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EX.What's wrong with booleans
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README.md
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README.md
@ -40,7 +40,7 @@ So, here we go...
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- [> not knot!/别纠结!](#-not-knot别纠结)
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- [> Half triple-quoted strings/三个引号](#-half-triple-quoted-strings三个引号)
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- [> Midnight time doesn't exist?/不存在的午夜?](#-midnight-time-doesnt-exist不存在的午夜)
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- [> What's wrong with booleans?](#-whats-wrong-with-booleans)
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- [> What's wrong with booleans?/布尔你咋了?](#-whats-wrong-with-booleans布尔你咋了)
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- [> Class attributes and instance attributes](#-class-attributes-and-instance-attributes)
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- [> yielding None](#-yielding-none)
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- [> Mutating the immutable!](#-mutating-the-immutable)
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@ -763,12 +763,11 @@ midnight_time 并没有被输出.
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---
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### > What's wrong with booleans?
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### > What's wrong with booleans?/布尔你咋了?
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1\.
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```py
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# A simple example to count the number of boolean and
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# integers in an iterable of mixed data types.
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# 一个简单的例子, 统计下面可迭代对象中的布尔型值的个数和整型值的个数
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mixed_list = [False, 1.0, "some_string", 3, True, [], False]
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integers_found_so_far = 0
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booleans_found_so_far = 0
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@ -812,9 +811,9 @@ another_dict[1.0] = "Python"
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''
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```
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#### 💡 Explanation:
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#### 💡 说明:
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* Booleans are a subclass of `int`
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* 布尔值是 `int` 的子类
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```py
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>>> isinstance(True, int)
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True
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@ -822,13 +821,13 @@ another_dict[1.0] = "Python"
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True
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```
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* The integer value of `True` is `1` and that of `False` is `0`.
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* 所以 `True` 的整数值是 `1`, 而 `False` 的整数值是 `0`.
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```py
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>>> True == 1 == 1.0 and False == 0 == 0.0
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True
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```
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* See this StackOverflow [answer](https://stackoverflow.com/a/8169049/4354153) for the rationale behind it.
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* 关于其背后的原理, 请看这个 StackOverflow 的[回答](https://stackoverflow.com/a/8169049/4354153).
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---
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