python里的單個下劃線 “_” 有何用處

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. ~                                                                  

復(fù)制代碼

請教，這個for語句里的下劃線的作用

flying_away

應(yīng)該是一個變量吧.

meistudios

一般用作你不關(guān)心其具體值的變量。

leooys

謝謝,我最初奇怪的是，怎么在循環(huán)體里沒有使用這個變量。明白了。