函数定义和简单调用
公司新来部分新员工，定义函数并循环打印欢迎新员工的消息
employees = {"Chris": "NOC", "David": "PJM", "Brain": "SA", "John": "UX"}
def introduce_employee(employee, post):
print("Welcome our new colleague " + username + ", his post is " + job + " !")
for key, value in employees.items():
username = key
job = value
introduce_employee(username, job)
输出
Welcome our new colleague Chris, his post is NOC ! Welcome our new colleague David, his post is PJM ! Welcome our new colleague Brain, his post is SA ! Welcome our new colleague John, his post is UX !