#16065: Python 3 preparation: Handle removed exec statement
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Reporter: wluebbe | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: distribution | Resolution:
Keywords: python3 | Merged in:
Authors: André Apitzsch | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/ticket/16065 | 67871a8566fc34de2fc3762a7cf1fce19e316dd9
Dependencies: #16712 | Stopgaps:
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Old description:
> In Py2 there is the
> [[https://docs.python.org/2/reference/simple_stmts.html#index-55|exec
> statement]], while in Py3 there is an
> [[https://docs.python.org/3.3/library/functions.html#exec|exec()
> function]].
>
> The tool 2to3 changes the {{{exec}}} statement into the {{{exec()}}}
> function.
> [[br]]
> But the function is not supported by Py2.
>
> There are 6 effected modules.
>
> This ticket is tracked as a dependency of meta-ticket ticket:16052.
New description:
In Py2 there is the
[[https://docs.python.org/2/reference/simple_stmts.html#index-55|exec
statement]], while in Py3 there is an
[[https://docs.python.org/3.3/library/functions.html#exec|exec()
function]].
The tool 2to3 changes the {{{exec}}} statement into the {{{exec()}}}
function.
[[br]]
The tuple form of {{{exec}}} provides compatibility with Python 3, where
{{{exec}}} is a function rather than a statement.
There are 6 effected modules.
This ticket is tracked as a dependency of meta-ticket ticket:16052.
--
Comment (by aapitzsch):
See https://docs.python.org/2.7/reference/simple_stmts.html#exec
The first expression may also be a tuple of length 2 or 3. In this
case, the optional parts must be omitted. The form {{{exec(expr,
globals)}}} is equivalent to {{{exec expr in globals}}}, while the form
{{{exec(expr, globals, locals)}}} is equivalent to {{{exec expr in
globals, locals}}}. The tuple form of {{{exec}}} provides compatibility
with Python 3, where {{{exec}}} is a function rather than a statement.
--
Ticket URL: <http://trac.sagemath.org/ticket/16065#comment:10>
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