如果你想在最终结果中生成一个由逗号分隔的字符串，你可以使用这样的方法:

sentence = ['this','is','a','sentence']
sentences_strings = "'" + "','".join(sentence) + "'"
print (sentences_strings) # you will get "'this','is','a','sentence'"

如果你想在最终结果中生成一个由逗号分隔的字符串，你可以使用这样的方法:

sentence = ['this','is','a','sentence']
sentences_strings = "'" + "','".join(sentence) + "'"
print (sentences_strings) # you will get "'this','is','a','sentence'"

使用str.join:

>>> words = ['this', 'is', 'a', 'sentence']
>>> '-'.join(words)
'this-is-a-sentence'
>>> ' '.join(words)
'this is a sentence'

我们还可以使用Python的reduce函数:

from functools import reduce

sentence = ['this','is','a','sentence']
out_str = str(reduce(lambda x,y: x+"-"+y, sentence))
print(out_str)

来自未来的编辑:请不要使用下面的答案。这个函数在python3中被移除，python2已经死亡。即使你仍在使用Python 2，你也应该编写Python 3就绪代码，使不可避免的升级更容易。

虽然@Burhan Khalid的回答很好，但我认为这样更容易理解:

from str import join

sentence = ['this','is','a','sentence']

join(sentence, "-") 

join()的第二个参数是可选的，默认为" "。

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