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import re |
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re_attention = re.compile( |
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r""" |
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\\\(| |
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\\\)| |
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\\\[| |
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\\]| |
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\\\\| |
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\\| |
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\(| |
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\[| |
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:\s*([+-]?[.\d]+)\s*\)| |
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\)| |
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]| |
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[^\\()\[\]:]+| |
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: |
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""", |
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re.X, |
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) |
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re_break = re.compile(r"\s*\bBREAK\b\s*", re.S) |
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def parse_prompt_attention(text, emphasis): |
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res = [] |
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round_brackets = [] |
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square_brackets = [] |
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round_bracket_multiplier = 1.1 |
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square_bracket_multiplier = 1 / 1.1 |
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def multiply_range(start_position, multiplier): |
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for p in range(start_position, len(res)): |
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res[p][1] *= multiplier |
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if emphasis == "None": |
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res = [[text, 1.0]] |
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else: |
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for m in re_attention.finditer(text): |
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text = m.group(0) |
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weight = m.group(1) |
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if text.startswith("\\"): |
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res.append([text[1:], 1.0]) |
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elif text == "(": |
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round_brackets.append(len(res)) |
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elif text == "[": |
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square_brackets.append(len(res)) |
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elif weight is not None and round_brackets: |
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multiply_range(round_brackets.pop(), float(weight)) |
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elif text == ")" and round_brackets: |
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multiply_range(round_brackets.pop(), round_bracket_multiplier) |
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elif text == "]" and square_brackets: |
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multiply_range(square_brackets.pop(), square_bracket_multiplier) |
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else: |
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parts = re.split(re_break, text) |
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for i, part in enumerate(parts): |
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if i > 0: |
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res.append(["BREAK", -1]) |
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res.append([part, 1.0]) |
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for pos in round_brackets: |
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multiply_range(pos, round_bracket_multiplier) |
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for pos in square_brackets: |
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multiply_range(pos, square_bracket_multiplier) |
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if len(res) == 0: |
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res = [["", 1.0]] |
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i = 0 |
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while i + 1 < len(res): |
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if res[i][1] == res[i + 1][1]: |
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res[i][0] += res[i + 1][0] |
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res.pop(i + 1) |
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else: |
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i += 1 |
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return res |
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