Message 138185 - Python tracker

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Author	gruszczy
Recipients	gruszczy
Date	2011-06-11.22:02:51
SpamBayes Score	3.9691304e-08
Marked as misclassified	No
Message-id	<1307829771.92.0.859008661902.issue12318@psf.upfronthosting.co.za>
In-reply-to

Content
You can do this: >>> [1] + (1,) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can only concatenate list (not "tuple") to list But you can do this: >>> result = [1] >>> result += (1,) >>> result [1, 1] Is it the expected behaviour, that += does implicit coercion?

You can do this:
>>> [1] + (1,)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can only concatenate list (not "tuple") to list

But you can do this:

>>> result = [1]
>>> result += (1,)
>>> result
[1, 1]


Is it the expected behaviour, that += does implicit coercion?

History
Date	User	Action	Args
2011-06-11 22:02:52	gruszczy	set	recipients: + gruszczy
2011-06-11 22:02:51	gruszczy	set	messageid: <1307829771.92.0.859008661902.issue12318@psf.upfronthosting.co.za>
2011-06-11 22:02:51	gruszczy	link	issue12318 messages
2011-06-11 22:02:51	gruszczy	create