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After process the values from a stdin I got the following list in my python program:

[['92', '022'], ['82', '12'], ['77', '13']]

I am trying to have the values as:

[[92, 22], [82, 12], [77, 13]]

I have tried to map the values but found error: 

print map(int, s)
Traceback (most recent call last):
  File "C:/Users/lenovo-pc/PycharmProjects/untitled11/order string.py", line 13, in <module>
    print map(int, s)
TypeError: int() argument must be a string or a number, not 'list'

Where s is my list.

Kindly, suggest me what is the optimized way to make the list of str to convert into integer.

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Simple list comprehension:

>>> [ list(map(int,ele)) for ele in l ]

#driver values :

IN : l = [['92', '022'], ['82', '12'], ['77', '13']]
OUT : [[92, 22], [82, 12], [77, 13]]

The error :

TypeError: int() argument must be a string or a number, not 'list'

is thrown since the map function takes in a flat iterable or list / 1D list in a loose sense. Since you are sending it a multi-dimensional list, it iterates over the sub-list and tries to apply the function on them and hence throws the error.

map(function, iterable, ...)

The iterable arguments may be a sequence or any iterable object; the result is always a list.

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4 Comments

Yes this is what I was looking for thank you. I will accept after 12 minutes... :P
@JafferWilson : hahaha. Glad to help.
Might be worth adding a line explaining what the problem was and how it was solved? (namely, with a two dimensional list, map(int,s) was sending the sublists, not values, to int()
@ArthurSpoon : doing the edit at the moment. Was googling references to add.

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