warnings.filterwarnings(action,category=Warning, ..) is used to filter warnings
warnings.warn(message, category=None) for warning
iter(obj) creates an iterator from an iterable object
next(it) advances the iterator one step and returns the next element
property(fget, fset, fdel, doc) returns a property; all arguments are optional
super(class, obj) returns an associated instance of the superclass
dir(obj) returns an alphabetical list of property names
help([obj]) provides interactive help or help information about a specific object
imp.reload(module) returns the reloaded version of the imported module