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              Python成員運算符有哪些?【每日一個知識點第101期-Python】

              在任何編程語言中,計算都是最基本的能力,一般來講,計算可以通過運算符和操作數的組合來完成。Python支持的計算類型有很多,各自也都有使用的運算符,今天我們主要來看一下成員運算符。


              Python還支持成員運算符,測試實例中包含了一系列的成員,包括字符串,列表或元組。

              運算符 描述 實例
              in 如果在指定的序列中找到值返回 True,否則返回 False。 x 在 y 序列中 , 如果 x 在 y 序列中返回 True。
              not in 如果在指定的序列中沒有找到值返回 True,否則返回 False。 x 不在 y 序列中 , 如果 x 不在 y 序列中返回 True。

              以下實例演示了Python所有成員運算符的操作:

              實例(Python 2.0+)

              #!/usr/bin/python # -*- coding: UTF-8 -*- a = 10 b = 20 list = [1, 2, 3, 4, 5 ]; if ( a in list ): print 1 – 變量 a 在給定的列表中 list 中 else: print 1 – 變量 a 不在給定的列表中 list 中 if ( b not in list ): print 2 – 變量 b 不在給定的列表中 list 中 else: print 2 – 變量 b 在給定的列表中 list 中 # 修改變量 a 的值 a = 2 if ( a in list ): print 3 – 變量 a 在給定的列表中 list 中 else: print 3 – 變量 a 不在給定的列表中 list 中

              以上實例輸出結果:

              1 - 變量 a 不在給定的列表中 list 
              2 - 變量 b 不在給定的列表中 list 
              3 - 變量 a 在給定的列表中 list 

              《Python入門每日一個知識點》欄目是馬哥教育Python年薪20萬+的學員社群特別發起,分享Python工具、Python語法、Python項目等知識點,幫助大家快速的了解Python學習,快速步入Python高薪的快車道。

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