Input :

"The boy is running on the train"

Output expected:

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

What is the easiest solution to achieve this in python.

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

Output

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