Imagine you have this byte array:
b = bytes([0x00, 0x78, 0x6f, 0x58, 0x00, 0x4f, 0x30, 0x00]
and you want to print it in a somewhat readable way, using ASCII when possible and hex when not. You could simply use Python's built-in conversion:
>>> b
b'\x00xoX\x00O0\x00'
But that's really not particularly readable. What I'd like is this:
00 x o X 00 O 0 00
...that is, a space and the ASCII char if the byte can be printed as ASCII or a two-digit hex value otherwise. I can think of some really awful ways to code this, but there must be a semi-elegant pythonic way. (An array of strings would be great, since you could join() them with a leading space as I've shown above.) How would you do it?
Strings have isprintable and isascii methods which you can use:
>>> def int2str(i):
... s = chr(i)
... if s.isprintable() and s.isascii():
... return format(s, ">2s")
... return format(i, "02x")
...
>>> print(' '.join(map(int2str, b)))
00 x o X 00 O 0 00
>>> print(*map(int2str, b))
00 x o X 00 O 0 00