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19 lines
380 B
19 lines
380 B
11 months ago
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import re
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def find_letter_index(string):
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pattern = r'([a-zA-Z])x\b'
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matches = re.findall(pattern, string)
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letter_indices = []
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for match in matches:
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letter_index = string.index(match)
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letter_indices.append(letter_index)
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return letter_indices
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# 示例使用
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string = "ax+b + cx - dx + e^x"
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indices = find_letter_index(string)
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print(indices)
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