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Parsing String Groupings (Python)

I have a line that looks something like this:

[["Name1","ID1","DDY1", "CALL1", "WHEN1"], ["Name2","ID2","DDY2", "CALL2", "WHEN2"],...];

This line was taken from the website. There can be any number of groupings. How can I parse this line and only print the Name variables of each group?

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Hope I understood well.



>>> import json
>>> a = json.loads('[["Name1","ID1","DDY1", "CALL1", "WHEN1"], ["Name2","ID2","DDY2", "CALL2", "WHEN2"]]')
>>> [x[0] for x in a]
[u'Name1', u'Name2']
>>>
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import ast
y = ast.literal_eval(input)
[x[0] for x in y]

Thanks to @stephan for pointing me in the right direction with ast.literal_eval. As described in the doc:



Safely evaluate expression node or string containing Python expression. A string or node can only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, booleans, and None.

This can be used to safely evaluate strings containing Python expressions from untrusted sources without having to parse the values.

Note. This is new functionality in Python 2.6.

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