filter(function, iterable)itertools.ifilter(function, iterable)future_builtins.filter(function, iterable)itertools.ifilterfalse(function, iterable)itertools.filterfalse(function, iterable)function | callable that determines the condition or None then use the identity function for filtering (positional-only)iterable | iterable that will be filtered (positional-only)In most cases a comprehension or generator expression is more readable, more powerful and more efficient than filter() or ifilter().