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100 lines
4.0 KiB
Python
Executable File
100 lines
4.0 KiB
Python
Executable File
"""
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A more or less complete user-defined wrapper around tuple objects.
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Adapted version of the standard library's UserList.
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Taken from Stefan Schwarzer's ftputil library, available at
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<http://www.ndh.net/home/sschwarzer/python/python_software.html>, and used under this license:
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Copyright (C) 1999, Stefan Schwarzer
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the above author nor the names of the
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contributors to the software may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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# $Id$
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#XXX tuple instances (in Python 2.2) contain also:
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# __class__, __delattr__, __getattribute__, __hash__, __new__,
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# __reduce__, __setattr__, __str__
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# What about these?
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class UserTuple:
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def __init__(self, inittuple=None):
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self.data = ()
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if inittuple is not None:
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# XXX should this accept an arbitrary sequence?
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if type(inittuple) == type(self.data):
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self.data = inittuple
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elif isinstance(inittuple, UserTuple):
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# this results in
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# self.data is inittuple.data
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# but that's ok for tuples because they are
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# immutable. (Builtin tuples behave the same.)
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self.data = inittuple.data[:]
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else:
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# the same applies here; (t is tuple(t)) == 1
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self.data = tuple(inittuple)
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def __repr__(self): return repr(self.data)
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def __lt__(self, other): return self.data < self.__cast(other)
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def __le__(self, other): return self.data <= self.__cast(other)
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def __eq__(self, other): return self.data == self.__cast(other)
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def __ne__(self, other): return self.data != self.__cast(other)
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def __gt__(self, other): return self.data > self.__cast(other)
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def __ge__(self, other): return self.data >= self.__cast(other)
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def __cast(self, other):
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if isinstance(other, UserTuple): return other.data
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else: return other
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def __cmp__(self, other):
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return cmp(self.data, self.__cast(other))
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def __contains__(self, item): return item in self.data
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def __len__(self): return len(self.data)
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def __getitem__(self, i): return self.data[i]
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def __getslice__(self, i, j):
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i = max(i, 0); j = max(j, 0)
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return self.__class__(self.data[i:j])
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def __add__(self, other):
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if isinstance(other, UserTuple):
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return self.__class__(self.data + other.data)
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elif isinstance(other, type(self.data)):
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return self.__class__(self.data + other)
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else:
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return self.__class__(self.data + tuple(other))
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# dir( () ) contains no __radd__ (at least in Python 2.2)
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def __mul__(self, n):
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return self.__class__(self.data*n)
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__rmul__ = __mul__
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