string_split_and_join.py

In Python, a string can be split on a delimiter.

Example:

>>> a = "this is a string"
>>> a = a.split(" ") # a is converted to a list of strings. 
>>> print a
['this', 'is', 'a', 'string']
Joining a string is simple:

>>> a = "-".join(a)
>>> print a
this-is-a-string 
Task
You are given a string. Split the string on a " " (space) delimiter and join using a - hyphen.

Function Description

Complete the split_and_join function in the editor below.

split_and_join has the following parameters:

string line: a string of space-separated words
Returns

string: the resulting string
Input Format
The one line contains a string consisting of space separated words.

Sample Input

this is a string   
Sample Output

this-is-a-string


Solution
def split_and_join(line):
    a=line
    a_split=a.split(" ")
    a_join="-".join(a_split)
    return a_join
    # write your code here

if __name__ == '__main__':
    line = input()
    result = split_and_join(line)
    print(result)