#15984: Python 3 preparation: Change some code to use more modern Python idioms
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Reporter: wluebbe | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.2
Component: distribution | Keywords: python3
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This fixer changes code like {{{type(x) == T)}}} and {{{while 1:}}} and it
introduces the {{{sorted()}}} function where appropriate.
These changes are optional, but they improve style and may provide a small
performance gain.
Changes according to {{{lib2to3/fixes/fix_idioms.py}}}:
{{{
* Change some type comparisons to isinstance() calls:
type(x) == T -> isinstance(x, T)
type(x) is T -> isinstance(x, T)
type(x) != T -> not isinstance(x, T)
type(x) is not T -> not isinstance(x, T)
* Change "while 1:" into "while True:".
* Change both
v = list(EXPR)
v.sort()
foo(v)
and the more general
v = EXPR
v.sort()
foo(v)
into
v = sorted(EXPR)
foo(v)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15984>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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