Python nested list context concatenation

Question

I have a list of lists in python that looks like this:

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

I want to create a line like this:

a,b;c,d

Thus, lists must be separated by character ;

, and values of the same list must be separated by character,

So far I've tried ','.join([y for x in test for y in x])

that returns a,b,c,d

. Not quite there, though, as you can see.

+3

beta June 17. At 9:04 am

3 answers

>>> ';'.join(','.join(x) for x in [['a', 'b'], ['c', 'd']])
'a,b;c,d'

+6

Dan D. June 17. 15 at 9:08 am

To do this functionally, you can use a map:

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


print(";".join(map(".".join, l)))
a.b;c.d

0

Padraic cunningham June 17. 15 at 10:18

NeoWang · Accepted Answer · 2015-06-17T09:07:52+0000

";".join([','.join(x) for x in a])