Mercurial > libervia-backend
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 |
| rev | line source |
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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 |
| 1766 | 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 |
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99 return dict |
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100 |
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101 def getSubDict(name, dict_, sep=u'_'): |
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102 """get a sub dictionary from a serialised dictionary |
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103 |
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104 look for keys starting with name, and create a dict with it |
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105 eg.: if "key" is looked for, {'html': 1, 'key_toto': 2, 'key_titi': 3} will return: |
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106 {None: 1, toto: 2, titi: 3} |
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107 @param name(unicode): name of the key |
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108 @param dict_(dict): dictionary with the serialised list |
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109 @param sep(unicode): separator used between name and subkey |
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110 @return iter: iterate through the deserialised items |
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111 """ |
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112 for k,v in dict_.iteritems(): |
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113 if k.startswith(name): |
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114 if k == name: |
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115 yield None, v |
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116 else: |
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117 if k[len(name)] != sep: |
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118 continue |
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119 else: |
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120 yield k[len(name)+1:], v |