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bst_fibonacci.py
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Created
Tue, Sep 10, 21:17
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text/x-python
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Thu, Sep 12, 21:17 (1 d, 23 h)
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R3600 invenio-infoscience
bst_fibonacci.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2009, 2010, 2011 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Invenio Bibliographic Tasklet Example.
Demonstrates BibTaskLet <-> BibTask <-> BibSched connectivity
"""
import
sys
import
time
from
invenio.legacy.bibsched.bibtask
import
write_message
,
task_set_option
,
\
task_get_option
,
task_update_progress
,
task_has_option
,
\
task_get_task_param
,
task_sleep_now_if_required
def
fib
(
n
):
"""Returns Fibonacci number for 'n'."""
out
=
1
if
n
>=
2
:
out
=
fib
(
n
-
2
)
+
fib
(
n
-
1
)
return
out
def
bst_fibonacci
(
n
=
30
):
"""
Small tasklets that prints the the Fibonacci sequence for n.
@param n: how many Fibonacci numbers to print.
@type n: int
"""
## Since it's tasklet, the parameter might be passed as a string.
## it should then be converted to an int.
n
=
int
(
n
)
write_message
(
"Printing
%d
Fibonacci numbers."
%
n
,
verbose
=
9
)
for
i
in
range
(
0
,
n
):
if
i
>
0
and
i
%
4
==
0
:
write_message
(
"Error: water in the CPU. Ignoring and continuing."
,
sys
.
stderr
,
verbose
=
3
)
elif
i
>
0
and
i
%
5
==
0
:
write_message
(
"Error: floppy drive dropped on the floor. Ignoring and continuing."
,
sys
.
stderr
)
write_message
(
"fib(
%d
)=
%d
"
%
(
i
,
fib
(
i
)))
task_update_progress
(
"Done
%d
out of
%d
."
%
(
i
,
n
))
task_sleep_now_if_required
(
can_stop_too
=
True
)
time
.
sleep
(
1
)
task_update_progress
(
"Done
%d
out of
%d
."
%
(
n
,
n
))
return
1
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