String Split and Join | HackerRank

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.
Input Format
The first line contains a string consisting of space separated words.
Output Format
Print the formatted string as explained above.
Sample Input
this is a string
Sample Output
this-is-a-string

Solution

def split_and_join(line):
    # write your code here
    list_string=line.split(' ')

    return "-".join(list_string)

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

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