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  • 1
    \$\begingroup\$ @movatica - you're right, added it \$\endgroup\$ Commented Jun 28, 2019 at 21:36
  • 1
    \$\begingroup\$ Save 1 byte by hardcoding '#' instead of x[0]. \$\endgroup\$ Commented Jun 28, 2019 at 21:37
  • 1
    \$\begingroup\$ You can skip the list comprehension inside ''.join(...), as it also handles a generator expression. Just remove the [] and save 2 more bytes :) \$\endgroup\$ Commented Jun 28, 2019 at 21:42
  • 1
    \$\begingroup\$ Thanks! range(1,6,2) is even better with [1,3,5] \$\endgroup\$ Commented Jun 28, 2019 at 21:47
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    \$\begingroup\$ Jonathan Allen proposed a different trick for rounding in mz Pzthon3 version. It applies here as well: lambda x:'#'+''.join(hex((int(x[i:i+2],16)+8)/17)[2:]for i in[1,3,5]) -> 69 bytes \$\endgroup\$ Commented Jun 29, 2019 at 7:06