＜No. 8＞ 1816. Truncate sentences (simple)

Catalog

Title Description ：

 Python Realization ：

---

Title Description ：

The sentence It's a list of words , Words in the list are separated by a single space , And there are no leading or trailing spaces . Each word is made up of English letters in upper and lower case only （ No punctuation ）.

for example ,"Hello World"、"HELLO" and "hello world hello world" It's all sentences .

Here is a sentence for you s​​​​​​ And an integer k​​​​​​ , Would you please s​​ truncation ​,​​​ send truncation The following sentence contains only front k​​​​​​ Word . return truncation s​​​​​​ After the sentence .

 Python Realization ：

class Solution(object):
    def truncateSentence(self, s, k):
        """
        :type s: str
        :type k: int
        :rtype: str
        """
        list_num = []
        list_num = s.split(" ") # Split the original string by spaces 
        list_final = []
        for i in range (k):
            list_final.append(list_num[i])
        return " ".join(list_final) # take list convert to str

In one line ：

class Solution(object):
    def truncateSentence(self, s, k):
        """
        :type s: str
        :type k: int
        :rtype: str
        """

        return " ".join(s.split(" ")[:k])