"""
演示代码，python的不定长关键字传参
"""

# def demo(a, b, c):
#     print(a)
#     print(b)
#     print(c)
#
#
# data = {"a":1, "b":2, "c":3}
#
# # 字典解包后，通过关键字传参的方式，给函数传递参数
# # 等同于demo(a=1,b=2,c=3)
# demo(**data)

a = "10"
print(a - 2)

