Use str.join:
>>> words = ['this', 'is', 'a', 'sentence']
>>> '-'.join[words]
'this-is-a-sentence'
>>> ' '.join[words]
'this is a sentence'
Mateen Ulhaq
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answered Sep 17, 2012 at 5:33
Burhan KhalidBurhan Khalid
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A more generic way to convert Python lists to strings would be:
>>> my_lst = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> my_lst_str = ''.join[map[str, my_lst]]
>>> print[my_lst_str]
answered Dec 1, 2015 at 3:11
Aaron SAaron S
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It's very useful for beginners to know why join is a string method.
It's very strange at the beginning, but very useful after this.
The result of join is always a string, but the object to be joined can be of many types [generators, list, tuples, etc].
.join is faster because it allocates memory only once. Better than classical concatenation [see, extended explanation].
Once you learn it, it's very comfortable and you can do tricks like this to add parentheses.
>>> ",".join["12345"].join[["[","]"]]
Out:
'[1,2,3,4,5]'
>>> list = ["[","]"]
>>> ",".join["12345"].join[list]
Out:
'[1,2,3,4,5]'
heilala
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answered May 14, 2016 at 13:55
WallebotWallebot
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Edit from the future: Please don't use the answer below. This function was removed in Python 3 and Python 2 is dead. Even if you are still using Python 2 you should write Python 3 ready code to make the inevitable upgrade easier.
Although @Burhan Khalid's answer is good, I think it's more understandable like this:
from str import join
sentence = ['this','is','a','sentence']
join[sentence, "-"]
The second argument to join[] is optional and defaults to " ".
Anupam
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answered Nov 2, 2015 at 1:51
SilentVoidSilentVoid
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list_abc = ['aaa', 'bbb', 'ccc']
string = ''.join[list_abc]
print[string]
>>> aaabbbccc
string = ','.join[list_abc]
print[string]
>>> aaa,bbb,ccc
string = '-'.join[list_abc]
print[string]
>>> aaa-bbb-ccc
string = '\n'.join[list_abc]
print[string]
>>> aaa
>>> bbb
>>> ccc
answered Sep 3, 2020 at 9:18
We can also use Python's reduce function:
from functools import reduce
sentence = ['this','is','a','sentence']
out_str = str[reduce[lambda x,y: x+"-"+y, sentence]]
print[out_str]
the Tin Man
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answered Nov 29, 2018 at 11:15
1
We can specify how we join the string. Instead of '-', we can use ' ':
sentence = ['this','is','a','sentence']
s=[" ".join[sentence]]
print[s]
the Tin Man
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answered Oct 18, 2019 at 7:46
If you want to generate a string of strings separated by commas in final result, you can use something like this:
sentence = ['this','is','a','sentence']
sentences_strings = "'" + "','".join[sentence] + "'"
print [sentences_strings] # you will get "'this','is','a','sentence'"
Tomerikoo
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answered Jun 30, 2020 at 15:20
CarmorenoCarmoreno
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If you have a mixed content list and want to stringify it, here is one way:
Consider this list:
>>> aa
[None, 10, 'hello']
Convert it to string:
>>> st = ', '.join[map[str, map[lambda x: f'"{x}"' if isinstance[x, str] else x, aa]]]
>>> st = '[' + st + ']'
>>> st
'[None, 10, "hello"]'
If required, convert back to the list:
>>> ast.literal_eval[st]
[None, 10, 'hello']
the Tin Man
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answered Jan 27, 2021 at 10:21
1
def eggs[someParameter]:
del spam[3]
someParameter.insert[3, ' and cats.']
spam = ['apples', 'bananas', 'tofu', 'cats']
eggs[spam]
spam =[','.join[spam]]
print[spam]
Paul Roub
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answered May 7, 2020 at 21:18
1
Without .join[] method you can use this method:
my_list=["this","is","a","sentence"]
concenated_string=""
for string in range[len[my_list]]:
if string == len[my_list]-1:
concenated_string+=my_list[string]
else:
concenated_string+=f'{my_list[string]}-'
print[[concenated_string]]
>>> ['this-is-a-sentence']
So, range based for loop in this example , when the python reach the last word of your list, it should'nt add "-" to your concenated_string. If its not last word of your string always append "-" string to your concenated_string variable.
answered Jul 7, 2020 at 11:03