I suggest to include the following in opcode.h:

#ifdef Py_DEBUG
const char *const _PyOpcode_OpName[256] = {
    [0] = "CACHE",
    [1] = "POP_TOP",
    ...
    [255] = "DO_TRACING",
};
#endif

The goal is to make debugging easier. Possible uses:

• This would greatly improve the readability of the output of the LLTRACE feature of ceval.
• This could help make opcode stats files readable between different interpreters without worry of opcode mismatches.
• Other debugging faculties like the #if 0-ed out dump_instr and dump_basicblock of compile.c become easier to understand.
• One-off printf-style debugging of ceval.c and related functionality becomes easier.