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488 lines
19 KiB
Diff
488 lines
19 KiB
Diff
From 8d3cd578f9c0a36d29411c96fa70402a7a56d502 Mon Sep 17 00:00:00 2001
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From: Evgeni Burovski <evgeni@burovski.me>
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Date: Sun, 8 Nov 2015 15:27:22 +0000
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Subject: [PATCH] MAINT: update decorators.py module to version 4.0.5
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This is commit d6abda0 at
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https://github.com/micheles/decorator/tree/4.0.5
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---
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scipy/_lib/decorator.py | 380 +++++++++++++++++++++++++++++++++++++-----------
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1 file changed, 293 insertions(+), 87 deletions(-)
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diff --git a/scipy/_lib/decorator.py b/scipy/_lib/decorator.py
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index 07d9d21..05f7056 100644
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--- a/scipy/_lib/decorator.py
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+++ b/scipy/_lib/decorator.py
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@@ -1,48 +1,52 @@
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-########################## LICENCE ###############################
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-##
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-## Copyright (c) 2005-2011, Michele Simionato
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-## All rights reserved.
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-##
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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 bytecode form must reproduce the above copyright
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-## notice, this list of conditions and the following disclaimer in
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-## the documentation and/or other materials provided with the
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-## distribution.
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-
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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 COPYRIGHT
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-## HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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-## INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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-## BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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-## OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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-## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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-## TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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-## USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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-## DAMAGE.
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+# ######################### LICENSE ############################ #
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+
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+# Copyright (c) 2005-2015, Michele Simionato
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+# All rights reserved.
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+
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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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+
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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 bytecode form must reproduce the above copyright
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+# notice, this list of conditions and the following disclaimer in
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+# the documentation and/or other materials provided with the
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+# distribution.
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+
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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 COPYRIGHT
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+# HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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+# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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+# DAMAGE.
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"""
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Decorator module, see http://pypi.python.org/pypi/decorator
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for the documentation.
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"""
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+from __future__ import print_function
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-from __future__ import division, print_function, absolute_import
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-
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-__version__ = '3.3.2'
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-
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-__all__ = ["decorator", "FunctionMaker"]
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-
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-import sys
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import re
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+import sys
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import inspect
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-from functools import partial
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+import operator
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+import itertools
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+import collections
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-from scipy._lib.six import exec_
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+__version__ = '4.0.5'
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if sys.version >= '3':
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from inspect import getfullargspec
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+
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+ def get_init(cls):
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+ return cls.__init__
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else:
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class getfullargspec(object):
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"A quick and dirty replacement for getfullargspec for Python 2.X"
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@@ -51,7 +55,6 @@ else:
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inspect.getargspec(f)
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self.kwonlyargs = []
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self.kwonlydefaults = None
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- self.annotations = getattr(f, '__annotations__', {})
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def __iter__(self):
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yield self.args
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@@ -59,17 +62,35 @@ else:
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yield self.varkw
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yield self.defaults
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-DEF = re.compile('\s*def\s*([_\w][_\w\d]*)\s*\(')
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+ getargspec = inspect.getargspec
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+
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+ def get_init(cls):
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+ return cls.__init__.__func__
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+
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+# getargspec has been deprecated in Python 3.5
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+ArgSpec = collections.namedtuple(
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+ 'ArgSpec', 'args varargs varkw defaults')
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-# basic functionality
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+def getargspec(f):
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+ """A replacement for inspect.getargspec"""
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+ spec = getfullargspec(f)
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+ return ArgSpec(spec.args, spec.varargs, spec.varkw, spec.defaults)
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+DEF = re.compile('\s*def\s*([_\w][_\w\d]*)\s*\(')
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+
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+
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+# basic functionality
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class FunctionMaker(object):
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"""
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An object with the ability to create functions with a given signature.
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It has attributes name, doc, module, signature, defaults, dict and
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methods update and make.
