I have a huge text file.
line 1
line 2
line 3
...
I have converted it into an array of lists:
[[\'String 1\'],[\'String 2\'
Just adding onto alexce's response, you can easily convert the restructured data into JSON:
import json
json.dumps(result)
There are some potential security concerns with top-level arrays. I'm not sure if they're still valid with modern browsers, but you may want to consider wrapping it in an object.
import json
json.dumps({'results': result})