metawards.iterators.build_custom_iterator(custom_function: Union[str, Callable[[], None]], parent_name='__main__') → Callable[[], None][source]

Build and return a custom iterator from the passed function. This will wrap ‘iterate_custom’ around the function to double-check that the custom function is doing everything correctly



This can either be a function, which will be wrapped and

returned, or it can be a string. If it is a string then we will attempt to locate or import the function associated with that string. The search order is;

  1. Is this ‘metawards.iterators.custom_function’?

  2. Is this ‘custom_function’ that is already imported’?

  3. Is this a file name in the current path, if yes then find the function in that file (either the first function called ‘iterateXXX’ or the specified function if custom_function is in the form module::function)

parent_name: str

This should be the __name__ of the calling function, e.g. call this function as build_custom_iterator(func, __name__)


iterator – The wrapped iterator