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"""
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+
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+ # Atomic get-and-increment provided by the GIL
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+ _compile_count = itertools.count()
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+
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def __init__(self, func=None, name=None, signature=None,
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defaults=None, doc=None, module=None, funcdict=None):
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self.shortsignature = signature
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@@ -82,22 +103,32 @@ class FunctionMaker(object):
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self.module = func.__module__
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if inspect.isfunction(func):
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argspec = getfullargspec(func)
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+ self.annotations = getattr(func, '__annotations__', {})
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for a in ('args', 'varargs', 'varkw', 'defaults', 'kwonlyargs',
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- 'kwonlydefaults', 'annotations'):
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+ 'kwonlydefaults'):
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setattr(self, a, getattr(argspec, a))
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for i, arg in enumerate(self.args):
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setattr(self, 'arg%d' % i, arg)
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- self.signature = inspect.formatargspec(
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- formatvalue=lambda val: "", *argspec)[1:-1]
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- allargs = list(self.args)
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- if self.varargs:
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- allargs.append('*' + self.varargs)
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- if self.varkw:
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- allargs.append('**' + self.varkw)
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- try:
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- self.shortsignature = ', '.join(allargs)
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- except TypeError: # exotic signature, valid only in Python 2.X
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- self.shortsignature = self.signature
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+ if sys.version < '3': # easy way
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+ self.shortsignature = self.signature = (
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+ inspect.formatargspec(
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+ formatvalue=lambda val: "", *argspec)[1:-1])
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+ else: # Python 3 way
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+ allargs = list(self.args)
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+ allshortargs = list(self.args)
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+ if self.varargs:
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+ allargs.append('*' + self.varargs)
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+ allshortargs.append('*' + self.varargs)
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+ elif self.kwonlyargs:
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+ allargs.append('*') # single star syntax
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+ for a in self.kwonlyargs:
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+ allargs.append('%s=None' % a)
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+ allshortargs.append('%s=%s' % (a, a))
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+ if self.varkw:
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+ allargs.append('**' + self.varkw)
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+ allshortargs.append('**' + self.varkw)
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+ self.signature = ', '.join(allargs)
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+ self.shortsignature = ', '.join(allshortargs)
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self.dict = func.__dict__.copy()
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# func=None happens when decorating a caller
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if name:
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@@ -122,12 +153,15 @@ class FunctionMaker(object):
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func.__name__ = self.name
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func.__doc__ = getattr(self, 'doc', None)
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func.__dict__ = getattr(self, 'dict', {})
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- if sys.version_info[0] >= 3:
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- func.__defaults__ = getattr(self, 'defaults', ())
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- else:
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- func.func_defaults = getattr(self, 'defaults', ())
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+ func.__defaults__ = getattr(self, 'defaults', ())
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func.__kwdefaults__ = getattr(self, 'kwonlydefaults', None)
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- callermodule = sys._getframe(3).f_globals.get('__name__', '?')
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+ func.__annotations__ = getattr(self, 'annotations', None)
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+ try:
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+ frame = sys._getframe(3)
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+ except AttributeError: # for IronPython and similar implementations
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+ callermodule = '?'
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+ else:
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+ callermodule = frame.f_globals.get('__name__', '?')
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func.__module__ = getattr(self, 'module', callermodule)
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func.__dict__.update(kw)
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@@ -140,16 +174,20 @@ class FunctionMaker(object):
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raise SyntaxError('not a valid function template\n%s' % src)
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name = mo.group(1) # extract the function name
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names = set([name] + [arg.strip(' *') for arg in
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- self.shortsignature.split(',')])
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+ self.shortsignature.split(',')])
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for n in names:
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if n in ('_func_', '_call_'):
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raise NameError('%s is overridden in\n%s' % (n, src))
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if not src.endswith('\n'): # add a newline just for safety
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src += '\n' # this is needed in old versions of Python
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+
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+ # Ensure each generated function has a unique filename for profilers
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+ # (such as cProfile) that depend on the tuple of (<filename>,
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+ # <definition line>, <function name>) being unique.
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+ filename = '<decorator-gen-%d>' % (next(self._compile_count),)
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try:
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- code = compile(src, '<string>', 'single')
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- # print >> sys.stderr, 'Compiling %s' % src
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- exec_(code, evaldict)
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+ code = compile(src, filename, 'single')
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+ exec(code, evaldict)
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except:
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print('Error in generated code:', file=sys.stderr)
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print(src, file=sys.stderr)
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@@ -165,9 +203,9 @@ class FunctionMaker(object):
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doc=None, module=None, addsource=True, **attrs):
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"""
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Create a function from the strings name, signature and body.
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- evaldict is the evaluation dictionary. If addsource is true an attribute
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- __source__ is added to the result. The attributes attrs are added,
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- if any.
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+ evaldict is the evaluation dictionary. If addsource is true an
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+ attribute __source__ is added to the result. The attributes attrs
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+ are added, if any.
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"""
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if isinstance(obj, str): # "name(signature)"
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name, rest = obj.strip().split('(', 1)
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@@ -180,37 +218,205 @@ class FunctionMaker(object):
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self = cls(func, name, signature, defaults, doc, module)
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ibody = '\n'.join(' ' + line for line in body.splitlines())
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return self.make('def %(name)s(%(signature)s):\n' + ibody,
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- evaldict, addsource, **attrs)
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+ evaldict, addsource, **attrs)
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-def decorator(caller, func=None):
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+def decorate(func, caller):
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"""
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- decorator(caller) converts a caller function into a decorator;
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- decorator(caller, func) decorates a function using a caller.
