Is there an meaning of '[[]]' in a list?

Newsgroups	comp.lang.python
Date	2015-11-19 03:28 -0800
Message-ID	<750e1071-395b-4e9b-ad64-05faa174a5bf@googlegroups.com> (permalink)
Subject	Is there an meaning of '[[]]' in a list?
From	fl <rxjwg98@gmail.com>

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Hi,
In the previous exercises, I see list:
cc=[[],[],[]]

Then, I can have this:

ccc=[[[]],[[]],[[]]]

I can also have

ccc[0]
Out[158]: [[]]

ccc[0]='o'

ccc
Out[163]: ['o', [[]], [[]]]


I have question: Is there any difference between [[]] and []?
[[]] can have deeper assignment and use than 

ccc[0]='o'


Thanks,

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Is there an meaning of '[[]]' in a list? fl <rxjwg98@gmail.com> - 2015-11-19 03:28 -0800
  Re: Is there an meaning of '[[]]' in a list? Nagy László Zsolt <gandalf@shopzeus.com> - 2015-11-19 12:36 +0100
  Re: Is there an meaning of '[[]]' in a list? Peter Otten <__peter__@web.de> - 2015-11-19 12:40 +0100
    Re: Is there an meaning of '[[]]' in a list? Quivis <quivis@domain.invalid> - 2015-11-22 23:25 +0000
      Re: Is there an meaning of '[[]]' in a list? Joel Goldstick <joel.goldstick@gmail.com> - 2015-11-22 19:08 -0500
      Re: Is there an meaning of '[[]]' in a list? Peter Otten <__peter__@web.de> - 2015-11-23 09:57 +0100
      Re: Is there an meaning of '[[]]' in a list? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-25 12:04 +0100
  Re: Is there an meaning of '[[]]' in a list? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-11-19 16:26 +0000

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