CODEWITHSUNDEEP
python
user3260982
user3260982

Reputation:

Create a list of lists in python

I have a list 

a=['10,20,30','30,45,90','40,56,80']

each element of the list is a string. I want to make a list of lists, such that it will look like this:

a=[[10,20,30],[30,45,90],[40,56,80]]

Any ideas? Thanks

Upvotes: 0

Views: 83

Answers (2)

sshashank124
sshashank124

Reputation: 32189

You can do it using split as follows:

b = [map(int, i.split(',')) for i in a]

>>> print b
[[10,20,30],[30,45,90],[40,56,80]]

The split method splits the string on the specified sub-string, in this case: ','. A split without any arguments, such as string.split() will split the string on a whitespace character and then return a list.

Upvotes: 2

vaultah
vaultah

Reputation: 46513

.split splits the string into strings, so we'll convert each one to int after splitting.

>>> a = ['10,20,30','30,45,90','40,56,80']
>>> [[int(y) for y in x.split(',')] for x in a]
[[10, 20, 30], [30, 45, 90], [40, 56, 80]]

Upvotes: 2

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