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+ decorate(func, caller) decorates a function using a caller.
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"""
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- if func is not None: # returns a decorated function
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- if sys.version_info[0] >= 3:
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- evaldict = func.__globals__.copy()
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+ evaldict = func.__globals__.copy()
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+ evaldict['_call_'] = caller
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+ evaldict['_func_'] = func
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+ fun = FunctionMaker.create(
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+ func, "return _call_(_func_, %(shortsignature)s)",
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+ evaldict, __wrapped__=func)
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+ if hasattr(func, '__qualname__'):
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+ fun.__qualname__ = func.__qualname__
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+ return fun
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+
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+
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+def decorator(caller, _func=None):
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+ """decorator(caller) converts a caller function into a decorator"""
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+ if _func is not None: # return a decorated function
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+ # this is obsolete behavior; you should use decorate instead
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+ return decorate(_func, caller)
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+ # else return a decorator function
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+ if inspect.isclass(caller):
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+ name = caller.__name__.lower()
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+ callerfunc = get_init(caller)
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+ doc = 'decorator(%s) converts functions/generators into ' \
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+ 'factories of %s objects' % (caller.__name__, caller.__name__)
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+ elif inspect.isfunction(caller):
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+ if caller.__name__ == '<lambda>':
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+ name = '_lambda_'
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else:
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- evaldict = func.func_globals.copy()
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- evaldict['_call_'] = caller
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- evaldict['_func_'] = func
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+ name = caller.__name__
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+ callerfunc = caller
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+ doc = caller.__doc__
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+ else: # assume caller is an object with a __call__ method
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+ name = caller.__class__.__name__.lower()
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+ callerfunc = caller.__call__.__func__
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+ doc = caller.__call__.__doc__
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+ evaldict = callerfunc.__globals__.copy()
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+ evaldict['_call_'] = caller
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+ evaldict['_decorate_'] = decorate
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+ return FunctionMaker.create(
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+ '%s(func)' % name, 'return _decorate_(func, _call_)',
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+ evaldict, doc=doc, module=caller.__module__,
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+ __wrapped__=caller)
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+
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+
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+# ####################### contextmanager ####################### #
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+
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+try: # Python >= 3.2
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+ from contextlib import _GeneratorContextManager
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+except ImportError: # Python >= 2.5
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+ from contextlib import GeneratorContextManager as _GeneratorContextManager
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+
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+
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+class ContextManager(_GeneratorContextManager):
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+ def __call__(self, func):
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+ """Context manager decorator"""
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return FunctionMaker.create(
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- func, "return _call_(_func_, %(shortsignature)s)",
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- evaldict, undecorated=func, __wrapped__=func)
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- else: # returns a decorator
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- if isinstance(caller, partial):
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- return partial(decorator, caller)
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- # otherwise assume caller is a function
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- first = inspect.getargspec(caller)[0][0] # first arg
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- if sys.version_info[0] >= 3:
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- evaldict = caller.__globals__.copy()
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- else:
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- evaldict = caller.func_globals.copy()
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- evaldict['_call_'] = caller
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- evaldict['decorator'] = decorator
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+ func, "with _self_: return _func_(%(shortsignature)s)",
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+ dict(_self_=self, _func_=func), __wrapped__=func)
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+
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+init = getfullargspec(_GeneratorContextManager.__init__)
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+n_args = len(init.args)
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+if n_args == 2 and not init.varargs: # (self, genobj) Python 2.7
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+ def __init__(self, g, *a, **k):
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+ return _GeneratorContextManager.__init__(self, g(*a, **k))
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+ ContextManager.__init__ = __init__
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+elif n_args == 2 and init.varargs: # (self, gen, *a, **k) Python 3.4
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+ pass
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+elif n_args == 4: # (self, gen, args, kwds) Python 3.5
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+ def __init__(self, g, *a, **k):
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+ return _GeneratorContextManager.__init__(self, g, a, k)
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+ ContextManager.__init__ = __init__
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+
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+contextmanager = decorator(ContextManager)
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+
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+
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+# ############################ dispatch_on ############################ #
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+
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+def append(a, vancestors):
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+ """
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+ Append ``a`` to the list of the virtual ancestors, unless it is already
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+ included.
