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Python | Convert given list into nested list
• Last Updated : 11 Oct, 2019

Some times, we come over the data that is in string format in a list and it is required to convert it into a list of the list. This kind of problem of converting a list of strings to nested list is quite common in web development. Let’s discuss certain ways in which this can be performed.

Method #1: Using iteration

 `# Python code to convert list ``# of string into list of list`` ` `# List initialization``Input` `=` `[``'Geeeks, Forgeeks'``, ``'65.7492, 62.5405'``,``         ``'Geeks, 123'``, ``'555.7492, 152.5406'``]``          ` `temp ``=` `[]`` ` `# Getting elem in list of list format``for` `elem ``in` `Input``:``    ``temp2 ``=` `elem.split(``', '``)``    ``temp.append((temp2))`` ` `# List initialization``Output ``=` `[] `` ` `# Using Iteration to convert ``# element into list of list``for` `elem ``in` `temp:``    ``temp3 ``=` `[]``    ``for` `elem2 ``in` `elem:``        ``temp3.append(elem2)``    ``Output.append(temp3)`` ` `# printing``print``(Output)`
Output:

[[‘Geeeks’, ‘Forgeeks’], [‘65.7492’, ‘62.5405’], [‘Geeks’, ‘123’], [‘555.7492’, ‘152.5406’]]

Method #2 : Using `ast` [list with numeric values]

 `# Python code to convert list ``# of string into list of list`` ` `# importing``import` `ast`` ` `# List Initialization``Input` `=` `[``'12, 454'``, ``'15.72, 82.85'``, ``'52.236, 25256'``, ``'95.9492, 72.906'``]`` ` `# using ast to convert``Output ``=` `[``list``(ast.literal_eval(x)) ``for` `x ``in` `Input``]`` ` `# printing``print``(Output)`
Output:

[[12, 454], [15.72, 82.85], [52.236, 25256], [95.9492, 72.906]]

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