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32 lines
862 B
32 lines
862 B
15 years ago
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#!/usr/bin/ipython -pylab
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#
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# $Id: sugar.py,v 1.1 2010-01-22 18:46:50 wirawan Exp $
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#
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# Created: 20100121
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# Wirawan Purwanto
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#
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# Syntactic sugar for python programming. May not be efficient, but many
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# of these tools are nice for quick-and-dirty programming.
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# Beware of their caveats!
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#
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#
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def ifelse(cond, trueval, *args):
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"""An alternative to python's own ternary operator, but with multiple
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conditions to test (like chained if-else-if-else... which is found in
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e.g. m4 language).
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This is of course only a syntactic sugar with its inefficiency and
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dangers (all expressions are evaluated before choosing which one is to
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select). So, beware!"""
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if cond:
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return trueval
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else:
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i = 0
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while i+1 < len(args):
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if args[i]: return args[i+1]
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i += 2
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if i < len(args): return args[i]
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return None # Fallback solution: "None"
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