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#-----------------------------------------------------------------------------
# Copyright (c) 2008-2012, David P. D. Moss. All rights reserved.
#
# Released under the BSD license. See the LICENSE file for details.
#-----------------------------------------------------------------------------
"""
Compatibility wrappers providing uniform behaviour for Python code required to
run under both Python 2.x and 3.x.
All operations emulate 2.x behaviour where applicable.
"""
import sys as _sys
if _sys.version_info[0] == 3:
# Python 3.x specific logic.
_sys_maxint = _sys.maxsize
_int_type = int
_str_type = str
_is_str = lambda x: isinstance(x, (str, type(''.encode())))
_is_int = lambda x: isinstance(x, int)
_callable = lambda x: hasattr(x, '__call__')
_func_doc = lambda x: x.__doc__
_dict_keys = lambda x: list(x.keys())
_dict_items = lambda x: list(x.items())
_iter_dict_keys = lambda x: x.keys()
def _bytes_join(*args): return ''.encode().join(*args)
def _zip(*args): return list(zip(*args))
def _range(*args, **kwargs): return list(range(*args, **kwargs))
_iter_range = range
def _func_name(f, name=None):
if name is not None: f.__name__ = name
else: return f.__name__
def _func_doc(f, docstring=None):
if docstring is not None: f.__doc__ = docstring
else: return f.__doc__
elif _sys.version_info[0:2] > [2, 3]:
# Python 2.4 or higher.
_sys_maxint = _sys.maxint
_int_type = (int, long)
_str_type = (str, unicode)
# NB - not using basestring here for maximum 2.x compatibility.
_is_str = lambda x: isinstance(x, (str, unicode))
_is_int = lambda x: isinstance(x, (int, long))
_callable = lambda x: callable(x)
_dict_keys = lambda x: x.keys()
_dict_items = lambda x: x.items()
_iter_dict_keys = lambda x: iter(x.keys())
def _bytes_join(*args): return ''.join(*args)
def _zip(*args): return zip(*args)
def _range(*args, **kwargs): return range(*args, **kwargs)
_iter_range = xrange
def _func_name(f, name=None):
if name is not None: f.func_name = name
else: return f.func_name
def _func_doc(f, docstring=None):
if docstring is not None: f.func_doc = docstring
else: return f.func_doc
else:
# Unsupported versions.
raise RuntimeError(
'this module only supports Python 2.4.x or higher (including 3.x)!')
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