MyHDL to VHDL converter use to write bit strings in binary format.
However, MyHDL generates VHDL2008 code. So instead of generating big binary bit string it would be better to generate hexadecimal bit string.
For example, for a 37bits bit vector :
17179869184 can be written B"0010000000000000000000000000000000000"
17179869184 can also be written 37X"400000000"
Hexadecimal format is much more readable .
I propose to use hexadecimal format instead of binary format when generating VHDL.