Convert list of strings into list of lists with each element in list of lists as each iterable letter in string. All in one line

Question

With list of strings x:

x = ['foo', 'bar']

How can I do the following in one line?

y = []
for word in x:
    y.append([n for n in word])
print y

Resulting in:

[['f', 'o', 'o'], ['b', 'a', 'r']]

ndpu · Accepted Answer · 2015-03-12 19:38:56Z

5

With list and simple list comprehension:

>>> x = ['foo', 'bar']
>>> y = [list(word) for word in x]
>>> y
[['f', 'o', 'o'], ['b', 'a', 'r']]

or by using map with list:

>>> y = map(list, x)
>>> y
[['f', 'o', 'o'], ['b', 'a', 'r']]

answered Mar 12, 2015 at 19:33

ndpu

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Comments

Cory Kramer · Accepted Answer · 2015-03-12 19:33:21Z

3

You can create a list from each string within a list comprehension.

>>> x = ['foo', 'bar']
>>> [list(i) for i in x]
[['f', 'o', 'o'], ['b', 'a', 'r']]

answered Mar 12, 2015 at 19:33

Cory Kramer

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Daniel · Accepted Answer · 2015-03-12 19:34:13Z

3

>>> map(list, ['foo', 'bar'])
[['f', 'o', 'o'], ['b', 'a', 'r']]

answered Mar 12, 2015 at 19:34

Daniel

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