annotate src/tools/common/data_format.py @ 2361:5defafc8ede6

core, frontends (xmlui): new LabelContainer: LabelContainer is like a PairContainer where first widget can only be LabelWidget or EmptyWidget. This case is the most common, and allow to generate better code when label can be associated to widget (e.g. in HTML).
author Goffi <goffi@goffi.org>
date Sun, 24 Sep 2017 16:36:11 +0200
parents f67434fd88d2
children 8b37a62336c3
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rev   line source
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2daf7b4c6756 use of /usr/bin/env instead of /usr/bin/python in shebang
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT: a jabber client
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d17772b0fe22 copyright update
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 """ tools common to backend and frontends """
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21 # FIXME: json may be more appropriate than manual serialising like done here
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22
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23 from sat.core import exceptions
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24
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25 def dict2iter(name, dict_, pop=False):
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26 """iterate into a list serialised in a dict
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27
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28 name is the name of the key.
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29 Serialisation is done with [name] [name#1] [name#2] and so on
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30 e.g.: if name is 'group', keys are group, group#1, group#2, ...
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31 iteration stop at first missing increment
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32 Empty values are possible
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33 @param name(unicode): name of the key
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34 @param dict_(dict): dictionary with the serialised list
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35 @param pop(bool): if True, remove the value from dict
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36 @return iter: iterate through the deserialised list
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37 """
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38 if pop:
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39 get=lambda d,k: d.pop(k)
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40 else:
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41 get=lambda d,k: d[k]
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42
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43 try:
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44 yield get(dict_,name)
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45 except KeyError:
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46 return
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47 else:
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48 idx = 1
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49 while True:
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50 try:
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51 yield get(dict_,u'{}#{}'.format(name, idx))
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52 except KeyError:
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53 return
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54 else:
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55 idx += 1
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56
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57 def dict2iterdict(name, dict_, extra_keys, pop=False):
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58 """like dict2iter but yield dictionaries
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59
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60 params are like in [dict2iter], extra_keys is used for extra dict keys.
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61 e.g. dict2iterdict(comments, mb_data, ('node', 'service')) will yield dicts like:
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62 {u'comments': u'value1', u'node': u'value2', u'service': u'value3'}
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63 """
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64 # FIXME: this format seem overcomplicated, it may be more appropriate to use json here
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65 if pop:
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66 get=lambda d,k: d.pop(k)
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67 else:
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68 get=lambda d,k: d[k]
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69 for idx, main_value in enumerate(dict2iter(name, dict_, pop=pop)):
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70 ret = {name: main_value}
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71 for k in extra_keys:
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72 ret[k] = get(dict_, u'{}{}_{}'.format(name, (u'#' + unicode(idx)) if idx else u'', k))
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73 yield ret
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74
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75 def iter2dict(name, iter_, dict_=None, check_conflict=True):
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76 """Fill a dict with values from an iterable
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77
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78 name is used to serialise iter_, in the same way as in [dict2iter]
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79 Build from the tags a dict using the microblog data format.
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80
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81 @param name(unicode): key to use for serialisation
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82 e.g. "group" to have keys "group", "group#1", "group#2", ...
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83 @param iter_(iterable): values to store
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84 @param dict_(None, dict): dictionary to fill, or None to create one
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85 @param check_conflict(bool): if True, raise an exception in case of existing key
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86 @return (dict): filled dict, or newly created one
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87 @raise exceptions.ConflictError: a needed key already exists
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88 """
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89 if dict_ is None:
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90 dict_ = {}
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91 for idx, value in enumerate(iter_):
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92 if idx == 0:
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93 key = name
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94 else:
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95 key = u'{}#{}'.format(name, idx)
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96 if check_conflict and key in dict_:
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97 raise exceptions.ConflictError
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98 dict_[key] = value
204c2a7fe68b core (tools): new tools.common module with tools used by backend and frontends. dict2iter and iter2dict method to serialise iterable in a dict (for bridge)
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99 return dict
2079
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parents: 1934
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100
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parents: 1934
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101 def getSubDict(name, dict_, sep=u'_'):
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parents: 1934
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102 """get a sub dictionary from a serialised dictionary
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parents: 1934
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103
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parents: 1934
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104 look for keys starting with name, and create a dict with it
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parents: 1934
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105 eg.: if "key" is looked for, {'html': 1, 'key_toto': 2, 'key_titi': 3} will return:
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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parents: 1934
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106 {None: 1, toto: 2, titi: 3}
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parents: 1934
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107 @param name(unicode): name of the key
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parents: 1934
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108 @param dict_(dict): dictionary with the serialised list
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parents: 1934
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109 @param sep(unicode): separator used between name and subkey
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parents: 1934
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110 @return iter: iterate through the deserialised items
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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parents: 1934
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111 """
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
Goffi <goffi@goffi.org>
parents: 1934
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112 for k,v in dict_.iteritems():
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Goffi <goffi@goffi.org>
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113 if k.startswith(name):
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parents: 1934
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114 if k == name:
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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parents: 1934
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115 yield None, v
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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parents: 1934
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116 else:
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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117 if k[len(name)] != sep:
c8e561a5b2b6 core (tools/common): added getSubDict method in data_format to get sub dictionary from serialised one
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parents: 1934
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118 continue
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parents: 1934
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119 else:
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parents: 1934
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120 yield k[len(name)+1:], v