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# coding: utf-8
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"""Compatibility tricks for Python 3. Mainly to do with unicode.
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This file is deprecated and will be removed in a future version.
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"""
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import functools
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import os
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import sys
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import re
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import shutil
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import types
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import platform
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from .encoding import DEFAULT_ENCODING
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def decode(s, encoding=None):
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encoding = encoding or DEFAULT_ENCODING
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return s.decode(encoding, "replace")
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def encode(u, encoding=None):
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encoding = encoding or DEFAULT_ENCODING
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return u.encode(encoding, "replace")
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def cast_unicode(s, encoding=None):
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if isinstance(s, bytes):
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return decode(s, encoding)
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return s
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def cast_bytes(s, encoding=None):
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if not isinstance(s, bytes):
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return encode(s, encoding)
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return s
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def buffer_to_bytes(buf):
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"""Cast a buffer object to bytes"""
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if not isinstance(buf, bytes):
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buf = bytes(buf)
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return buf
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def safe_unicode(e):
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"""unicode(e) with various fallbacks. Used for exceptions, which may not be
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safe to call unicode() on.
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"""
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try:
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return str(e)
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except UnicodeError:
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pass
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try:
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return repr(e)
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except UnicodeError:
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pass
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return u'Unrecoverably corrupt evalue'
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# keep reference to builtin_mod because the kernel overrides that value
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# to forward requests to a frontend.
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def input(prompt=''):
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return builtin_mod.input(prompt)
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builtin_mod_name = "builtins"
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import builtins as builtin_mod
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MethodType = types.MethodType
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def execfile(fname, glob, loc=None, compiler=None):
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loc = loc if (loc is not None) else glob
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with open(fname, 'rb') as f:
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compiler = compiler or compile
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exec(compiler(f.read(), fname, 'exec'), glob, loc)
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PYPY = platform.python_implementation() == "PyPy"
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# Cython still rely on that as a Dec 28 2019
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# See https://github.com/cython/cython/pull/3291 and
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# https://github.com/ipython/ipython/issues/12068
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def no_code(x, encoding=None):
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return x
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unicode_to_str = cast_bytes_py2 = no_code
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