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# coding: utf-8

"""Compatibility tricks for Python 3. Mainly to do with unicode.

This file is deprecated and will be removed in a future version.

"""

import platform

import builtins as builtin_mod

from .encoding import DEFAULT_ENCODING

def decode(s, encoding=None):

encoding = encoding or DEFAULT_ENCODING

return s.decode(encoding, "replace")

def encode(u, encoding=None):

encoding = encoding or DEFAULT_ENCODING

return u.encode(encoding, "replace")

def cast_unicode(s, encoding=None):

if isinstance(s, bytes):

return decode(s, encoding)

return s

def safe_unicode(e):

"""unicode(e) with various fallbacks. Used for exceptions, which may not be

safe to call unicode() on.

"""

try:

return str(e)

except UnicodeError:

pass

try:

return repr(e)

except UnicodeError:

pass

return "Unrecoverably corrupt evalue"

# keep reference to builtin_mod because the kernel overrides that value

# to forward requests to a frontend.

def input(prompt=""):

return builtin_mod.input(prompt)

def execfile(fname, glob, loc=None, compiler=None):

loc = loc if (loc is not None) else glob

with open(fname, "rb") as f:

compiler = compiler or compile

exec(compiler(f.read(), fname, "exec"), glob, loc)

PYPY = platform.python_implementation() == "PyPy"

# Cython still rely on that as a Dec 28 2019

# See https://github.com/cython/cython/pull/3291 and

# https://github.com/ipython/ipython/issues/12068

def no_code(x, encoding=None):

return x

unicode_to_str = cast_bytes_py2 = no_code