Merged revisions 59843-59863 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r59844 | raymond.hettinger | 2008-01-07 21:56:05 +0100 (Mon, 07 Jan 2008) | 1 line
Use get() instead of pop() for the optimized version of _replace().
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r59847 | raymond.hettinger | 2008-01-07 22:33:51 +0100 (Mon, 07 Jan 2008) | 1 line
Documentation nits.
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r59849 | raymond.hettinger | 2008-01-08 03:02:05 +0100 (Tue, 08 Jan 2008) | 1 line
Expand comment.
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r59850 | raymond.hettinger | 2008-01-08 03:24:15 +0100 (Tue, 08 Jan 2008) | 1 line
Docs on named tuple's naming conventions and limits of subclassing
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r59851 | christian.heimes | 2008-01-08 04:40:04 +0100 (Tue, 08 Jan 2008) | 1 line
It's verbose, not debug
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r59852 | facundo.batista | 2008-01-08 13:25:20 +0100 (Tue, 08 Jan 2008) | 4 lines
Issue #1757: The hash of a Decimal instance is no longer affected
by the current context. Thanks Mark Dickinson.
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r59853 | andrew.kuchling | 2008-01-08 15:30:55 +0100 (Tue, 08 Jan 2008) | 1 line
Patch 1137: allow assigning to .buffer_size attribute of PyExpat.parser objects
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r59854 | andrew.kuchling | 2008-01-08 15:56:02 +0100 (Tue, 08 Jan 2008) | 1 line
Patch 1114: fix compilation of curses module on 64-bit AIX, and any other LP64 platforms where attr_t isn't a C long
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r59856 | thomas.heller | 2008-01-08 16:15:09 +0100 (Tue, 08 Jan 2008) | 5 lines
Use relative instead of absolute filenames in the C-level tracebacks.
This prevents traceback prints pointing to files in this way:
File "\loewis\25\python\Modules\_ctypes\callbacks.c", line 206, in 'calling callback function'
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r59857 | christian.heimes | 2008-01-08 16:46:10 +0100 (Tue, 08 Jan 2008) | 2 lines
Added __enter__ and __exit__ functions to HKEY object
Added ExpandEnvironmentStrings to the _winreg module.
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r59858 | georg.brandl | 2008-01-08 17:18:26 +0100 (Tue, 08 Jan 2008) | 2 lines
Fix markup errors from r59857 and clarify key.__enter__/__exit__ docs
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r59860 | georg.brandl | 2008-01-08 20:42:30 +0100 (Tue, 08 Jan 2008) | 2 lines
Better method for associating .py files with the interpreter.
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r59862 | facundo.batista | 2008-01-08 22:10:12 +0100 (Tue, 08 Jan 2008) | 9 lines
Issue 846388. Adds a call to PyErr_CheckSignals to
SRE_MATCH so that signal handlers can be invoked during
long regular expression matches. It also adds a new
error return value indicating that an exception
occurred in a signal handler during the match, allowing
exceptions in the signal handler to propagate up to the
main loop. Thanks Josh Hoyt and Ralf Schmitt.
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diff --git a/Lib/decimal.py b/Lib/decimal.py
index 54e8cb4..1f5ff12 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -809,8 +809,10 @@
def __hash__(self):
"""x.__hash__() <==> hash(x)"""
# Decimal integers must hash the same as the ints
- # Non-integer decimals are normalized and hashed as strings
- # Normalization assures that hash(100E-1) == hash(10)
+ #
+ # The hash of a nonspecial noninteger Decimal must depend only
+ # on the value of that Decimal, and not on its representation.
+ # For example: hash(Decimal("100E-1")) == hash(Decimal("10")).
if self._is_special:
if self._isnan():
raise TypeError('Cannot hash a NaN value.')
@@ -826,7 +828,13 @@
# 2**64-1. So we can replace hash((-1)**s*c*10**e) with
# hash((-1)**s*c*pow(10, e, 2**64-1).
return hash((-1)**op.sign*op.int*pow(10, op.exp, 2**64-1))
- return hash(str(self.normalize()))
+ # The value of a nonzero nonspecial Decimal instance is
+ # faithfully represented by the triple consisting of its sign,
+ # its adjusted exponent, and its coefficient with trailing
+ # zeros removed.
+ return hash((self._sign,
+ self._exp+len(self._int),
+ self._int.rstrip('0')))
def as_tuple(self):
"""Represents the number as a triple tuple.