in Python input is [[1,2,3],[2,3,4]] form
not like integer form 1 2 3 2 3 4
but having []
in code
input =[]
inputfunc() //get input array
print input
You input
[[1,2,3],[2,3,4]]
python result will print
[[1,2,3],[2,3,4]]
So can I save this variable? or I must using String parsing?
You can use ast.literal_eval() to convert that string into a python object like this:
>>> import ast
>>> ast.literal_eval('[[1,2,3],[2,3,4]]')
[[1, 2, 3], [2, 3, 4]]
>>> L=ast.literal_eval('[[1,2,3],[2,3,4]]')
>>> type(L)
<class 'list'>
>>> L
[[1, 2, 3], [2, 3, 4]]
>>>
ast stands for Abstract Syntax Tree. literal_eval() is much more safe than eval().
Quoting from official doc:
ast.literal_eval(node_or_string) Safely evaluate an expression node or a Unicode or Latin-1 encoded string containing a Python literal or container display. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, booleans, and None.
This can be used for safely evaluating strings containing Python values from untrusted sources without the need to parse the values oneself. It is not capable of evaluating arbitrarily complex expressions, for example involving operators or indexing.
input =[]: not using builtin names as variable names would be a good start.