我如何从输入中随机选择一个单词（python）

Question

I want the user to input a sentence, then randomly select a word in that sentence and print it. I do not know how to do this, any help? I can only select one letter from the sentence so far.

Answer 1

What you basically need to do is: prompt for input, split into single words and then choose a random word with the help of the random library :

import random

inp = input("Input: ") # prompt for input
# With an example:
# Input: This is a sentence
# produces the string inp="This is a sentence"
list_input = inp.split() # split up the sentence into a list of words
# In our example: 
# list_input = ["This","is","a","sentence"]

print(random.choice(list_input)) # choose a random item from the list of words
# In our example the print statement would choose randomly one of the four words

Answer 2

This does the thing you want, just like the answer above, but if you wish you can use this one.

import random
sentence = input("Your sentence: ")
words = sentence.split()
words = random.shuffle(words)
yourword = words[0] # or, for more spoiled variation use: 
#yourword = words[random.randint(range(len(words)))]

Answer 3

#in this code we took the input as a list to make it easier taking each word of the sentence alone  
import sys , random 
sentence=sys.argv[1:]
r=random.choice(sentence)
print(r)