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annotate env/lib/python3.7/site-packages/libfuturize/fixes/fix_UserDict.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 """Fix UserDict.
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2
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3 Incomplete!
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4
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5 TODO: base this on fix_urllib perhaps?
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6 """
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7
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8
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9 # Local imports
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10 from lib2to3 import fixer_base
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11 from lib2to3.fixer_util import Name, attr_chain
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12 from lib2to3.fixes.fix_imports import alternates, build_pattern, FixImports
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13
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14 MAPPING = {'UserDict': 'collections',
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15 }
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16
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17 # def alternates(members):
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18 # return "(" + "|".join(map(repr, members)) + ")"
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19 #
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20 #
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21 # def build_pattern(mapping=MAPPING):
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22 # mod_list = ' | '.join(["module_name='%s'" % key for key in mapping])
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23 # bare_names = alternates(mapping.keys())
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24 #
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25 # yield """name_import=import_name< 'import' ((%s) |
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26 # multiple_imports=dotted_as_names< any* (%s) any* >) >
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27 # """ % (mod_list, mod_list)
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28 # yield """import_from< 'from' (%s) 'import' ['(']
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29 # ( any | import_as_name< any 'as' any > |
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30 # import_as_names< any* >) [')'] >
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31 # """ % mod_list
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32 # yield """import_name< 'import' (dotted_as_name< (%s) 'as' any > |
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33 # multiple_imports=dotted_as_names<
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34 # any* dotted_as_name< (%s) 'as' any > any* >) >
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35 # """ % (mod_list, mod_list)
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36 #
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37 # # Find usages of module members in code e.g. thread.foo(bar)
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38 # yield "power< bare_with_attr=(%s) trailer<'.' any > any* >" % bare_names
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39
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40
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41 # class FixUserDict(fixer_base.BaseFix):
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42 class FixUserdict(FixImports):
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43
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44 BM_compatible = True
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45 keep_line_order = True
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46 # This is overridden in fix_imports2.
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47 mapping = MAPPING
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48
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49 # We want to run this fixer late, so fix_import doesn't try to make stdlib
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50 # renames into relative imports.
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51 run_order = 6
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52
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53 def build_pattern(self):
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54 return "|".join(build_pattern(self.mapping))
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55
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56 def compile_pattern(self):
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57 # We override this, so MAPPING can be pragmatically altered and the
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58 # changes will be reflected in PATTERN.
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59 self.PATTERN = self.build_pattern()
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60 super(FixImports, self).compile_pattern()
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61
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62 # Don't match the node if it's within another match.
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63 def match(self, node):
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64 match = super(FixImports, self).match
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65 results = match(node)
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66 if results:
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67 # Module usage could be in the trailer of an attribute lookup, so we
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68 # might have nested matches when "bare_with_attr" is present.
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69 if "bare_with_attr" not in results and \
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70 any(match(obj) for obj in attr_chain(node, "parent")):
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71 return False
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72 return results
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73 return False
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74
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75 def start_tree(self, tree, filename):
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76 super(FixImports, self).start_tree(tree, filename)
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77 self.replace = {}
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78
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79 def transform(self, node, results):
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80 import_mod = results.get("module_name")
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81 if import_mod:
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82 mod_name = import_mod.value
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83 new_name = unicode(self.mapping[mod_name])
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84 import_mod.replace(Name(new_name, prefix=import_mod.prefix))
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85 if "name_import" in results:
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86 # If it's not a "from x import x, y" or "import x as y" import,
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87 # marked its usage to be replaced.
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88 self.replace[mod_name] = new_name
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89 if "multiple_imports" in results:
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90 # This is a nasty hack to fix multiple imports on a line (e.g.,
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91 # "import StringIO, urlparse"). The problem is that I can't
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92 # figure out an easy way to make a pattern recognize the keys of
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93 # MAPPING randomly sprinkled in an import statement.
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94 results = self.match(node)
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95 if results:
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96 self.transform(node, results)
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97 else:
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98 # Replace usage of the module.
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99 bare_name = results["bare_with_attr"][0]
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100 new_name = self.replace.get(bare_name.value)
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101 if new_name:
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102 bare_name.replace(Name(new_name, prefix=bare_name.prefix))