引言
實際上Python是沒有所謂的switch case寫法的渊涝，熟悉C艸和Java的同學(xué)可能已經(jīng)習(xí)慣了用switch case結(jié)構(gòu)去優(yōu)雅的處理一些事情，比如這樣：
switch(變量){
case 變量值1:
//...;
break;
case 變量值2:
//...;
break;
...
case default:
//...;
break;
}
但是在Python中尉共，官方對switch case的需求是這樣回復(fù)的：
" You can do this easily enough with a sequence of if... elif... elif... else. There have been some proposals for switch statement syntax, but there is no consensus (yet) on whether and how to do range tests. "
感覺有點low。
解決
可用字典方法解決這個問題：
# switch = {"valueA":functionA,"valueB":functionB,"valueC":functionC}
# try:
# switch["value"]() #執(zhí)行相應(yīng)的方法唤蔗。
# except KeyError as e:
# pass 或 functionX #執(zhí)行default部分
switch = {
"a":lambda x:x*2,
"b":lambda x:x*3,
"c":lambda x:x**x
}
try:
swtich["c"](6)
except KeyError as e:
pass
