1# 2# Copyright (c) 2005 Dima Dorfman. 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26 27__all__ = ['compose', 'fastcut'] 28__revision__ = '$Dima: pylib/functools/functools.py,v 1.2 2005/08/22 07:05:22 dima Exp $' 29 30 31def compose(*args): 32 33 if len(args) < 1: 34 raise TypeError, 'compose expects at least one argument' 35 fs = args[-2::-1] 36 g = args[-1] 37 38 def composecall(*args, **kw): 39 res = g(*args, **kw) 40 for f in fs: 41 res = f(res) 42 return res 43 44 return composecall 45 46 47def fastcut(*sargs, **skw): 48 try: 49 fun = sargs[0] 50 except IndexError: 51 raise TypeError, 'fastcut requires at least one argument' 52 sargs = sargs[1:] 53 54 def fastcutcall(*args, **kw): 55 rkw = skw.copy() 56 rkw.update(kw) 57 return fun(*(sargs + args), **rkw) 58 59 return fastcutcall 60 61 62for x in __all__: 63 globals()['py_%s' % x] = globals()[x] 64del x 65 66try: 67 import _functools 68except ImportError: 69 pass 70else: 71 for x in __all__: 72 globals()['c_%s' % x] = globals()[x] = getattr(_functools, x) 73 del x 74