Python - Easiest way to get whole list object in a row

Question

l = [['John'],['rides'],['bike'],['with'],['Mr.','Brown'],]

Assume that i have a list object like that. How can print my list objects in a row without using for statement and append to a string ?

My desired output:

print("my sentence:" + ? )
print("people:" + ? + ", " + ?)

my sentence: John rides bike with Mr. Brown
people: John, Mr. Brown

MAJOR EDIT:

The reason why i create this question is i analyze text based documentation and extract information with named entity so my problem is when i grouo sequential proper nouns which are "name + surname" or " Blah Blah Organization" in list like that :

[[u'Milletvekili', u'Ay\u015fe'], [u'oraya'], [u'Merve', u'Han\u0131m'], [u'ile'], [u'gitti'], [u'.']]

I have an algorithm which compare list objects with my datasets and describes the entity type. After the if statement decided [u'Milletvekili', u'Ay\u015fe'] is a person name ;

if gettype(arr[i][0].split("'")[0]) == "Özel İsim":
      newarr.append("[Person: " + str(arr[i][0]) + "]")

i append that in my new list which will be my in my output like [Person: Mr. Brown]. But i must group Capitalized words then i always have my output like that:

 [Person: [u'Milletvekili', u'Ay\u015fe']]

score 4 · Answer 1 · answered May 01 '16 at 16:36

4

Not quite elegant as the "sum", but alternatively you can use str.join() and map() with functools.partial():

>>> from functools import partial
>>> " ".join(map(partial(str.join, " "), l))
'John rides bike with Mr. Brown'

answered May 01 '16 at 16:36

alecxe

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this also what im looking for but output is [Person: [u'Mr.', u'Brown']] any idea why i cant print objects in a row ? – Arda Nalbant May 01 '16 at 17:12
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@ArdaNalbant sorry, difficult to say. It is not clear what input data you've got at the moment and what is your desired output..could you edit the question and clarify? Thanks so much. – alecxe May 01 '16 at 18:53
Edited my question and im afraid its not clear to understand i think but all i can say is i get [Person: [u'Mr.', u'Brown']] instead of [Person: Mr.Brown] – Arda Nalbant May 01 '16 at 19:53

score 4 · Answer 2 · edited May 23 '17 at 12:23

4

Borrowing from this answer:

" ".join(sum(l, []))
Out[130]: 'John rides bike with Mr. Brown'

edited May 23 '17 at 12:23

Community

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answered May 01 '16 at 16:39

ayhan

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very elegant solution! – MaxU - stand with Ukraine May 01 '16 at 16:41
exactly what i want but how can i implement this to my two print function ? I mean when i want to print john and brown i cant use sum in this way : print("people names:" + ",".join(sum(arr[0], arr[4]))) – Arda Nalbant May 01 '16 at 16:53
Also when i try that code above this is what i get for using unicoded list TypeError: can only concatenate list (not "unicode") to list – Arda Nalbant May 01 '16 at 17:01
Can you give an example for the list that contains unicode characters? – ayhan May 01 '16 at 17:12
Just edited the question instead of missunderstand anything – Arda Nalbant May 01 '16 at 17:23
I'm afraid I don't understand the question. What exactly do you want to append to `newarr`? Is your example the desired output? – ayhan May 01 '16 at 17:39

score 3 · Answer 3 · answered May 01 '16 at 16:43

3

Flatten the list, then join with ' '.

>>> ' '.join(s for sub in l for s in sub)
'John rides bike with Mr. Brown'

Or with itertools.chain:

>>> from itertools import chain
>>> ' '.join(chain(*l))
'John rides bike with Mr. Brown'

answered May 01 '16 at 16:43

timgeb

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Python - Easiest way to get whole list object in a row

3 Answers3