Proper way to weight whole tag group same, based on code?

https://github.com/comfyanonymous/ComfyUI/blob/master/comfy/sd1_clip.py

import comfy.sd1_clip as s

tests = [
    # Single tag weight tests
    "tag1:2",                    # Basic weight outside parens
    "(tag1:2)",                  # Single tag weight in parens
    "(tag1:2, tag2)",           # Weight inside group
    "tag1:2, tag2",             # Weight outside group
    # Group tests for comparison
    "(tag1, tag2:2)",           # Weight on second tag in group
    "(tag1, tag2):2",           # Weight after group
    "(tag1:2, tag2:3)",         # Multiple weights in group
]

for t in tests:
    print(t, "→", s.token_weights(t, 1.0))

output:

tag1:2 → [('tag1:2', 1.0)]
(tag1:2) → [('tag1', 2.0)]
(tag1:2, tag2) → [('tag1:2, tag2', 1.1)]
tag1:2, tag2 → [('tag1:2, tag2', 1.0)]
(tag1, tag2:2) → [('tag1, tag2', 2.0)]
(tag1, tag2):2 → [('tag1, tag2', 1.1), (':2', 1.0)]
(tag1:2, tag2:3) → [('tag1:2, tag2', 3.0)]

tested latest comfyui code in pynb:
- all tag weights must be inside parens
- group tag weight must be inside parens, only last applies
- group tag weight outside is an extra token