#!/usr/bin/env python def expand(s): if not has_braces(s): return s return ' '.join([expand(t) for t in expand_one(s)]) def has_braces(s): if '{' not in s or '}' not in s: return False start, end = brace_indexes(s) return start < end def expand_one(s): start, end = brace_indexes(s) before, after = s[:start], s[end+1:] inside_parts = s[start+1:end].split(',') return (before + inside + after for inside in inside_parts) def brace_indexes(s): return s.index('{'), s.index('}') print expand('a{b,c,d}e') print expand('{0,1}{0,1}{0,1}') print expand('M/win{7,8}/smoothness.{top_10,typical_25}')
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