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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: Ifs and assignments
Date: Thu, 02 Jan 2014 19:45:05 -0500
Organization: IISS Elusive Unicorn
References: <52C59FF6.5000607@allsup.co>
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Xref: csiph.com comp.lang.python:63014

On Thu, 02 Jan 2014 17:20:54 +0000, John Allsup <pydev@allsup.co> declaimed
the following:

>Hi,
>
>This is my debut on this list.
>
>In many languages, such as C, one can use assignments in conditionals 
>and expressions.  The most common, and useful case turns up when you 

	Really? You can't do it in FORTRAN, BASIC, COBOL, Pascal, Ada...

	C, C++, Java, C# are all based on the same core syntax. For all
effective purposes, they are the same as grouping M$ Visual BASIC,
GW-BASIC, Kemeny&Kurtz TrueBASIC as "most languages, such as BASIC"... 

>have if/else if/else if/else constructs.  Consider the following 
>non-working pseudoPython.
>
>import re
>r1 = re.compile("hello (\d)")
>r2 = re.compile("world([!?])")
>
>w = "hello world!"
>
	matcher = [ (r1, handleMatch1), (r2, handleMatch2) ]

>if m = r1.search(w):
>	handleMatch1(m)
>elif m = r2.search(w):
>	handleMatch2(m)
>else:
>	print("No match")
>
	for r, h in matcher:
		m = r.search(w)
		if m:
			h(m)
			break
	else:
		print ("no match")

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/