轉載自：
http://www.uml.org.cn/oobject/201211231.asp
https://www.jianshu.com/p/b8cebdb301b9?utm_campaign=maleskine&utm_content=note&utm_medium=seo_notes&utm_source=recommendation
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1.while循環的格式 while 條件: 條件滿足時，做的事情1 條件滿足時，做的事情2 條件滿足時，做的事情3 ...(省略)... demo
認識現實世界與虛擬世界的橋樑 感受python帶來的魔力 數據類型 Python裏，最常用的數據類型有三種——字符串(str)、整數(int)和浮點數(float) 字符串，字符串英文string，簡寫str 字符串的識別方式非常簡單—
簡單介紹：要做的事：同交易員一起開發交易相關係統；能力要求：能獨立解決問題，完成項目開發，有較強的學習能力（技術和業務）品格正直，較強的心裏承壓能力；職業前景：能提供給你完全不同於互聯網公司的報酬上限，職業途徑；與一流交易員溝通機會，瞭解他
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