use hex instead of ascii when display bytes in ipython

__init__.py

'''
to load allhex any where
copy allhex.py and __init__.py to folder "~/.local/lib/python3.7/site-packages/allhex/"
(3.7 is your python version)
'''

from .allhex import *

allhex.py

# allhex.py

'''
use "%load_ext allhex" to load it
use "%unload_ext allhex" to unload it

to load it automatically, add
`get_ipython().run_line_magic('load_ext', 'allhex')`
to your ~/.ipython/profile_default/startup/load_extensions.py


'''

def load_ipython_extension(ipython):
    formatter = ipython.display_formatter.formatters['text/plain']

    def _repr(obj, p, cycle):
        s = "b'" + (''.join(f'\\x{c:02x}' for c in obj)) + "'"
        p.text(s)

    formatter.for_type(bytes, _repr)

def unload_ipython_extension(ipython):
    formatter = ipython.display_formatter.formatters['text/plain']

    formatter.for_type(bytes, lambda obj, p, cycle: p.text(str(obj)))