Re: [Tutor] Tutor Digest, Vol 51, Issue 51

[Kinuthia Muchane]

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Today's Topics:

   1. Re: Equivalent 'case' statement (Alan Gauld)
   2. Re: Equivalent 'case' statement (inhahe)
   3. Reading only a few specific lines of a file (Jason Conner)
   4. Re: Reading only a few specific lines of a file (John Fouhy)
   5. Re: String Replacement question (Faheem)


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Message: 1
Date: Fri, 23 May 2008 00:25:23 +0100
From: "Alan Gauld" <[EMAIL PROTECTED]>
Subject: Re: [Tutor] Equivalent 'case' statement
To: tutor@python.org
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
        reply-type=original


"Dinesh B Vadhia" <[EMAIL PROTECTED]> wrote

Is there an equivalent to the C/C++ 'case' (or 'switch') statement in Python?

No, just if/elif

However you can often achieve similar results with a dictionary:

def func1(v): return v

def func2(v): return v*2


switch = { 'val1': func1,             # use a function for each value
                'val2': func2,

'val3': lambda v: "this is three!" } # or use lambda if preferred

val = raw_input("Value? (val1,val2,val3)")

Something small here. This

print switch.[val](val)

should be: print switch[val](val)

### which is equivalent to:

if val == 'val1': print func1(val)
elif val == 'val2': print func2(val)
elif val == 'val3': print "this is three"

HTH,

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