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__len__ method for sage.misc.lazy_list #16118

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MatthieuDien opened this issue Apr 10, 2014 · 9 comments
Closed

__len__ method for sage.misc.lazy_list #16118

MatthieuDien opened this issue Apr 10, 2014 · 9 comments
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r: invalid t: enhancement

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@MatthieuDien
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Currently, the only way to obtain the cache's length of a lazy_list is to call info method which print on the standard output :

sage: from sage.misc.lazy_list import lazy_list
sage: l = lazy_list(NN)
sage: l[42]
sage: l.info()
cache length 43
start        0
stop         2147483647
step         1

The goal of this ticket is to provide a __len__ method to obtain this length :

sage: from sage.misc.lazy_list import lazy_list
sage: l = lazy_list(NN)
sage: len(l)
0
sage: l[42]
42
sage: len(l)
43
sage: l[36]
36
sage: len(l)
43

Component: misc

Keywords: days57

Branch/Commit: u/MatthieuDien/__len___method_for_sage_misc_lazy_list @ ed1b53a

Reviewer: Marc Mezzarobba

Issue created by migration from https://trac.sagemath.org/ticket/16118
@MatthieuDien MatthieuDien added this to the sage-6.2 milestone Apr 10, 2014
@MatthieuDien
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Changed keywords from none to days57

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@MatthieuDien
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Branch: u/MatthieuDien/__len___method_for_sage_misc_lazy_list

@MatthieuDien
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Commit: ed1b53a

@MatthieuDien
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New commits:

ed1b53aadd `__len__` method for lazy_list

@MatthieuDien
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comment:6

After some discussions, this ticket need to be closed
See #16137

@MatthieuDien MatthieuDien removed this from the sage-6.2 milestone Apr 12, 2014
@vbraun
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vbraun commented Apr 13, 2014

comment:9

author/reviewer names

@mezzarobba
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Reviewer: Marc Mezzarobba

@vbraun vbraun closed this as completed Apr 14, 2014
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@vbraun @MatthieuDien @mezzarobba