RE: [DA series - Learn Python with Steem #03] 邏輯判斷 by kona

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da-learnpythonwithsteem · @kona · Jul 30 '18

有個問題，為什麼我在line6, 如果不打東西會顯示IndentationError，可是這樣加上print('')，好像有點多餘，求解答!

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@antonsteemit · Jul 30 '18

對，聽高手@yjcps的!

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@yjcps · Jul 30 '18

高手都不露面的
你是幕后高手:)

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@kona · Jul 30 '18 (edited)

謝謝各高手，學了pass,
還想問問，沒看清題目，這樣用上elif好還是只用if..else好？

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@shine.wong · Jul 30 '18

语句是死的用法是活得，一般没用到的我都保持知道有这个知识点，需要的时候再用，平时都是怎么好用怎么来！PS我也没用elif，你想都用的话写两段也可以呀，嘻嘻！可以多读读互相的代码！

Posted using [Partiko Android](https://play.google.com/store/apps/details?id=io.partiko.android)

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@kona · Jul 30 '18

謝謝

👍 shine.wong

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@shine.wong · Jul 30 '18

$0.04

你可以吧这个print换成pass
![](https://cdn.steemitimages.com/DQmQNGcPgkeWosdePieCnKYLTwVxUjraNeUKuPt3ebiAR1d/image.png)
这样符合语法，但是你这个if里就不要写其他的了，因为我不知道pass是什么作用，只是加了后语法正常能够过编译，如果你加了其他东西，那所加的内容还是会正常运行的。

👍 deanliu

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@yjcps · Jul 30 '18

$0.04

应该是不写东西不符合Python的语法。
在 if True: 的后面要写做出选择后要做的事情，什么都不做写个pass，像这样：

``` python
if True：
    pass
```

👍 deanliu, shine.wong

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@shine.wong · Jul 30 '18

如果加了pass为什么再加其他的语句还是会被运行？pass的作用是？

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@yjcps · Jul 30 '18

![图片.png](https://ipfs.busy.org/ipfs/QmNYpBZS6e7hqFyZsEQcys1EbXtynDdw9AXJhgEpJAAeCr)

你是说这样的情况吗？pass不是跳过某段程序的意思
pass 是用来占位子的，为了让写的程序符合语法，就像上面那样

我知道的pass有两个作用：
一是像上面那样，什么都不做；
另一个是，还没想好程序的某个功能怎么写，写个pass占位子，以后有思路了再完善程序。

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