3 €»eã@s*ddlmZddd„Zeeffdd„ZdS)é)Ú filterfalseNccsjtƒ}|j}|dkr:xPt|j|ƒD]}||ƒ|Vq"Wn,x*|D]"}||ƒ}||kr@||ƒ|Vq@WdS)zHList unique elements, preserving order. Remember all elements ever seen.N)ÚsetÚaddrÚ __contains__)ÚiterableÚkeyÚseenZseen_addÚelementÚk©r úK/tmp/pip-build-3irwxpxt/importlib-metadata/importlib_metadata/_itertools.pyÚunique_everseens  r c CsT|dkrtfƒS|dk r,t||ƒr,t|fƒSyt|ƒStk rNt|fƒSXdS)axIf *obj* is iterable, return an iterator over its items:: >>> obj = (1, 2, 3) >>> list(always_iterable(obj)) [1, 2, 3] If *obj* is not iterable, return a one-item iterable containing *obj*:: >>> obj = 1 >>> list(always_iterable(obj)) [1] If *obj* is ``None``, return an empty iterable: >>> obj = None >>> list(always_iterable(None)) [] By default, binary and text strings are not considered iterable:: >>> obj = 'foo' >>> list(always_iterable(obj)) ['foo'] If *base_type* is set, objects for which ``isinstance(obj, base_type)`` returns ``True`` won't be considered iterable. >>> obj = {'a': 1} >>> list(always_iterable(obj)) # Iterate over the dict's keys ['a'] >>> list(always_iterable(obj, base_type=dict)) # Treat dicts as a unit [{'a': 1}] Set *base_type* to ``None`` to avoid any special handling and treat objects Python considers iterable as iterable: >>> obj = 'foo' >>> list(always_iterable(obj, base_type=None)) ['f', 'o', 'o'] N)ÚiterÚ isinstanceÚ TypeError)ÚobjZ base_typer r r Úalways_iterables) r)N)Ú itertoolsrr ÚstrÚbytesrr r r r Ús