I will like to convert the following string to a list without using eval in python.
"[['age', '>=', 30], ['age', '<', 36]]"
The output should be like this:
['age', '>=', 30] >> list position -[0]
['age', '<', 36] >> list position -[1]
-
2"not allow to import" Is that a limitation imposed by a homework assignment or from a tool you're trying to use (like some scriptable application that wants a python script?). Either way, please update your question to reflect your exact requirements.SingleNegationElimination– SingleNegationElimination2013-10-17 18:12:09 +00:00Commented Oct 17, 2013 at 18:12
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1 Answer
Try ast.literal_eval():
import ast
x = ast.literal_eval("[['age', '>=', 30], ['age', '<', 36]]")
print x
print type(x)
Running this script displays:
[['age', '>=', 30], ['age', '<', 36]]
<type 'list'>
The ast.literal_eval() is a a safe eval() that only evaluates literals such as strings, lists, tuples, numbers, and booleans.
Source: http://docs.python.org/dev/library/ast.html#ast.literal_eval
