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15 lines
392 B
Python
15 lines
392 B
Python
import re
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def expand(pattern: str) -> list[str]:
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match = re.search(r'\{([^{}]*)\}', pattern)
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if not match:
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return [pattern]
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pre, post = pattern[:match.start()], pattern[match.end():]
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options = match.group(1).split(',')
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expanded_patterns = []
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for option in options:
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expanded_patterns.extend(expand(pre + option + post))
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return expanded_patterns
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