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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
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