Combining two lists into a sentences(python)

Question

I have two lists in a list:

t = [['this','is','a','sentence'],['Hello','I','am','Daniel']]

I want to combine them in order to get two sentences:

'this is a sentence. Hello I am Daniel.'

I quickly came up with the following solution:

text = ''
for sent in t:
  text = text + ' '.join(sent) + '. '

But maybe there is more readable(better styled) solution for this task?

Adam.Er8 · Accepted Answer · 2020-04-13T13:54:01.693

3

You can shorten it to a single list comprehension, with another "." at the end:

text = '. '.join(' '.join(sent) for sent in t) + '.'

edited Apr 13 '20 at 13:54

answered Apr 13 '20 at 13:53

Adam.Er8

12,675
3
26
38

@jizhihaoSAMA thanks! always important to make sure output is an exact match :D – Adam.Er8 Apr 13 '20 at 13:54
1

Note that actually building the intermediate list: `'. '.join([' '.join(sent) for sent in t])` is a bit faster (10 to 20%). See [this answer](https://stackoverflow.com/a/9061024/550094) that explains why. – Thierry Lathuille Apr 13 '20 at 13:57

score 1 · Answer 2 · answered Apr 13 '20 at 14:12

You could also use list comprehensions:

In [584]: ''.join([' '+ ' '.join(sent) + '. ' for sent in t])                                                                                                                                               
Out[584]: ' this is a sentence.  Hello I am Daniel. '

Combining two lists into a sentences(python)

2 Answers2