On Sun, 02 Mar 2014 15:17:11 +0100, Eric Jacoboni
<eric.jacob...@gmail.com> wrote:
Le 02/03/2014 15:05, Mark Lawrence a écrit :
The behaviour is consistent except when you try to modify a tuple.
Not in my opinion...
li = [10, 30]
li = li + "spam" --> TypeError: can only concatenate list (not "str")
li += "spam" --> Ok
possibly because you expect += to take "spam" as a string, but have you
looked at the result?
In [1]: mylist = ['1', '2']
In [2]: mylist += 'spam'
In [3]: mylist
Out[3]: ['1', '2', 's', 'p', 'a', 'm']
consequently, try adding something that can not be interpreted as a
sequence:
In [4]: mylist += 3
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-4-782b544a29d1> in <module>()
----> 1 mylist += 3
TypeError: 'int' object is not iterable
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