def import_every(module_name, namespace, _all, _name, condition=lambda name, value: True):
    """Import all functions from a module into the namespace and add to __all__.
    example usage: import_every("operators",globals(),__all__,__name__)
    """
    module = importlib.import_module('.' + module_name, package=_name)
    for name, value in inspect.getmembers(module):
        if name.startswith('_'):  # or not hasattr(value,"__doc__") or value.__doc__ is None:
            continue

        if condition(name, value):
            namespace[name] = value
            _all.append(name)
Import all functions from a module into the namespace and add to __all__.
    example usage: import_every("operators",globals(),__all__,__name__)
    
cola/utils/__init__.py