[issue45775] Implementation of colorsys.rgb_to_yuv and vice versa

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

A link to an authoritative reference with the formulas would be necessary to merge this.  I inquired of pydev list whether improvement is allowed.

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nosy: +terry.reedy

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<https://bugs.python.org/issue45775>
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