How to Easily Convert a String Representation of a List to a Python List?

Converting a String Representation of a List to a List with Ease

Question:

How to convert something like the following Convert string representation of list to list?

x = '[ "A","B","C" , " D"]'

Even if the user adds spaces between commas and within quotes, it needs to be handled correctly and converted to:

x = ["A", "B", "C", "D"] 

Answer:

This conversion can be easily accomplished using the ast.literal_eval() function.

import ast

x = '[ "A","B","C" , " D"]'
x = ast.literal_eval(x)

ast.literal_eval() function:

• Evaluates an expression node or a string containing only a Python literal or container display.
• The provided string or node can only contain the following Python literal structures: String, Byte, Number, Tuple, List, Dictionary, Set, Boolean, None and Ellipsis.
• can be used to evaluate strings containing Python values ​​without parsing the values ​​yourself. It cannot evaluate arbitrarily complex expressions, such as those involving operators or indexes.

In order to further eliminate the impact of spaces, you can use list parsing:

x = [n.strip() for n in x]

will get the final result:

['A', 'B', 'C', 'D']

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