Python内置函数input

input([prompt])

If the prompt argument is present, it is written to standard output without a trailing newline. The function then reads a line from input, converts it to a string (stripping a trailing newline), and returns that. When EOF is read, EOFError is raised

说明：

　　1. 如果提供了promat参数，首先将参数值 输出到标准的 输出，并且不换行。函数读取用户输入的值，将其转换成字符串。

>>> s = input('please input your name:')
please input your name:Ain>>> s'Ain' 

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