Python中Swithch Case语法实现
摘自网络
python本身没有switch语句,解决方法有以下3种:
A.使用dictionary
values = {
value1: do_some_stuff1,
value2: do_some_stuff2,
...
valueN: do_some_stuffN,
}
values.get(var, do_default_stuff)()
values = {
value1: do_some_stuff1,
value2: do_some_stuff2,
...
valueN: do_some_stuffN,
}
values.get(var, do_default_stuff)()
网上另一个例子比较容易看懂:
#coding: utf-8
from __future__ import division
def jia(x,y):
print x+y
def jian(x,y):
print x-y
def cheng(x,y):
print x*y
def chu(x,y):
print x/y
operator = {'+':jia,'-':jian,'*':cheng,'/':chu}
def f(x,o,y):
operator.get(o)(x,y)
f(3,'+',2)
B.使用lambda
result = {
'a': lambda x: x * 5,
'b': lambda x: x + 7,
'c': lambda x: x - 2
}[value](x)
C.Brian Beck提供了一个类 switch 来实现其他语言中switch的功能
略……