Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/rdflib/tools/rdfpipe.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 #!/usr/bin/env python
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2 # -*- coding: UTF-8 -*-
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3 """
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4 A commandline tool for parsing RDF in different formats and serializing the
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5 resulting graph to a chosen format.
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6 """
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7
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8 import sys
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9 from optparse import OptionParser
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10 import logging
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11
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12 import rdflib
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13 from rdflib import plugin
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14 from rdflib.store import Store
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15 from rdflib.graph import ConjunctiveGraph
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16 from rdflib.namespace import RDF, RDFS, OWL, XSD
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17 from rdflib.parser import Parser
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18 from rdflib.serializer import Serializer
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19
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20 from rdflib.util import guess_format
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21 from rdflib.py3compat import PY3
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22
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23
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24 DEFAULT_INPUT_FORMAT = 'xml'
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25 DEFAULT_OUTPUT_FORMAT = 'n3'
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26
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27
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28 def parse_and_serialize(input_files, input_format, guess,
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29 outfile, output_format, ns_bindings,
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30 store_conn="", store_type=None):
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31
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32 if store_type:
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33 store = plugin.get(store_type, Store)()
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34 store.open(store_conn)
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35 graph = ConjunctiveGraph(store)
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36 else:
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37 store = None
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38 graph = ConjunctiveGraph()
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39
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40 for prefix, uri in list(ns_bindings.items()):
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41 graph.namespace_manager.bind(prefix, uri, override=False)
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42
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43 for fpath in input_files:
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44 use_format, kws = _format_and_kws(input_format)
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45 if fpath == '-':
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46 fpath = sys.stdin
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47 elif not input_format and guess:
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48 use_format = guess_format(fpath) or DEFAULT_INPUT_FORMAT
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49 graph.parse(fpath, format=use_format, **kws)
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50
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51 if outfile:
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52 output_format, kws = _format_and_kws(output_format)
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53 kws.setdefault('base', None)
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54 graph.serialize(destination=outfile, format=output_format, **kws)
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55
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56 if store:
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57 store.rollback()
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58
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59
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60 def _format_and_kws(fmt):
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61 """
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62 >>> _format_and_kws("fmt")
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63 ('fmt', {})
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64 >>> _format_and_kws("fmt:+a")
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65 ('fmt', {'a': True})
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66 >>> _format_and_kws("fmt:a")
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67 ('fmt', {'a': True})
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68 >>> _format_and_kws("fmt:+a,-b") #doctest: +SKIP
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69 ('fmt', {'a': True, 'b': False})
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70 >>> _format_and_kws("fmt:c=d")
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71 ('fmt', {'c': 'd'})
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72 >>> _format_and_kws("fmt:a=b:c")
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73 ('fmt', {'a': 'b:c'})
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74 """
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75 fmt, kws = fmt, {}
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76 if fmt and ':' in fmt:
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77 fmt, kwrepr = fmt.split(':', 1)
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78 for kw in kwrepr.split(','):
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79 if '=' in kw:
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80 k, v = kw.split('=')
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81 kws[k] = v
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82 elif kw.startswith('-'):
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83 kws[kw[1:]] = False
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84 elif kw.startswith('+'):
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85 kws[kw[1:]] = True
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86 else: # same as "+"
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87 kws[kw] = True
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88 return fmt, kws
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89
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90
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91 def make_option_parser():
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92 parser_names = _get_plugin_names(Parser)
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93 serializer_names = _get_plugin_names(Serializer)
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94 kw_example = "FORMAT:(+)KW1,-KW2,KW3=VALUE"
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95
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96 oparser = OptionParser(
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97 "%prog [-h] [-i INPUT_FORMAT] [-o OUTPUT_FORMAT] " +
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98 "[--ns=PFX=NS ...] [-] [FILE ...]",
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99 description=__doc__.strip() + (
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100 " Reads file system paths, URLs or from stdin if '-' is given."
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101 " The result is serialized to stdout."),
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102 version="%prog " + "(using rdflib %s)" % rdflib.__version__)
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103
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104 oparser.add_option(
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105 '-i', '--input-format',
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106 type=str, # default=DEFAULT_INPUT_FORMAT,
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107 help="Format of the input document(s)."
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108 " Available input formats are: %s." % parser_names +
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109 " If no format is given, it will be " +
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110 "guessed from the file name extension." +
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111 " Keywords to parser can be given after format like: %s." % kw_example,
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112 metavar="INPUT_FORMAT")
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113
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114 oparser.add_option(
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115 '-o', '--output-format',
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116 type=str, default=DEFAULT_OUTPUT_FORMAT,
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117 help="Format of the graph serialization."
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118 " Available output formats are: %s."
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119 % serializer_names +
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120 " Default format is: '%default'." +
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121 " Keywords to serializer can be given after format like: %s." %
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122 kw_example,
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123 metavar="OUTPUT_FORMAT")
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124
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125 oparser.add_option(
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126 '--ns',
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127 action="append", type=str,
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128 help="Register a namespace binding (QName prefix to a base URI). "
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129 "This can be used more than once.",
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130 metavar="PREFIX=NAMESPACE")
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131
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132 oparser.add_option(
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133 '--no-guess', dest='guess',
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134 action='store_false', default=True,
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135 help="Don't guess format based on file suffix.")
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136
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137 oparser.add_option(
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138 '--no-out',
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139 action='store_true', default=False,
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140 help="Don't output the resulting graph " +
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141 "(useful for checking validity of input).")
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142
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143 oparser.add_option(
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144 '-w', '--warn',
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145 action='store_true', default=False,
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146 help="Output warnings to stderr (by default only critical errors).")
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147
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148 return oparser
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149
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150 _get_plugin_names = lambda kind: ", ".join(
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151 p.name for p in plugin.plugins(kind=kind))
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152
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153
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154 def main():
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155 oparser = make_option_parser()
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156 opts, args = oparser.parse_args()
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157 if len(args) < 1:
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158 oparser.print_usage()
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159 oparser.exit()
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160
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161 if opts.warn:
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162 loglevel = logging.WARNING
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163 else:
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164 loglevel = logging.CRITICAL
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165 logging.basicConfig(level=loglevel)
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166
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167 ns_bindings = {}
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168 if opts.ns:
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169 for ns_kw in opts.ns:
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170 pfx, uri = ns_kw.split('=')
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171 ns_bindings[pfx] = uri
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172
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173 outfile = sys.stdout
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174 if PY3:
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175 outfile = sys.stdout.buffer
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176
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177 if opts.no_out:
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178 outfile = None
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179
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180 parse_and_serialize(args, opts.input_format, opts.guess,
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181 outfile, opts.output_format, ns_bindings)
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182
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183
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184 if __name__ == "__main__":
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185 main()