[docs] [issue18301] In itertools.chain.from_iterable() there is no cls argument

8 Aug 2013


      py.user added the comment:

changed iter(arg) to *arg
...
...
...
import itertools
class A(itertools.chain):
...     @classmethod
...     def from_iter(cls, arg):
...         return cls(*arg)
... 
class B(A):
...     pass
... 
B('ab', 'cd')
<__main__.B object at 0x7fc280e93cd0>
b = B.from_iter(['ab', 'cd'])
b
<__main__.B object at 0x7fc280e93d20>
next(b)
'a'
next(b)
'b'
next(b)
'c'
next(b)
'd'
next(b)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration
----------

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Python tracker <report@bugs.python.org>
<http://bugs.python.org/issue18301>
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