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