1、打开Python，新建一个空白的PY文档。
2、def new_students(*args):
for all_students in args:
print(all_students)
the_list = ["Peter", "Cherry", "Ben", "Ken", "Lee"]
new_students(*the_list)
首先我们用for loops来把list里面的所有值给打印出来。
3、def new_students(*args):
for all_students in args:
print(all_students)
the_list = ["Peter", "Cherry", "Ben", "Ken", "Lee"]
new_students(the_list)
如果不加*，那么只会整个列表呈现出来，而不是只把值给返回来。
4、new_students("Peter", "Cherry", "Ben", "Ken", "Lee")
虽然可以用普通的方式把列表的值给打印出来，但是如果里面的值非常多，那么工作量很大，而且容易出错，所以*args可以很好地表现。
5、def new_student(classroom, year, *args):
print(classroom)
print(year)
for all in args:
print(all)
the_list = ["Peter", "Cherry", "Ben", "Ken", "Lee"]
new_student("001", "2018", *the_list)
增加两个变量在前面也不影响使用。
6、def new_students(*args):
for all_students in args:
print(all_students)
the_list = ("Peter", "Cherry", "Ben", "Ken", "Lee")
new_students(*the_list)
除了list，tuples也是可以运用得上。
7、def details(**kwargs):
for key, value in kwargs.items():
print(key)
print(value)
contact = {"Peter":"18", "Alice":"16", "Ben":"17"}
details(**contact)
**kwargs对应的要用dictionary。
