CODEWITHSUNDEEP
pythonlist
user4637416
user4637416

Reputation:

convert element of 2D list into string python

I have a 2D list containing all integers. I want to convert all integer into string:

L = [[1,2,3,4,5],[6,7,8,9,10]]

L = [['1','2','3','4','5'],['6','7','8','9','10']]  # convert into string.

Now print them out like following format:

1 -> 2 -> 3 -> 4 -> 5

6 -> 7 -> 8 -> 9 -> 10

I tried using these codes:

final_out = [i for i in final_out str(ii) for ii in i]

It does not works.

Upvotes: 1

Views: 2873

Answers (3)

Sakib Ahammed
Sakib Ahammed

Reputation: 2480

You can also do that using nested loop:

>>> L = [[1,2,3,4,5],[6,7,8,9,10]]
>>> new_L = [[str(j) for j in i] for i in L]
>>> new_L
[['1', '2', '3', '4', '5'], ['6', '7', '8', '9', '10']]
>>> for i in new_L:
    print ' -> '.join(i)


1 -> 2 -> 3 -> 4 -> 5
6 -> 7 -> 8 -> 9 -> 10
>>>

Upvotes: 0

Moinuddin Quadri
Moinuddin Quadri

Reputation: 48067

You can use map function for this:

>>> L = [[1,2,3,4,5],[6,7,8,9,10]]
>>> L = [map(str, l) for l in L]  # Convert into list of 'str'
>>> L   
[['1', '2', '3', '4', '5'], ['6', '7', '8', '9', '10']]
>>> for l in L:
...     print ' -> '.join(l)
... 
1 -> 2 -> 3 -> 4 -> 5
6 -> 7 -> 8 -> 9 -> 10

Simpler way to write the above code is:

>>> L = [[1,2,3,4,5],[6,7,8,9,10]]
>>> for l in L:
...     print ' -> '.join(map(str, l))

Upvotes: 2

zondo
zondo

Reputation: 20336

Do this:

print("\n".join(" -> ".join(str(num) for num in sub) for sub in L))

Output:

1 -> 2 -> 3 -> 4 -> 5
6 -> 7 -> 8 -> 9 -> 10

Since I used str(num), you can just keep L the same. That is, you don't need to convert them to integers.

Upvotes: 0

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