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Decode() function is used to remove the prefix b of a string. The function is used to convert from the encoding scheme, in which the argument string is encoded to the desired encoding scheme, through which the b prefix gets removed.
The b" notation is used to specify a bytes string in Python. Compared to the regular strings, which have ASCII characters, the bytes string is an array of byte variables where each hexadecimal element has a value between 0 and 255.
A prefix of 'b' or 'B' is ignored in Python 2. In Python 3, Bytes literals are always prefixed with 'b' or 'B'; they produce an instance of the bytes type instead of the str type. They may only contain ASCII characters; bytes with a numeric value of 128 or greater must be expressed with escapes.
The bytes() function returns a bytes object. It can convert objects into bytes objects, or create empty bytes object of the specified size.
Use decode:
print(curses.version.decode())
# 2.2
If the bytes use an appropriate character encoding already; you could print them directly:
sys.stdout.buffer.write(data)
or
nwritten = os.write(sys.stdout.fileno(), data) # NOTE: it may write less than len(data) bytes
If the data is in an UTF-8 compatible format, you can convert the bytes to a string.
>>> import curses
>>> print(str(curses.version, "utf-8"))
2.2
Optionally convert to hex first, if the data is not already UTF-8 compatible. E.g. when the data are actual raw bytes.
from binascii import hexlify
from codecs import encode # alternative
>>> print(hexlify(b"\x13\x37"))
b'1337'
>>> print(str(hexlify(b"\x13\x37"), "utf-8"))
1337
>>>> print(str(encode(b"\x13\x37", "hex"), "utf-8"))
1337
If we take a look at the source for bytes.__repr__, it looks as if the b'' is baked into the method.
The most obvious workaround is to manually slice off the b'' from the resulting repr():
>>> x = b'\x01\x02\x03\x04'
>>> print(repr(x))
b'\x01\x02\x03\x04'
>>> print(repr(x)[2:-1])
\x01\x02\x03\x04
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