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devel / comp.lang.python / Re: If a dictionary key has a Python list as its value!

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o Re: If a dictionary key has a Python list as its value!Mats Wichmann

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Re: If a dictionary key has a Python list as its value!

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From: mats@wichmann.us (Mats Wichmann)
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Subject: Re: If a dictionary key has a Python list as its value!
Date: Thu, 7 Mar 2024 11:29:07 -0700
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 by: Mats Wichmann - Thu, 7 Mar 2024 18:29 UTC

On 3/7/24 07:11, Varuna Seneviratna via Python-list wrote:
> If a dictionary key has a Python list as its value, you can read the values
> one by one in the list using a for-loop like in the following.
>
> d = {k: [1,2,3]}
>
>
>> for v in d[k]:
>> print(v)
>
>
> No tutorial describes this, why?
> What is the Python explanation for this behaviour?

Sorry... why is this a surprise? If an object is iterable, you can
iterate over it.

>>> d = {'key': [1, 2, 3]}
>>> type(d['key'])
<class 'list'>
>>> val = d['key']
>>> type(val)
<class 'list'>
>>> for v in val:
.... print(v)
....
....
1 2
3 >>>

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