Python中没有切换功能 [英] Is there no switch function in Python
问题描述
我似乎无法在Python中找到switch语句。
我希望能够做到
切换（var）
案例1：
打印" var = 1"
案例2：
打印" ; var = 2"
但似乎我必须这样做。
if（var = 1）
print" var = 1"
elseif（var = 2）
print" var = 2"
是不是更容易？
I dont seem to be able to find the switch statement in Python.
I would like to be able to do
switch(var)
case 1 :
print "var = 1"
case 2:
print "var = 2"
But it seems that i have to do.
if(var=1)
print "var =1"
elseif(var=2)
print "var=2"
Is ther no easier way??
推荐答案
" Rudi Hansen" < RS ************** @ pobox.dk>写道：
"Rudi Hansen" <rs**************@pobox.dk> writes:
我希望能够做到
开关（var）
案例1：
print" var = 1
案例2：
打印var = 2"
但似乎我必须这样做。
if（var = 1 ）
print" var = 1"
elseif（var = 2）
print" var = 2"
是不是更容易？
I would like to be able to do
switch(var)
case 1 :
print "var = 1"
case 2:
print "var = 2"
But it seems that i have to do.
if(var=1)
print "var =1"
elseif(var=2)
print "var=2"
Is ther no easier way??
一种方法是使用dicts：
swoosh = {1：" var = 1"，2：" var = 2"}
print swoosh [var]
-
Marius Bernklev
one way is using dicts:
swoosh = {1: "var = 1", 2: "var = 2"}
print swoosh[var]
--
Marius Bernklev
Rudi Hansen< rs ************** @ pobox.dk>写道：
Rudi Hansen <rs**************@pobox.dk> wrote:
我似乎无法在Python中找到switch语句。
对，没有一个。
我希望能够做到
switch（var）<案例1：
打印" var = 1"
案例2：
打印var = 2
但似乎我必须do。
if（var = 1）
print" var = 1"
elseif（var = 2）
print" var = 2"
是不是更容易？
I dont seem to be able to find the switch statement in Python.
Right, there isn''t one.
I would like to be able to do
switch(var)
case 1 :
print "var = 1"
case 2:
print "var = 2"
But it seems that i have to do.
if(var=1)
print "var =1"
elseif(var=2)
print "var=2"
Is ther no easier way??
几个，从
开始
如果var in（1 ，2）：打印''var =％s''％var
最恐怖的成语，当你必须做一些实质性的事情时
每个分支的开关，是一个可调用的词典 - 在这个玩具中
的情况下可能是：
switch = {1：lambda：sys.stdout。写（''var = 1 \ n''），
2：lambda：sys.stdout.write（''var = 2 \ n''），}
switch.get（var，lambda：''''）（）
if / elif树也没问题，尽管t他的语法并不像你想象的那样......：
如果var == 1：
print''var is one''
elif var == 2：
print''var is two''
Alex
several, starting with
if var in (1,2): print ''var = %s'' % var
The most Pythonic idiom, when you have to do something substantial in
each branch of the switch, is a dictionary of callables -- in this toy
case it might be:
switch = {1: lambda: sys.stdout.write(''var=1\n''),
2: lambda: sys.stdout.write(''var=2\n''), }
switch.get(var, lambda: '''')()
An if/elif tree is also fine, though the syntax is not as you think...:
if var == 1:
print ''var is one''
elif var == 2:
print ''var is two''
Alex
在文章< CR ******************** @ news000.worldonline.dk> ;,
Rudi Hansen< rs * *************@pobox.dk>写道：
In article <CR********************@news000.worldonline.dk>,
Rudi Hansen <rs**************@pobox.dk> wrote:
我似乎无法在Python中找到switch语句。
我希望能够做到
切换（ var）
case 1：
print" var = 1"
case 2：
print" var = 2"
5行，55个字符，包括打印报表。
但似乎我必须这样做。
if（var = 1）
print" var = 1"
elseif（var = 2）
print" var = 2"
4行，52个字符（一次更正），包括打印
语句（如第一个例子中所述）。
是不是更容易？
I dont seem to be able to find the switch statement in Python.
I would like to be able to do
switch(var)
case 1 :
print "var = 1"
case 2:
print "var = 2"
5 lines, 55 characters including the print statements.
But it seems that i have to do.
if(var=1)
print "var =1"
elseif(var=2)
print "var=2"
4 lines, 52 characters (once corrected) including the print
statements (as written in the first example).
Is ther no easier way??
你希望它以什么方式更容易？
- -
\S - si *** @ chiark.greenend.org.uk - http://www.chaos.org.uk/~sion/
___ | 坦率地说，我对这种或那种企鹅没有任何感情
\ X / | --Arthur C. Clarke
她的努力是什么？ddre hl？heddes b？ce bump bump bump
In what way do you want it to be "easier"?
--
\S -- si***@chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
___ | "Frankly I have no feelings towards penguins one way or the other"
\X/ | -- Arthur C. Clarke
her nu becomet se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump
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