10
有人向我展示了python語法這個奇怪的例子。爲什麼[4]工作?這個python語法怎麼回事? (c == cs)
我本來會期望它評估爲[5]或[6],兩者都不起作用。有沒有一些過早的優化在這裏不應該是?
In [1]: s = 'abcd'
In [2]: c = 'b'
In [3]: c in s
Out[3]: True
In [4]: c == c in s
Out[4]: True
In [5]: True in s
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-5-e00149345694> in <module>()
----> 1 True in s
TypeError: 'in <string>' requires string as left operand, not bool
In [6]: c == True
Out[6]: False