Python string.join(list) on object array rather than string array

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In Python, I can do:

>>> list = ["a", "b", "c"]
>>> ", ".join(list)
"a, b, c"

Is there any easy way to do the same when I have a list of objects?

>>> class Obj:
...     def __str__(self):
...         return "name"
...
>>> list = [Obj(), Obj(), Obj()]
>>> ", ".join(list)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence item 0: expected string, instance found

Or do I have to resort to a for loop?

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