CODEWITHSUNDEEP
python-2.7
Herman
Herman

Reputation: 45

converting string characters in 2D list in Python 2.7

I create a 2D list, here is what I tried

list = [[] for i in range(2)]
data = 'abcd'

for row in data:
  for col in row:
    list[:0] = data

I got

['a','b','c','d', 'a','b','c','d','a','b','c','d','a','b','c','d']

But what I want is

['a','b']
['c','d']

Anyone can help?

Upvotes: 0

Views: 21

Answers (2)

pakpe
pakpe

Reputation: 5479

You can to this without iteration:

data = 'abcd'
r = [list(data[:2]) , list(data[2:])]

print(r)
#[['a', 'b'], ['c', 'd']]

Upvotes: 1

mgries
mgries

Reputation: 38

The following should work:

LIST_SIZE = 2
lists = [[] for _ in range(LIST_SIZE)]
data = 'abcd'

for i in range(LIST_SIZE):
    for j in range(LIST_SIZE):
        letter = data[LIST_SIZE * i + j]
        lists[i].append(letter)

Upvotes: 0

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