to accidentally provide the class “pull-rightshow” instead of “pull-right show”. Also the parentheses needs … Read more
Class attributes are accessible through the class: YourClass.clsattribute or through the instance (if the instance has not overwritten the class attribute): instance.clsattribute Methods, as stated by ecatmur in his answer, are descriptors and are set as class attributes. If you access a method through the instance, then the instance is passed as the self parameter … Read more
Objects in Python can have attributes — data attributes and functions to work with those (methods). Actually, every object has built-in attributes (try dir(None), dir(True), dir(…), dir(dir) in Python console). For example you have an object person, that has several attributes: name, gender, etc. You access these attributes (be it methods or data objects) usually … Read more
The subclass should be: class TypeTwoEvent(Event): def __init__(self, level=None, *args, **kwargs): super().__init__(*args, **kwargs) self.sr1 = level Because __init__ is overridden, the base class’ __init__ code will only run if it is explicitly requested. Despite its strange name, __init__ is not specially treated. It gets called automatically after the object is created; but otherwise it’s an … 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
To avoid confusion: the term property has a specific meaning in python. What you’re talking about is what we call class attributes. Since they are always acted upon through their class, I find that it makes sense to document them within the class’ doc string. Something like this: class Albatross(object): “””A bird with a flight … Read more
The curly braces are inside the string, so it is being evaluated as string. They need to be outside, so this should work: <div className={“btn-group pull-right ” + (this.props.showBulkActions ? ‘show’ : ‘hidden’)}> Note the space after “pull-right”. You don’t want to accidentally provide the class “pull-rightshow” instead of “pull-right show”. Also the parentheses needs … Read more