Print list in specific way in Python

Question

I have a list like this

list=[[2,3],[3,4]]

I want to print each list in the list like this:
1: 2 3, 2: 3 4
So the first part is the position of the list in the list followed by the numbers in the list. So far i've tried a for loop and a single print line. The for loop works but prints every list in a new line. The other print statement looks like this but it doesn't work at all and i have no idea how to fix it.

print('{0:}:'.format(list[0]),' '.join([', '.join([str(e) for e in slist]) for slist in list]))

For this the list looked like this list = [[1,2,3],[2,3,4]] so the first element in each list is the index for the list (starts at 1) I use Python3

using list a variable name is bad practice

Hackaholic
– Hackaholic

2014-11-14 19:04:42 +00:00
Commented Nov 14, 2014 at 19:04 — Hackaholic
– Hackaholic, Commented Nov 14, 2014 at 19:04
it's just for the question here. but thanks!

8324
– 8324

2014-11-14 19:06:53 +00:00
Commented Nov 14, 2014 at 19:06 — 8324
– 8324, Commented Nov 14, 2014 at 19:06

Padraic Cunningham · Accepted Answer · 2014-11-14 19:21:16Z

3

l =[[2,3],[3,4]]
print(", ".join(["{}: {}".format(ind," ".join(map(str,x))) for ind, x in enumerate(l,1)]))
1: 2 3, 2: 3 4

enumerate(l,1) keeps track of the index of the sublists, we pass 1 as the second parameter to start the indexing at 1 instead of `0.

" ".join(map(str,x) maps all the ints to strings and we use str.format to add : before each index. ", ".join separates each section with a comma.

edited Nov 14, 2014 at 19:21

answered Nov 14, 2014 at 19:10

Padraic Cunningham

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Padraic Cunningham Over a year ago

@iCodez, lol yes I suppose it does, there does not seem to be any simple way to do it. I will add some explanation though :).

Kasravnd · Accepted Answer · 2014-11-14 19:19:29Z

0

you can use join() and enumerate() in a list comprrehension :

>>> l=[[2,3],[3,4]]
>>> ','.join(['{}:{}'.format(i,' '.join(str(t) for t in j)) for i,j in enumerate(l,1)])
'1:2 3,2:3 4'

edited Nov 14, 2014 at 19:19

answered Nov 14, 2014 at 19:13

Kasravnd

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