New submission from Paul Eckhardt:
The bahaviour of __format__ for decimal.Decimal type differs in one detail from
float:
The minimum number of digits used for the exponent is 1 for Decimal, and 2 for
float.
e.g.: "{:8.2E}".format(1.0) --> "1.00E+00"
"{:8.2E}".format(Decimal(1.0)) --> " 1.00E+0"
Is there any reason for this?
If not, the following patch should do:
--- /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py
2015-03-27 12:55:22.000000000 +0100
+++ ./decimal.py 2015-03-27 14:00:09.000000000 +0100
@@ -6116,7 +6116,7 @@
if exp != 0 or spec['type'] in 'eE':
echar = {'E': 'E', 'e': 'e', 'G': 'E', 'g': 'e'}[spec['type']]
- fracpart += "{0}{1:+}".format(echar, exp)
+ fracpart += "{0}{1:+03d}".format(echar, exp)
if spec['type'] == '%':
fracpart += '%'
----------
components: Library (Lib)
messages: 239394
nosy: MonsieurPaul
priority: normal
severity: normal
status: open
title: decimal.Decimal: __format__ behaviour
type: behavior
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23789>
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