src/core/utils.py
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# -*- coding: utf-8 -*-
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#
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# Copyright Institut de Recherche et d'Innovation © 2014
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#
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# contact@iri.centrepompidou.fr
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#
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# Ce code a été développé pour un premier usage dans JocondeLab, projet du 
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# ministère de la culture et de la communication visant à expérimenter la
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# recherche sémantique dans la base Joconde
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# (http://jocondelab.iri-research.org/).
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#
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# Ce logiciel est régi par la licence CeCILL-C soumise au droit français et
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# respectant les principes de diffusion des logiciels libres. Vous pouvez
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# utiliser, modifier et/ou redistribuer ce programme sous les conditions
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# de la licence CeCILL-C telle que diffusée par le CEA, le CNRS et l'INRIA 
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# sur le site "http://www.cecill.info".
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#
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# En contrepartie de l'accessibilité au code source et des droits de copie,
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# de modification et de redistribution accordés par cette licence, il n'est
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# offert aux utilisateurs qu'une garantie limitée.  Pour les mêmes raisons,
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# seule une responsabilité restreinte pèse sur l'auteur du programme,  le
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# titulaire des droits patrimoniaux et les concédants successifs.
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#
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# A cet égard  l'attention de l'utilisateur est attirée sur les risques
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# associés au chargement,  à l'utilisation,  à la modification et/ou au
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# développement et à la reproduction du logiciel par l'utilisateur étant 
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# donné sa spécificité de logiciel libre, qui peut le rendre complexe à 
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# manipuler et qui le réserve donc à des développeurs et des professionnels
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# avertis possédant  des  connaissances  informatiques approfondies.  Les
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# utilisateurs sont donc invités à charger  et  tester  l'adéquation  du
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# logiciel à leurs besoins dans des conditions permettant d'assurer la
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# sécurité de leurs systèmes et ou de leurs données et, plus généralement, 
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# à l'utiliser et l'exploiter dans les mêmes conditions de sécurité. 
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#
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# Le fait que vous puissiez accéder à cet en-tête signifie que vous avez 
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# pris connaissance de la licence CeCILL-C, et que vous en avez accepté les
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# termes.
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#
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'''
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Created on Feb 1, 2012
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@author: ymh
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'''
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import codecs #@UnresolvedImport
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import math
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import sys
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def show_progress(current_line, total_line, label, width, writer=None, newline=False):
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    if writer is None:
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        writer = sys.stdout
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        if sys.stdout.encoding is not None:
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            writer = codecs.getwriter(sys.stdout.encoding)(sys.stdout)
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    percent = (float(current_line) / float(total_line)) * 100.0
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    marks = math.floor(width * (percent / 100.0)) #@UndefinedVariable
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    spaces = math.floor(width - marks) #@UndefinedVariable
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    loader = u'[' + (u'=' * int(marks)) + (u' ' * int(spaces)) + u']'
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    s = u"%s %3d%% %*d/%d - %*s%s" % (loader, percent, len(str(total_line)), current_line, total_line, width, label[:width], "\n" if newline else "\r")
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    writer.write(s) #takes the header into account
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    if percent >= 100:
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        writer.write("\n")
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    writer.flush()
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    return writer