I have a bytes object, for instance
test = b'\x83\xf8\x41\x41\x41' I would like to print this object to stdout, but if I do, Python converts the printable characters in the object to ASCII:
print(test) b'\x83\xf8AAA' Is there a way to force Python 3 to print the printable characters (in this instance, three 'A's) as escaped bytes?
That is, so that print(test) outputs
b'\x83\xf8\x41\x41\x41' No, the repr() output is not configurable; it is a debug tool.
You could use binascii.hexlify() to get a hex representation:
>>> test = b'\x83\xf8\x41\x41\x41' >>> from binascii import hexlify >>> test = b'\x83\xf8\x41\x41\x41' >>> print(hexlify(test)) b'83f8414141' or you could convert each individual 'byte' value to a hex representation:
>>> print("b'{}'".format(''.join('\\x{:02x}'.format(b) for b in test))) b'\x83\xf8\x41\x41\x41' This produces an alternative representation.
You can create your own class for this:
class EscapeAll(bytes): def __str__(self): return 'b\'{}\''.format(''.join('\\x{:02x}'.format(b) for b in self)) # b'\x31\x32\x33' print(EscapeAll(b'123')) Here's a way that's 30x ! faster (134 MiB/s on Intel i7-8700, Python2) than
''.join('\\x{:02x}'.format(b) for b in test) It avoids iterating using slow, interpreted Python loops and iterates in optimized code. The optimized binascii also contributes to the speed
import binascii hex=binascii.b2a_hex(test) # add \x prefix hex2=bytearray(4*len(b)) hex2[0::4]='\\'*len(b) hex2[1::4]='x'*len(b) hex2[2::4]=hex[0::2] hex2[3::4]=hex[1::2] 
'\\' and 'x' need to be bytes, so b'\\' and b'x'. Also, if we're being picky about speed, it might be worth putting len(b) in a variable :)