python - 文字列を 2 番目のスペースで分割する

Question

入力:

"The boy is running on the train"

予想される出力:

["The boy", "boy is", "is running", "running on", "on the", "the train"]

Pythonでこれを達成するための最も簡単な解決策は何ですか.

Answer 1

line="The boy is running on the train"
words=line.split()
k=[words[index]+' '+words[index+1] for index in xrange(len(words)-1)]
print k

出力

['The boy', 'boy is', 'is running', 'running on', 'on the', 'the train']

Answer 2

すべてのスペースで分割してから、ペアを再結合します。

words = inputstr.split()
secondwords = iter(words)
next(secondwords)

output = [' '.join((first, second)) 
          for first, second in zip(words, secondwords)]

デモ：

>>> inputstr = "The boy is running on the train"
>>> words = inputstr.split()
>>> secondwords = iter(words)
>>> next(secondwords)  # output is ignored
'The'
>>> [' '.join((first, second)) for first, second in zip(words, secondwords)]
['The boy', 'boy is', 'is running', 'running on', 'on the', 'the train']

Answer 3

または、次のソリューションitertools.combinations:

>>> s = "The boy is running on the train"
>>> seen = set()
>>> new = []
>>> for tup in itertools.combinations(s.split(), 2):
...     if tup[0] not in seen:
...             new.append(' '.join(tup))
...             seen.add(tup[0])
... 
>>> print new
['The boy', 'boy is', 'is running', 'running on', 'on the', 'the train']

これは実際にはitertools.combinations:p に使用すべきものではありませんが。