python里的单个下划线 “_” 有何用处

leooys

1. import random
   
2. 
   
3. 
   
4. articles = ["the", "a", "another", "her", "his"]
   
5. subjects = ["cat", "dog", "horse", "man", "woman", "boy", "girl"]
   
6. verbs = ["sang", "ran", "jumped", "said", "fought", "swam", "saw",
   
7.          "heard", "felt", "slept", "hopped", "hoped", "cried",
   
8.          "laughed", "walked"]
   
9. adverbs = ["loudly", "quietly", "quickly", "slowly", "well", "badly",
   
10.            "rudely", "politely"]
    
11. 
    
12. for _ in [1, 2, 3, 4, 5]:
    
13.     article = random.choice(articles)
    
14.     subject = random.choice(subjects)
    
15.     verb = random.choice(verbs)
    
16.     if random.randint(0, 1) == 0:
    
17.         print(article, subject, verb)
    
18.     else:
    
19.         adverb = random.choice(adverbs)
    
20.         print(article, subject, verb, adverb)
    
21. ~                                                                  

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请教，这个for语句里的下划线的作用

flying_away

应该是一个变量吧.

meistudios

一般用作你不关心其具体值的变量。

leooys

谢谢,我最初奇怪的是，怎么在循环体里没有使用这个变量。明白了。