基础学习:function

nihongye

1.function   1.key word:def x(arguments)   2.docstring,at the firstline of function body,for example'***print hello world***'   3.arguments style:formal and positonal.definition like:1.(a,keyword1="a",keyword1="b")2.(a,*arguments1,**keywordTypeArguments2)        invoke like:1.(1,keyword1="x") 2.(a,x,d,c,...,keyword1="x1",keywod2="x2"...)3.(*args)  (**args)    4.hard to know:4.7.5 Lambda Forms