#16073: Python 3 preparation: The semantic of map() function is changed
-------------------------------------------------+-------------------------
Reporter: wluebbe | Owner:
Type: enhancement | Status:
Priority: major | needs_work
Component: distribution | Milestone: sage-6.7
Keywords: python3 | Resolution:
Authors: Wilfried Luebbe, André | Merged in:
Apitzsch | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #18472, #18473, #18474, | Stopgaps:
#18531, #18532 |
-------------------------------------------------+-------------------------
Comment (by wluebbe):
There are still a lot of {{{map()}}} call in the code.
But //not all// occurrences must be removed: there are a number of places
where a Py3 {{{map()}}}-iterator leads to the same result as the Py2
{{{map()}}}.
Here is a long (but incomplete) list:
{{{
all(here_is_an_iterable_allowed)
any(here_is_an_iterable_allowed)
bytearray(here_is_an_iterable_allowed)
dict(here_is_an_iterable_of_key_value_pairs_allowed)
filter(function, here_is_an_iterable_allowed)
frozenset(here_is_an_iterable_allowed)
list(here_is_an_iterable_allowed)
map(function, here_is_an_iterable_allowed)
max(here_is_an_iterable_allowed)
min(here_is_an_iterable_allowed)
reduce(function, here_is_an_iterable_allowed)
set(here_is_an_iterable_allowed)
sorted(here_is_an_iterable_allowed)
sum(here_is_an_iterable_allowed)
tuple(here_is_an_iterable_allowed)
zip(here_is_an_iterable_allowed)
''.join(here_is_an_iterable_allowed)
a,b,c* = here_is_an_iterable_allowed
x[i:j] = here_is_an_iterable_allowed
a_dict.update(here_is_an_iterable_of_key_value_pairs_allowed)
file.writelines(here_is_an_iterable_allowed)
math.fsum(here_is_an_iterable_allowed)
and MANY functions in module itertools.
for i in here_is_an_iterable_allowed:
pass
[2*x for x in here_is_an_iterable_allowed]
(2*x for x in here_is_an_iterable_allowed)
}}}
But if the use of {{{map}}} includes a {{{lambda}}} then replacing it with
a list comprehension improves the readability!
--
Ticket URL: <http://trac.sagemath.org/ticket/16073#comment:54>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
