在python中，數字的型別(type)有兩種，int表示整數(integer)、float表示浮點數(也就是小數點)，可透過int(x) 或 float(x)進行型別轉換。如浮點數透過int()轉換整數，會直接捨棄小數點後的數值。

Counter是一个dict的子类，用于计数可哈希对象。它是一个集合，元素像字典键(key)一样存储，它们的计数存储为值。计数可以是任何整数值，包括0和负数。它可以接收一个可迭代对象，并对其元素进行计数。

容器类型的进阶使用（字符串）字符串的拼接与重复字符串的跨行拼接字符串的索引和切片字符串的内置函数字符串的转义字符串和格式化和format内置函数的使用本文目录@[toc]字符串的拼接和重复 {代码...} 字符串的跨行拼接接下来我们要学习的是python中的一个符号，跨行拼接符\。这个符号的作用就是如果一行的代码过长， 可...

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