Apply Chris Barker's latest PEP 485 changes

This commit is contained in:
Chris Angelico 2015-01-23 11:50:29 +11:00
parent 79268209af
commit 9e4c0dd449
1 changed files with 8 additions and 4 deletions

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@ -82,7 +82,7 @@ comparisons near zero.
Modulo error checking, etc, the function will return the result of::
abs(expected-actual) <= max(tol*actual, abs_tol)
abs(expected-actual) <= max(tol*expected, abs_tol)
Handling of non-finite numbers
@ -103,7 +103,7 @@ theory, it should work for any type that supports ``abs()``,
comparisons, and subtraction. The code will be written and tested to
accommodate these types:
* ``Decimal``
* ``Decimal``: for Decimal, the tolerance must be set to a Decimal type.
* ``int``
@ -123,12 +123,16 @@ optional parameter, ``abs_tol`` (default 0.0) can be used to set a
minimum tolerance to be used in the case of very small relative
tolerance. That is, the values will be considered close if::
abs(a-b) <= abs(tol*actual) or abs(a-b) <= abs_tol
abs(a-b) <= abs(tol*expected) or abs(a-b) <= abs_tol
If the user sets the rel_tol parameter to 0.0, then only the absolute
tolerance will effect the result, so this function provides an
absolute tolerance check as well.
A sample implementation is available (as of Jan 22, 2015) on gitHub:
https://github.com/PythonCHB/close_pep/blob/master/is_close_to.py
Relative Difference
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