Usefull python tutorial

[gentlestone]

Can somebody give me an advise where I can found a really good online
tutorial? All I found are useless. For example no tutorial I found
explains this piece of code:

someList = [element for element in otherList if element is not
None]

or this example:

a = a or []

There are only stupid elementary examples in the tutorials I found.

 

[Chris Rebert]

Can somebody give me an advise where I can found a really good online
tutorial? All I found are useless. For example no tutorial I found
explains this piece of code:

   someList = [element for element in otherList if element is not
None]

See http://docs.python.org/tutorial/datastructures.html#list-comprehensions

or this example:

   a = a or []

That's a bit more obscure, and I'm not entirely surprised it's not in
a tutorial:
http://docs.python.org/reference/expressions.html#boolean-operations


You might want to try the official tutorial (unless it's the one
you're complaining about):
http://docs.python.org/tutorial/index.html

I've also heard good things about Dive Into Python:
http://diveintopython.org/

Cheers,
Chris

 

[Simon Brunning]

Can somebody give me an advise where I can found a really good online
tutorial? All I found are useless.

<http://docs.python.org/tutorial/> is really good, as I remember, as
is <http://diveintopython.org/>.

For example no tutorial I found

explains this piece of code:

   someList = [element for element in otherList if element is not
None]

<http://docs.python.org/tutorial/datastructures.html#list-comprehensions>

or this example:

   a = a or []

Strangely not in the tutorial:
<http://docs.python.org/library/stdtypes.html#truth-value-testing>.