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+ """
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+ add = True
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+ for j, va in enumerate(vancestors):
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+ if issubclass(va, a):
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+ add = False
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+ break
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+ if issubclass(a, va):
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+ vancestors[j] = a
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+ add = False
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+ if add:
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+ vancestors.append(a)
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+
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+
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+# inspired from simplegeneric by P.J. Eby and functools.singledispatch
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+def dispatch_on(*dispatch_args):
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+ """
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+ Factory of decorators turning a function into a generic function
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+ dispatching on the given arguments.
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+ """
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+ assert dispatch_args, 'No dispatch args passed'
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+ dispatch_str = '(%s,)' % ', '.join(dispatch_args)
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+
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+ def check(arguments, wrong=operator.ne, msg=''):
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+ """Make sure one passes the expected number of arguments"""
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+ if wrong(len(arguments), len(dispatch_args)):
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+ raise TypeError('Expected %d arguments, got %d%s' %
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+ (len(dispatch_args), len(arguments), msg))
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+
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+ def gen_func_dec(func):
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+ """Decorator turning a function into a generic function"""
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+
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+ # first check the dispatch arguments
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+ argset = set(getfullargspec(func).args)
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+ if not set(dispatch_args) <= argset:
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+ raise NameError('Unknown dispatch arguments %s' % dispatch_str)
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+
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+ typemap = {}
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+
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+ def vancestors(*types):
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+ """
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+ Get a list of sets of virtual ancestors for the given types
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+ """
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+ check(types)
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+ ras = [[] for _ in range(len(dispatch_args))]
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+ for types_ in typemap:
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+ for t, type_, ra in zip(types, types_, ras):
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+ if issubclass(t, type_) and type_ not in t.__mro__:
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+ append(type_, ra)
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+ return [set(ra) for ra in ras]
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+
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+ def ancestors(*types):
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+ """
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+ Get a list of virtual MROs, one for each type
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+ """
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+ check(types)
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+ lists = []
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+ for t, vas in zip(types, vancestors(*types)):
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+ n_vas = len(vas)
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+ if n_vas > 1:
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+ raise RuntimeError(
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+ 'Ambiguous dispatch for %s: %s' % (t, vas))
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+ elif n_vas == 1:
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+ va, = vas
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+ mro = type('t', (t, va), {}).__mro__[1:]
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+ else:
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+ mro = t.__mro__
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+ lists.append(mro[:-1]) # discard t and object
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+ return lists
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+
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+ def register(*types):
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+ """
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+ Decorator to register an implementation for the given types
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+ """
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+ check(types)
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+ def dec(f):
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+ check(getfullargspec(f).args, operator.lt, ' in ' + f.__name__)
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+ typemap[types] = f
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+ return f
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+ return dec
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+
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+ def dispatch_info(*types):
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+ """
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+ An utility to introspect the dispatch algorithm
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+ """
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+ check(types)
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+ lst = []
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|
+ for anc in itertools.product(*ancestors(*types)):
|
|
+ lst.append(tuple(a.__name__ for a in anc))
|
|
+ return lst
|
|
+
|
|
+ def _dispatch(dispatch_args, *args, **kw):
|
|
+ types = tuple(type(arg) for arg in dispatch_args)
|
|
+ try: # fast path
|
|
+ f = typemap[types]
|
|
+ except KeyError:
|
|
+ pass
|
|
+ else:
|
|
+ return f(*args, **kw)
|
|
+ combinations = itertools.product(*ancestors(*types))
|
|
+ next(combinations) # the first one has been already tried
|
|
+ for types_ in combinations:
|
|
+ f = typemap.get(types_)
|
|
+ if f is not None:
|
|
+ return f(*args, **kw)
|
|
+
|
|
+ # else call the default implementation
|
|
+ return func(*args, **kw)
|
|
+
|
|
return FunctionMaker.create(
|
|
- '%s(%s)' % (caller.__name__, first),
|
|
- 'return decorator(_call_, %s)' % first,
|
|
- evaldict, undecorated=caller, __wrapped__=caller,
|
|
- doc=caller.__doc__, module=caller.__module__)
|
|
+ func, 'return _f_(%s, %%(shortsignature)s)' % dispatch_str,
|
|
+ dict(_f_=_dispatch), register=register, default=func,
|
|
+ typemap=typemap, vancestors=vancestors, ancestors=ancestors,
|
|
+ dispatch_info=dispatch_info, __wrapped__=func)
|
|
+
|
|
+ gen_func_dec.__name__ = 'dispatch_on' + dispatch_str
|
|
+ return gen_func_dec
|
|
--
|
|
2.6.3
|
|
|